Tools

Park's Compact Crank Puller is used to remove Shimano Octalink, ISIS Drive and square-taper cranksets. It includes 2 rotating tips (16.3 and 11.3mm) to make the job easy. This is a great tool for your travel and home tool kit.

A professional quality shop chain tool that works on 5-speed to 12-speed Road and Mountain Bike derailleur chains*, including SRAM AXS 12 speed, as well as 1/8-inch and 3/16-inch chains. The CT-3.3 features an adjustable locating shelf so it works on any width chain to remove and install chain rivets. Built to last and easy to use, the CT-3.3 features a comfortable handle, investment cast steel body and replaceable driving pin (#CTP). *The CT-3.3 will install, but not peen, Campagnolo 11 and 12-speed chain rivets. - Comfortable T-handle - Replaceable driving pin (CTP) - Investment cast steel body - Adjustable locating shelf

Park's Hex Wrench Set offers all the popular Allen wrenches (1.5, 2, 2.5, 3, 4, 5 and 6mm) in a convenient fold-up unit. The tool tips are chamfered for a positive grip and the one-piece fiber-reinforced-resin handle is light, comfortable, slip resistant and 40% stronger than steel.

Park Tool introduced the bicycle world to the 3-way hex wrench set over 30 years ago. Our 3-way wrenches fit perfectly in the palm of the hand and provide excellent leverage, making them a favorite of countless shop mechanics worldwide. AWS-1 FEATURES - 4mm, 5mm, and 6mm hex set - Wrenches made from industrial tool steel, through hardened and tempered for long life - Chamfered tips for a perfect fit

To prevent poor shifting and uneven drivetrain wear, most manufacturers recommend chain replacement at or before 1% stretch. Now you can quickly and accurately determine the wear and stretch of any chain with Park's Chain Checker. Simply insert the Chain Checker’s pins into 2 links, press the swingarm gauge tight, and then check the gauge window for an accurate reading!

Park's Mini Chain Brute Chain Tool goes anywhere and features a V-shaped handle, a super-strong replaceable pin, and fine threads to make chain removal and installation a breeze. The CT-5 works on any derailleur chain, including Shimano Hyperglide and 9-, 10-, and 11-speed. It works for loosening tight links, too.

• Updated to be stronger, smoother, and more versatile • Features a new material and redesigned tip for easier entry into just about any tire, including tubeless • The unique design lifts the tire away from the rim and features a spoke hook to use when multiple levers are needed • This set includes 3 tire levers

The Masterlink Pliers is a multi-tool developed to provide functions that are not on a typical multi-tool. It is designed to be light and compact so you can carry it with you. This tool serves as a tire lever, valve core remover, valve stem lock nut wrench, and master link pliers. It also provides storage for two master links so you will always be prepared on the trail. Magnets hold the master links securely in place and self close the tool. - Weight: 38.5g - Size: 116 mm x 20 mm x 9 mm - Material: 7075-T6 aluminum - 9, 10, 11, and 12-speed master links and chains - Compatible with SRAM PowerLock Link, Shimano Quick-Link, KMC Missing Link and other similar master links

The ultimate trailside companion. These high tensile steel multi-tools feature a precise fit and finish and side grips for a secure handhold even with gloves on. The m19 includes: - Chain tool: 8/9/10 speed compatible - Spoke wrench: #0, 1, 2, 3 - Hex wrenches: #2, 2.5, 3, 4, 5, 6, 8 - Open wrench: 8mm, 10mm - Screwdrivers: Phillips #1, Phillips #2, flat #2 - Torx: t-10, t-25 - Stainless steel carrying case - Length: 89 mm - Weight: 175g - Warranty: lifetime

- Organize, store and protect riding essentials all in one place - Waterprood Polyurethane case fits mini pumps, tools, tubes phones and money - Fits in a conventional watter bottle cage or jersey pocket

Removes Presta and Schrader valve cores. CNC machined, anodized finish with laser-etched logo. Fits between spokes for quick and easy core removal. Features knurled end for a no-slip grip.

A favorite of shop mechanics for over 30 year's, Park's CCP-22 Crank Puller removes crankarms that feature square tapers, and those that fit on Power Drive and Power Spline bottom bracket interfaces. The long, comfortable, built-in handle and fine thread provide the leverage needed to remove even the tightest crankarms. And, there's a rotating tip to ensure smooth operation and long life.

- Includes everything for a quick fix while on or off-road - Giant seat bag - 12 glueless patches - 2 tire levers - Mini pump - 9 function multi-tool

Get the most from your Bontrager Switch Lever thru axle system. Product details - Original equipment replacement lever for Bontrager Switch Flip thru axles - Can be kept inside the thru axle or left off the bike to save weight - Lever is held securely by internal O-ring on the thru axle

Park's BBT-18 is a heavy duty, investment cast tool for installing and removing all Shimano, ISIS Drive, and ISIS Overdrive 8-notch bottom bracket cups.

The Surly Jethro Tule rocks. It's made from tough, polished stainless steel and sports dual-purpose functionality. One end is the 15mm offset box end wrench you need to take your wheels off. While the other end provides stellar leverage and a bottle opener! That's two of the tools you need, in your pocket, all the time.

Park’s Professional Cable And Housing Cutter is specifically for use on derailleur and brake cables and housing. It even makes quick work of hard-to-cut shift-cable housing. Its cold-forged, heat-treated-steel handles won't bend and its precision-ground jaws cut perfectly every time. Its dual-density molded grips are specially contoured for superior comfort and control. Plus, there’s a built-in cable-end crimper and a forming hole for reforming housing ends.

Cleans bicycle chain quickly, easily, and effectively — without the hassle and mess of removing the chain from the bike. The Cyclone uses a large solvent reservoir, hundreds of rotating bristles, and a two-step cleaning process to get chains really clean, improve shifting performance, and extend the life of the chain and other expensive drivetrain parts. - Works with all multi-speed bikes (5, 6, 7, 8, 9, 10, 11, and 12-speed) as well as some single-speed models and e-bikes - Strong magnet at the bottom of the fluid reservoir holds metallic particles scrubbed from the chain - Special wicking sponge draws solvent from the chain as it exits, minimizing drips and mess - Sturdy handle makes the Cyclone easy to use and control - Holds 2 fluid ounces (59ml) of solvent

Park's Home Mechanic Pedal Wrench is great for your home workshop and event tool box. This top-quality 15mm pedal wrench provides the leverage you need to remove stubborn pedals. It's made to last from heat-treated steel, and the handle has a vinyl grip for comfort.

Refined functionality The Bontrager Elite Multi-Tool combines smooth style with practical design. This elegant tool features a compact design that easily packs away yet provides all of the essential tools to keep your bike tuned and running smoothly. Key features - CNC-machined keys for lightweight durability - 2,2.5,3,4,5,6, and 8 hex along with Phillips, flat and T25 - Slim profile makes it easy to pack on any ride - Ultra-light aluminum alloy design

The new 8-Bit System is a group of multi-tools designed to work together to solve most trailside fixes. They are lightweight, strong, versatile, and small enough to fit in a jersey pocket or riding tool wrap. Three multi-tools begin the 8-Bit System: 8-Bit Chainbreaker + Utility Knife Multi-Tool, 8-Bit Tire Lever + Rim Dent Remover Multi-Tool, and 8-Bit Pack Pliers. A total of 22 functions between the three tools will keep you rolling to the next town or trailhead. - 17 functions: spoke wrench; valve core wrench; flat head #3.5 and Phillips #2 screwdriver bits; 2, 2.5, 3, 4, 5, 6, and 8mm hex; and T10, T25 Torx-compatible bits; install and remove master links; clear tire sealant clogs from valve stem; tighten valve stem lock nut - Magnets keep all bits in place - Ball detent swivel head helps access hard-to-reach places - Handle doubles as breaker bar for extra torque when head is bent - 8mm hex bit tested to over 40 Nm torque - Pliers works with 9-, 10-, 11- and 12-speed master links and chains (not compatible with Campagnolo 12-speed chains) - Master Link storage is compatible with SRAM PowerLock Link, Shimano Quick-Link, KMC Missing Link and other similar master links (not compatible with Connex Links by Wipperman)

The ultimate trailside companion. These high tensile steel multi-tools feature a precise fit and finish and side grips for a secure handhold even with gloves on. The m17 includes: Chain tool: 8/9/10 speed compatible Spoke wrench: #0, 1, 2, 3 Hex wrenches: #2, 2.5, 3, 4, 5, 6, 8 Open wrench: 8mm, 10mm Screwdrivers: Phillips #2, flat #2 Torx: t-25 Length: 89 mm Weight: 168g Warranty: Lifetime

Park's Gear Clean Brush has a handle on one end with a curved, serrated edge perfect for cleaning between cassette cogs. The other end's tough nylon bristles are ideal for cleaning the derailleurs, chain and other drivetrain parts to keep them clean and prevent premature wear. It also works great on brakes and other components that collect dirt and grime. The GearClean easily fits in a toolbox or pack.

Park's Heavy-Duty Tire Levers handle the toughest tire-and-rim combinations including difficult downhill and freestyle tires. Their specially designed tips engage the tire bead so it can be removed with just two levers. Plus, these beefy, forged-steel levers are a full 8-inches long for superior leverage.

An economical option for safely and accurately tightening fasteners to proper torque specifications. With a simple gauge readout, the TW-1.2 is intuitive and easy to use, and applies up to 14 Nm of torque to any fastener or component with left or right-handed threads. Perfect for low-torque applications such as stem bolts, levers, and carbon fiber components. 3/8" drive for compatibility with all Park Tool sockets, bits, and crow feet. - 0 to 14 Newton meter (0 to 140 inch-pound) range - 3/8" drive - Reads and registers torque values for both left hand and right hand threading - Length: 11.5" (292 mm)

Many chains use a master link that allows the chain to be installed and removed by hand. While master links don't require traditional chain tools, over time, dirt and corrosion can make it difficult to separate them by hand. Park's Master Link Pliers make removing and installing these master links quick and easy. Simply insert the specially sized jaws into the link and squeeze the vinyl-coated handles!

Park's Valve Core Tool is great for tightening, removing and installing Schrader and Presta valve cores (the cores are inside the valve), and also Presta valve extenders that have 5mm wrench flats. It's a handy tool to save a tube when all that's wrong is a broken valve, and it also lets you remove valves to easily insert sealant.

- Designed for precise torque and to prevent carbon fiber component damage - 1/4" drive torque wrench with chromoly ratchet head - Chrome plated chrome vanadium Hex and Torx bits (Hex: 2,2.5,3,4,5,6mm Torx: T10,T25,T30) - 100mm extension bar included

A great way to hold small parts, tools and components during a repair, Park Tool's Benchtop Overhaul Mat features multiple small pockets and one large work area. It's perfect for suspension work or to organize parts for installation. • Made of a rubber-like PVC • Cleans easily and looks great on any bench • Measures: 14.7” x 7” (38cm x 18cm)

Park's I-Beam Mini Fold-Up Hex Wrench/Screwdriver/Torx Set with Chain Tool includes 1.5, 2, 2.5, 3, 4, 5, and 6mm Allen wrenches, a socket 8mm Allen, a regular screwdriver, a T25 Torx tool (for disc-rotor bolts), a tire lever, spoke wrenches and a chain tool. The I-Beam conveniently fits in pockets and packs, too.

Securely stow a multi-tool, chain breaker, and master link in your fork’s steerer tube for quick and easy access when you need it. Securely stow your essential trail toolkit in your fork’s steerer tube with this clever integrated storage solution. The compression fitting replaces a traditional MTB fork's star nut and keeps an included multi-tool and more cleanly out of sight, yet always at the ready—and it doesn't require you to thread your fork! Product details - Easy tool access for quick trailside repairs - Bolted compression system securely holds tool and carrier - Compression install replaces the star nut fitting with no need to thread fork - Simple install with two bolt lengths and included spacers for customizing fit - Includes BITS Multi-Tool with hex keys, screwdriver, chain breaker, and storage for quick links - 2, 2.5, 3, 4, 5, 6, and 8mm hex along with T25 and flat-head screwdriver - Compatible with MTB forks with threadless headsets and non-carbon steerer tubes - Not compatible on forks with oval internal steerer tube shapes like the Fox 38

- Lyrik and Pike 29+ Dual Position Air A1 1 year service kit - Includes dust seals, foam rings, o-ring seals, Charger sealhead, DPA sealhead

Application-specific mixture of workshop screwdrivers with normal long blade and especially small Stubby screwdrivers with short blade for hard-to-reach areas. The 2-component Kraftform handle with its practical combination of hard and soft zones allows for a firm grip and precise working. The blades have all the benefits of the Wera Bit technology. Special surface treatment of the blades for high corrosion protection and an optimum fit in the screw head. The hexagon anti-roll protection prevents annoying rolling away of bits in the workplace. - Short compact Stubby screwdriver for working in confined spaces - Laser-tip screwdriver with long blade - Ergonomic 2-component Kraftform handle for precise work - Hexagonal anti-roll feature against rolling away - Take-it-easy tool finder: color coding according to profile and size

A part time universal gear integrated in the handle of the screwdriver significantly increases the working speed. The turbo function can either be switched on or off by pressing a button. Turning it off is recommended for fine adjustment and final tightening or loosening of a high torque screw. The robust steel design is maintenance-free and ensures a long product life. Thanks to the Rapidaptor bit holder, the Kraftform Turbo can be used with all conventional 1/4" hexagon bits for a wide variety of screw profiles. With the Rapidaptor function the bits can be inserted directly and can be easily removed by pushing the sleeve forward—allowing single-hand operation. - Quadruples the screwdriving speed in a purely mechanical way (without battery) - Activation and deactivation of the turbo function by a simple push of a button - The fixable universal gear allows powerful screwdriving and easy fine adjustments - Robust, maintenance-free gear made of steel (maximum torque 14 Nm) - 1/4" hexagon take-up with Rapidaptor quick-release chuck

Premium syringes offer enhanced clarity, improved durability, and ergonomic handles - Red seals provide easy identification for use with mineral oil systems only - 2 syringes per pack

- Essential mechanic tools to properly service and maintain all RockShox products - Clamps the shock body for easy maintenance

- Essential bottom bracket bearing extractor set - (1) 6806 extractor, (1) 24x37 extractor, (1) 29 DUB extractor, (1) 22mm GXP extractor

High-quality, metric, combination ratchet wrench by Wera. The new generation of combination ratchet wrenches. Suitable for hexagon socket screws, bolts or nuts. Comes with holding function, thanks to the metal plate in the jaw, which reduces the risk of dropping nuts and bolts. The replaceable metal plate in the jaw secures nuts and bolts with its extra-hard teeth and reduces the danger of slipping. The integrated limit stop prevents any slipping around the bolt head and allows higher torque to be applied. - Practical holding function due to metal plate in the jaw - Limit stop prevents any slipping - The double-hex geometry reduces the risk of slipping - Return angle of only 30 degrees - "Take-it-easy" tool finder: color coding by size

Simply Accurate – Maintenance-free, Reliable and Affordable Our torque tools use intelligent design for accuracy without the need for expensive calibration. An industrial-grade internal spring manufactured within extremely tight tolerances pre-determines torque setting. The tool does not need to be set into calibration and cannot shift out of calibration. Easy to use Ergonomic handle fits your palm with a four-finger grip to make wrenching easier. Tool provides an unmistakable 20 degree overrun when the torque limit is reached. Users can be confident knowing they have the correct tension. Low profile allows the tool to fit into more places for use, overall 60% lower height than tools costing twice as much. Use it like a tool – safe to un-screw! Prestacycle's TorqKey is fast and easy-to-use as an everyday tool. Color-coded tension markings on both sides make it a quick-grab on your workbench. 50% thicker walls in the bit shaft make our tools stronger and more reliable than others. They provide Torque relief in the right (clockwise) screw tightening direction, and hold firm in the left (counterclockwise) unscrew direction. You can unscrew fittings that were just tightened with the TorqKey. This is very handy when making multiple attempts to get a cable adjustment just right. NOTE: Do not use TorqKey to remove stuck, damaged, rusted or over-tightened fittings. More Options Prestacycle TorqKeys are available in 4Nm, 5Nm, 6Nm, 7Nm, 8Nm, 10Nm and 12Nm. Combine TorqKeys with our Ratchets and Bit sets to make a more complete tool set for Bicycle servicing. Standard Magnetic Hex Tip works with our 20 Piece Bicycle Bits set, our long Bicycle bits and any other 1/4" Hex bits. Prestacycle TorqKeys are different… designed from the start with real-world experience on Bicycles. Specifications: - Torque value accurate to + / – 10%. - Provides 20 degree overrun when maximum torque is reached. - Overrun provides user with unmistakable feedback when torque value is reached. - Polymer T-Handle ergonomically designed for comfortable four-finger & palm grip. - Color-coded tension markings on both sides. - 12mm wide Zinc shaft has 50% thicker walls – stronger than other Torque tools. - Magnetic 1/4" hex bit retention makes bit changes easy. - Torque accuracy life-cycle exceeds 5000 cycles. - Simple to Judge – If the logo is worn, the tool is past life. - Replacing the tool costs less than other tool's calibration service. - Height: 64.5 mm, 2 1/2 inches. - Width: 81 mm, 3.18 inches. - Weight: Approx. 75 grams. - 1 Year limited consumer warranty. Disclaimers Check with the manufacturer of your components and fittings for proper torque specifications. Always follow Manufacturer guidelines for installation and removal of nuts, bolts and screws.

Bicycle maintenance is often delicate, precision work. Having an ergonomic allen wrench set or torx bit set in the palm of your hand is an ideal resource for any mechanic. With these tools alone, installing bike accessories or making component adjustments is quick and simple. Available individually, or find them in our Team Edition and Ride Prep Tool Kits. - 4 / 5 / 6mm Allen key set - Ergonomic, overmolded rubber grip for comfort and precision - Durable polymer core creates a flex-free platform for confidently turning tight bolts - Hardened CRV tool steel maintains precise contact edges - Suitable for low and high torque adjustments on bicycle-specific components - Found in our Team Edition and Ride Prep Tool Kits - Limited Lifetime Warranty

This Wheels Mfg. Double End Bottom Bracket wrench fits 16-notch bearing cups with an outside diameter of 44mm as well as 16-notch bearing cups with an outside diameter of 48.5mm. - Machined aluminum - Anodized red. - Compatible with all current Wheels Mfg bottom brackets with notched cups

Wheels Manufacturing Over Axle Adapters are used for pressing your most commonly used bearing sizes into place. Each represents an excellent addition to the Press-4 Bearing Press. - Adapters sold individually

Wheels Manufacturing Sealed Bearing Extractor - 17mm Fits the following bearings: - 6003 - 6803 - 6903 - 17287

- 200 HOUR/1 YEAR SERVICE KIT (INCLUDES DUST SEALS, FOAM RINGS, O-RING SEALS, CHGR2 DAMPER SEALHEAD, DEBONAIR (SILVER) SEALHEAD—ZEB SELECT+/ULTIMATE A1 (2021)

High-quality L-key set with color-coded, convenient plastic sleeve. This ensures that the tool is quickly to hand and the ergonomic and pleasant handle is easy on the hands even at low temperatures. The wear-resistant clip material ensures secure storage of the L-keys as well as simple removal. The Hex-Plus profile offers a greater contact surface in the head of the screw. The notching effect is therefore reduced to a minimum and damage to the screw head more or less eliminated. The ballpoint on the long arm allows dependable working even in difficult installation situations. The BlackLaser surface treatment provides outstanding surface protection, even against corrosion, and a long service life. Laser-engraved and thereby wear-resistant size markings on the L-keys for rapid accessing. - Hex-Plus allows socket head screws to live longer - Hexagonal ballpoint on the long arm - With Take-it-easy tool finder: color coding by size - Color coded, easy-to-grip plastic sleeve, even at low temperatures

Use as a self-contained grease gun by using the included canister or screw the pump on to any tube of Park Tool grease, anti-seize or assembly compound. Small tip opening ensures precise placement of lube in any application.

Improperly aligned frame or fork dropouts can cause bent axles and quick-release skewers, as well as tracking and shifting problems. The Frame and Fork End Alignment Gauge Set quickly determines whether the frame or fork dropouts are aligned and parallel. If an error is detected, long handles and comfortable molded grips afford plenty of leverage for straightening. These Park gauges adjust to compensate for various hub widths from 100mm to 160mm, too.

The Compact Pocket Rescue tool is back! The first CPR Tool was first developed in 1992 out of race necessity. While leading a World Cup XC, Thomas Frischknecht's stem slipped, causing him to stop, tighten it, and lose valuable time. Tom Ritchey knew he couldn't afford to send his riders across the world to race and have them not finish due to simple mechanicals. Thus, the CPR was born to solve this problem. Lightweight and reliable, the CPR tool was the first multi-tool designed to aid a rider in need while out riding or racing. Now the CPR12+ weighs in at just 96 grams and this investment cast CPR tool packs over 12 individual tools into one small easy to stash utensil. - Compact 2x3" design features a chain breaker, tire lever, Phillips screw driver, T20, T25, 14g spoke wrench, Allen keys 2-6mm and 8mm - Resilient investment cast steel keys with alloy lever - Only 96 grams

The smartest, most convenient torque key now comes with enough bits to suit every need. Make sure those stem bolts are tight enough, and double check the torque on the seatpost bolt while you're at it. The Ritchey Bicycle Torque Key is an essential tool for those important bolts. Available with 4 or 5Nm options, this 6-bit set includes just about every bit you'll need for your bike, and a convenient holder to keep it all organized. - Hex 3/4/5mm - Torx T-20/25 - Phillips #1 - 4 or 5Nm max torque - Bit holder included

The ultimate trailside companion. These high tensile steel multi-tools feature a precise fit and finish and side grips for a secure handhold even with gloves on. The m10 includes: Hex wrenches: #2, 2.5, 3, 4, 5, 6, 8 Screwdrivers: Phillips #2, flat #2 Torx: t-25 Length: 89 mm Weight: 124g Warranty: Lifetime

8-Bit System is a multi-function tool that regroups all potential needs in the field -01 and -02 : 8-Bit Multi-tool plier offer 17 functions: - Master link plier - Valve core wrench; Torx T10 and T25; flat head #3.5; Phillips #2; and hex 2, 2.5, 3, 4, 5,6 and 8mm bits - Includes a tool for clearing tubeless valve stems and a spoke wrench - Storage for one set of quick links -03 : 8-Bit Chainbreaker + Utility Knife Multi-Tool add-on - Chain breaker - L key has a 3mm hex forked tire plug insert - Utility knife - Attach to 8-bit plier with magnets and short pins - Items for internal storage are sold separately -04 : 8-Bit Tire Lever + Rim Dent Remover add-on - Tire lever - Aluminum rim dent remover is designed for use with alloy rims - Attach to 8-bit plier with magnets and short pins -05 : Complete Kit Including Plier and both add-on

- Pedal thread inserts are used to replace damaged threads in cranks

Handy and affordable, this tool makes it easy to get a clean cut every time. - Securely holds hose while cutting - Replaceable blade - Plastic body

- Updated shape features smaller head profile for clearance and longer handle for control. - Superior material and heat treatment outlast the competition. - Precision laser cut design with ergonomic cushioned grip. Pedro's cone wrenches are made from 2mm thick, precision laser cut, heat-treated tool steel and are revered for outlasting many other "shop quality" cones wrenches. Pedro's designed each cone wrench to fit perfectly, protecting the hub and ensuring simple and safe usage for the mechanic. Each flat wrench also features a single-ended design with ergonomic cushioned grip to provide maximum leverage & comfort. The updated shape features a smaller head profile for better clearance and a longer handle for improved leverage and control. Backed by Pedro's lifetime warranty.

- Tensioners for 10mm axle Track, Fixed Gear, BMX, Singlespeed applications - Steel construction with socket for hex wrench adjustment, wrench included - Fits larger 8mm thick dropouts such as aluminum frames - Sold individually

The Ergon TP1 Pedal Cleat Tool is the first tool for precisely and easily adjusting cycling shoes cleats. The ergonomically correct position of the feet on the pedals plays a crucial role in injury prevention and is also important for maximizing both performance and comfort.

Stainless, lightweight, low profile multi-tools optimized for modern component groups. CNC machined aluminum side plates. Forged, Center-Pivot stainless steel bits. Durable stainless steel fastening hardware. - Optimized for mountain bikers and gravel riders - Easy-to-grip alloy side plates with link storage - Anti-corrosion black chrome vanadium bits - Anti-corrosion black chrome vanadium fastening hardware - Hex 2/2.5/3/4/5/6/8mm - T10/T25/T30 - Phillips - New chain breaker tool (included hex 8/10mm wrench, 4 spoke wrenches) - 144g

- Spider removal tool is compatible with all e*thirteen cranks that have a removable spider, and can also be used as an installation/removal tool for e*thirteen bottom brackets

- For installing DUB BSA bottom brackets - Compatible with a 3/8-inch drive torque wrench so you can torque to spec

Wheels Manufacturing open bore adapters are used to press sealed cartridge bearings into place. The adapters are machined with one step to correspond to the bearing OD, which fits in to the center of the sealed bearing and an outside diameter to accommodate the bearing's outer diameter. Size: [Bearing inner diameter] x [Bearing outer diameter] Note: If only one dimension is given, that is the outer diameter of the adapter, with no inner diameter step