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Chainrings

SRAM RED AXS Power Meter Upgrade Kit
$819.00 - $1,349.00
- AXS enabled for easy monitoring and firmware upgrades - Fully integrated power meter into a direct mount chainring - Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride - Power balance measures left and right legs separately - SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control - Laser-etched chainring finish is more durable - 8-bolt direct mount compatibility only to RED and Force eTap AXS cranks. - Speeds: 12 - Chainring material: Aluminum - Power Meter Type: ANT USB
absoluteBLACK Oval Direct Mount Chainring for SRAM 3-Bolt 6mm Offset
$83.99
absoluteBLACK Oval Direct Mount 1x Chainrings for SRAM greatly improve traction and climbing abilities. They are designed for SRAM cranks that have a 3-bolt direct mount interface and removable spider. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 6mm offset is designed for 135/142 spacing on standard DUB/GXP/Long-Spindle BB30, as well as 170/177 spacing on fat bike cranks
Surly Stainless-Steel Chainring (104mm BCD)
$35.00
Surly's Stainless Steel Chainrings last longer than their aluminum brethern because the 304 grade metal they use is 35% stronger. The rings aren't pinned or ramped so when one side starts to wear you can flip it around and pedal some more! They work great with singlespeed, fixed, and 1x9 applications, and the teeth are 2.2 - 2.3mm thick so they work well with wider chains.
Surly Stainless-Steel Chainring (130mm BCD)
$50.00 - $70.00
Surly's Stainless Steel Chainrings last longer than their aluminum brethern because the 304 grade metal they use is 35% stronger. The rings aren't pinned or ramped so when one side starts to wear you can flip it around and pedal some more! They work great with singlespeed, fixed, and 1x9 applications, and the teeth are 2.1mm thick so they work well with 9-speed chains.
Wolf Tooth Components 102 bcd Chainrings for xtr m960
$75.00 - $77.00
These 102 BCD rings fit Shimano XTR M960 -- they cannot be used on any other crankset! Only purchase this chainring if your crankset looks like the one in the photo on this page. Color: Black Rings have 50mm chainline. All chainrings feature our Drop-Stop tooth design and are made from 7075 Aluminum. Use a 10 or 11 speed chain. If using a 9 speed drivetrain, plan to use a 10 speed chain (it will shift fine), as the 9 speed chain fits too loosely on the ring. *** Be sure to order a colorful set of Wolf Tooth chainring bolts to go with you new ring! Order the 6mm (short) bolt+nut combo. ***
Wolf Tooth Components 110 BCD Cyclocross Chainrings
$79.00 - $84.00
Color: Black 110 mm BCD chainrings to fit standard cranks with 5 bolt, 110 mm spiders. Does NOT fit on the cranksets for Shimano DA 9000 / Ultegra 6800. They WILL work with 11 speed chains. Strongly recommend a 10 or 11 speed chain. If using a 9 speed drivetrain, plan to use a 10 speed chain (it will shift fine), as the 9 speed chain fits too loosely on the ring. *** Be sure to order a colorful set of Wolf Tooth chainring bolts to go with you new ring! Order 6mm (short) bolt+nut combo. *** Note on mud: wide/narrow chainrings do no work well in heavy mud (Wolf Tooth or any other brand) if you plan to ride in very muddy conditions, we recommend a chainguide or chainkeeper and clutch-type rear derailleur! Without these precautions, you may experience chaindrops and/or chainsuck. All chainrings feature our Drop-Stop tooth design and are made from 7075 Aluminum. Use a 10 or 11 speed chain. If using a 9 speed drivetrain, plan to use a 10 speed chain (it will shift fine), as the 9 speed chain fits too loosely on the ring. Product weights: 36t - 58g, 38t - 66g, 40t - 74g, 42t - 81g, 44t - 90g
Wolf Tooth Components 120 BCD 36T Chainrings
$79.00
Color: Black 120 mm BCD chainrings to fit SRAM XX and other 120 mm spiders. Note: This chainring is threaded and will require stock SRAM chainring bolts. WTC bolts do NOT work with this ring. The Chainline is 51mm. We will eventually do a 38T as well but no date at this time. All chainrings feature our Drop-Stop tooth design and are made from 7075 Aluminum. Use a 10 or 11 speed chain. If using a 9 speed drivetrain, plan to use a 10 speed chain (it will shift fine), as the 9 speed chain fits too loosely on the ring. Product weights - 36t - 54g
Wolf Tooth Components 40t gc cog for shimano
$84.95
You asked for it, we made it -- the Wolf Tooth GC is now available in a slightly smaller size! Most of the low gearing from its big brother with improved shifting in the smaller cassette cogs. Be sure to check out the GC tech page for more details This cassette sprocket is only for use with Shimano brand 10spd XT & XTR cassettes. It is NOT compatible with any other brand or model of cassette. The shift points are properly timed to the tooth locations on the 36T Shimano cogs for optimal shifting performance. Use of this cassette sprocket requires removal of the 17T or 15T cog & spacer from your cassette. Note on “B-screw”: We have found a longer screw is almost never needed with SRAM derailleurs and only needed for about 50% of Shimano derailleurs. We have added it as a separate item in our accessories category. If you think you might need the longer screw, order one separately or just go to your local hardware store and pick up an M4 x 25 socket head cap screw. You may need a longer chain than what is presently on your bike. Make sure that when shifted to the 40T cog, there is still some amount of forward travel possible with the rear derailleur cage. This is especially important on bikes with rear suspension. We have tested with Shimano, KMC & SRAM chains – all function well. Compatible only with the following Shimano 10spd cassettes XT 11-36t (CS-M771) XTR 11-36t (M980) Not compatible with SLX 11-36 cassettes because the 17t cog cannot be removed. Note: unlike the 42T, the GC 40T will usually work with 2011 or older SRAM rear derailleurs. We cannot guarantee it on all bikes however. Weight 79g
Wolf Tooth Components 104 BCD Chainrings
$68.00 - $77.00
These fit all common cranksets using 104 BCD mounting. See this WTC Tech Document if you have a Shimano Double M785 XT or M665 SLX double crankset Note that the 30T chainring is threaded and has a 48 mm chainline. All other rings have 50mm chainline. All chainrings feature our Drop-Stop tooth design and are made from 7075 Aluminum. Use a 10 or 11 speed chain. If using a 9 speed drivetrain, plan to use a 10 speed chain (it will shift fine), as the 9 speed chain fits too loosely on the ring. Be sure to order a colorful set of Wolf Tooth chainring bolts to go with your new ring! For the 30T order our 10mm (long) bolts and all other sizes order the 6mm (short) bolt+nut combo. Color: Black Product Weights: 30t - 36g, 32t - 47g, 34t - 56g, 36t - 60g, 38t - 66g
Wolf Tooth Components 130 BCD Cyclocross Chainrings
$79.00
Color: Black 130 mm BCD chainrings to fit standard cranks with 5 bolt, 130 mm spiders. Does NOT fit on the cranksets for Shimano DA 9000 / Ultegra 6800. They WILL work with 11 speed chains. Strongly recommend a 10 or 11 speed chain. If using a 9 speed drivetrain, plan to use a 10 speed chain (it will shift fine), as the 9 speed chain fits too loosely on the ring. *** Be sure to order a colorful set of Wolf Tooth chainring bolts to go with you new ring! Order the 6mm (short) bolt+nut combo. *** Note on mud: wide/narrow chainrings do no work well in heavy mud (Wolf Tooth or any other brand) if you plan to ride in very muddy conditions, we recommend a chainguide or chainkeeper and clutch-type rear derailleur! Without these precautions, you may experience chaindrops and/or chainsuck. 38T important note: The chain will contact the spider arm slightly when using the 38T chainring (see photo below). We recommend filing a small chamfer on the spider arm but you can also just install it and let the chain do the work. This is only an issue with the 38T as the 130 BCD was designed for 39T smallest ring. All chainrings feature our Drop-Stop tooth design and are made from 7075 Aluminum. Use a 10 or 11 speed chain. The only brand of chain we don't recommend is Wippermann. Product weights: 38t - 52g, 40t - 60g, 42t - 62g, 44t - 79g
Wolf Tooth Components 42t gc cog for sram
$89.95
The GC42 cassette cog is so big that when machining the first batch, the machinist thought he made a mistake! If being big is cool then the GC42 is the coolest cog around. This cog is made with the precision and finish our customers have come to expect from WTC, and this enables quite possibly the best feeling shift in the cassette. Be sure to check out the GC tech page for more details. This cassette sprocket is for use only with SRAM brand 10spd X5, X7, and X9 cassettes. It is NOT compatible with any other brand or model of cassette. The shift points are properly timed to the tooth locations on the 36T SRAM cog for optimal shifting performance. Use of this cassette sprocket requires removal of the 17T or 15T cog & spacer from your cassette. Note on “B-screw”: We have found a longer screw is almost never needed with SRAM derailleurs and only needed for about 50% of Shimano derailleurs. We have added it as a separate item in our accessories category. If you think you might need the longer B-screw, order one separately or just go to your local hardware store and pick up an M4 x 25 socket head cap screw. You may need a longer chain than what is presently on your bike. Make sure that when shifted to the 42T cog, there is still some amount of forward travel possible with the rear derailleur cage. This is especially important on bikes with rear suspension. We have tested with Shimano, KMC & SRAM chains – all function well. Compatible only with the following SRAM 10spd cassettes X5 11-36T (PG-1030) X7 11-36T (PG-1050) X9 11-36T (PG-1070) Weight 86g Note: the GC 42 is not compatible with 2011 or older SRAM rear derailleurs due to the location of the upper jockey wheel. The best ways to tell the vintages of your rear derailleur is 1) If you have a type 2 (clutch type) rear derailleur it is 2012 or newer and 2) the upper jockey wheel on 2012 and newer rear derailleurs are offset from the derailleur cage's axis of rotation. It is difficult and sometimes impossible to get satisfactory shifting with the 2011 or older SRAM rear derailleurs so we do not recommend using the GC 42 if you have one of these. The GC 42 works great with the newer SRAM rear derailleurs however.
Wolf Tooth Components red anodized 104 bcd chainrings
$68.00 - $75.00
Same design as our black Drop-Stop 104 BCD chainrings but anodized red! These fit all common cranksets using 104 BCD mounting. See this WTC Tech Document if you have a Shimano Double M785 XT or M665 SLX double crankset Available in 30T, 32T, 34T & 36T sizes. Rings have 50mm chainline. All chainrings feature our Drop-Stop tooth design and are made from 7075 Aluminum. Use a 10 or 11 speed chain. If using a 9 speed drivetrain, plan to use a 10 speed chain (it will shift fine), as the 9 speed chain fits too loosely on the ring. *** Be sure to order a colorful set of Wolf Tooth chainring bolts to go with you new ring! Order the 6mm (short) bolt+nut combo. *** Product Weights: 30t - 36g, 32t - 47g, 34t - 56g, 36t - 60g, 38t - 66g
Wolf Tooth Components direct mount for sram bb30 short spindle cranks
$78.00 - $83.00
These are Direct Mount chainrings for SRAM BB30/PF30 short spindle cranks. This will replace you existing chainring and spider, which is attached via 3 bolts on the back side of the spider near the spindle. You will use these same 3 bolts to attach the SDM ring. The 3rd product picture shows you how to determine if you need this ring or the SDM for GXP/Long Spindle ring. This BB30 short spindle ring is flat whereas the SDM is dished in 6mm. ** Note that these also work great on fat bikes with 190 mm rear hubs when using the X9 or XX1 GXP fat crankset -- they provide a great chainline and offer plenty of clearance for the largest tires! ** BB30 Direct Mount chainrings fit on short spindle BB30 SRAM S2200, S2210, X9, X0, X01, and XX1. Newer S1400 (or X7) cranksets with removable spiders will work with these rings too rings. Older versions of these cranksets do not have removable spiders. If the crankarm and the spider are all made from the same piece of aluminum it is not removable. Chainline is 50mm on a BB30 / PF30 short spindle crankset. About 55mm on GXP or BB30 / PF30 long spindle crankset. All chainrings feature our Drop-Stop tooth design and are made from 7075 Aluminum, color is black unless otherwise specified. Use a 10 or 11 speed chain. If using a 9 speed drivetrain, plan to use a 10 speed chain (it will shift fine), as the 9 speed chain fits too loosely on the ring.
Wolf Tooth Components set of 4 chainring bolts for 104 x 30t (10 mm long)
$14.95
We think these bolts the best on the market. They have a 5 mm hex socket and are 10 mm long so you can use a bash ring with your 30T x 104 chainring. The bolt length is laser engraved on the head to avoid confusion with shorter bolts. Simply better. No nuts are included with these bolts because the 30t x 104 chainring has threaded standoffs. These work great with Wolf Tooth or any other brand threaded M8 x 0.75 chainrings. Designed and manufactured in the USA from 7075-T6 aluminum alloy. Torque: 6-7 N-m MAX with light grease on the threads only. Product weight - 4 bolts = 4g
absoluteBLACK Premium Oval 110 BCD Outer Chainring for FSA ABS
$129.99
absoluteBLACK Premium Oval 110 BCD Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are designed for 4-bolt or 5-bolt FSA cranks such as Gossamer, SL-K, and K-Force with asymmetric bolt spacing. 4- and 5-bolt cranks are identical with the exception of the one hidden bolt behind the crank arm in 5-bolt design, which is not needed. Optimized with smooth shifting in mind, premium chainrings have a unique shift ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - For Gossamer and SL-K cranks, use the original FSA hardware for installation - For K-Force cranks, you will need to purchase absoluteBLACK bolt covers for installation - 3.5% ovality is ideal for road climbing
absoluteBLACK Premium Oval 110 BCD Inner Chainring for FSA ABS
$61.99
absoluteBLACK Premium Oval 110 BCD Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are designed for 4-bolt or 5-bolt FSA cranks such as Gossamer, SL-K, and K-Force with asymmetric bolt spacing. 4- and 5-bolt cranks are identical with the exception of the one hidden bolt behind the crank arm in 5-bolt design, which is not needed. Optimized with smooth shifting in mind, premium chainrings have a unique shift ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - For Gossamer and SL-K cranks, use the original FSA hardware for installation - For K-Force cranks, you will need to purchase absoluteBLACK bolt covers for installation - 3.5% ovality is ideal for road climbing
Shimano Deore XT M8000 1x11 Chainring
$64.99
Shimano XT CRM80 1x11 Chainrings - Hollow gear construction for optimized rigidity, weight, and rigidity - Durable teeth using plated steel construction supported by a carbon composite (CFRP) carrier body - Dyna-Sys11 HG-X11 11-speed chain compatible - Chainring BCD: 96 Shimano Asymmetric - Color: Black - Drivetrain Speeds: 11 - Material: Steel/Carbon - Ring Position/Type: Chain Retaining Single Ring - Tooth Count: 30
Shimano SLX M7000-2 Inner Chainring
$28.00
- Ring Position/Type: Inner - Drivetrain Speeds: 11 - Chainring BCD: 64 Shimano Asymmetric - Material: Aluminum
Shimano XTR M985 AG-type Ring
$36.00
Shimano chainrings offer durability and confidence-inspiring performance, and go a long way towards getting a drivetrain back to optimum working condition.
Shimano XTR M9000 Outer Chainring
$225.00
Shimano XTR M9000 11-Speed Chainrings - Chainring BCD: 96 Shimano Asymmetric - Drivetrain Speeds: 11 - Material: Aluminum - Ring Position/Type: Outer
FSA Afterburner MTB Direct Mount Chainring
$30.00 - $42.00
This direct mount chainring coincides perfectly with the Afterburner Modular Crank. The megatooth design allows you to put all of your power through without worrying about dropping your chain. - Material: Steel - Precision CNC-machined AL7075/T6 - Long tooth profile enhances chain retention - Thick Thin tooth design for maximum chain engagement - SH12: Compatible with Shimano 12s chain
Shimano Deore M533 Chainring
$16.00 - $45.00
Shimano chainrings offer durability and confidence-inspiring performance, and go a long way towards getting a drivetrain back to optimum working condition.
absoluteBLACK Oval Direct Mount Chainring for CINCH 6mm Offset
$83.99
absoluteBLACK Oval Direct Mount 1x Chainrings for CINCH greatly improve traction and climbing abilities. They are designed for Race Face cranks that utilize the CINCH system. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 6mm offset for standard 49mm chainline
absoluteBLACK Premium Oval 110 BCD 4-Bolt Road Outer Chainring for Shimano 9100/8000/7000
$129.99
absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are designed for Shimano Dura-Ace 9100, Ultegra 8000, & 105 R7000 4-bolt cranks only. Optimized with smooth shifting in mind, premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - 10, 11, and 12-speed compatible - Outer rings feature 6-point shifting ramps that work in conjunction with the tooth recesses to stabilize the chain while shifting and allow for easy and quick gear changes - Outer chainrings also feature 12 down-shifting points - Use absoluteBLACK long chainring bolts to install outer ring
SRAM X01 X-Sync Chain Ring
$69.00 - $120.00
Take your chain retention to the quiet, simple, light level with SRAM's X01 X-Sync Chain Ring. It features SRAM's X-Sync narrow/wide tooth profiles to securely hold a chain through the roughest terrain, no chainguide required! A variety of sizes ranging from 30T to 38T let you dial in your rig for your ride. The unique chainring design allows you to slide the ring over the crank arm, so crank removal is not required. Available in 94mm BCD for SRAM's X1 cranks, or 104mm BCD to convert your standard crank to a single-ring system.
Wolf Tooth Components 94 BCD 5-Bolt Chainrings
$69.95
Designed to fit 94 BCD 4-Bolt cranks such as the SRAM X1 crank, these rings will provide maximal chain retention and minimal noise. These rings feature the patent pending Drop-Stop asymmetrical tooth design for the best in wear life, mud clearance, and chain retention. - Features Wolf Tooth's Drop-Stop tooth design for maximum chain retention - Drop-Stop chainrings are designed for use with 1x9, 1x10, 1x11 and 1x12 drivetrains - Compatible with all 10-, 11-, and 12-speed chains, with the exception of Shimano 12-speed chains - Shimano 12-speed chains require the use of Wolf Tooth's Shimano 12-speed specific chainrings - If using a 9-speed drivetrain, use a 10-speed chain, which will provide a tighter fit for better chain retention - Made from 7075-T6 aluminum for long life - 49mm chainline - Use of a clutch-style rear derailleur is recommended
Wolf Tooth Components Elliptical Direct Mount Chainrings for Easton Cinch
$79.95
More power? Check. Better traction? Definitely. Less shifting? Yup. Funky uneven pedal stroke? Not with Wolf Tooth PowerTrac Elliptical (PTE) chainrings. Our proprietary design means a slightly less ovalized ring (10%) with less aggressive timing (112 degree) than competitors versions; any change to your pedal stroke is unnoticeable for most riders, but they still provide the POWER and TRACTION benefits inherent to oval chainrings. Its like having two chainrings in one! With PowerTrac Elliptical rings, the larger-diameter section of the ring engages with the chain at the optimal point on the downstroke, or Power Zone, between 1-5 and 7-11 on a clock face to take advantage of your body's natural biomechanical POWER: For example, during this section, a PTE 34t ring is equivalent to a 36t round ring. Similarly in the Recovery Zone (11-1 and 5-7), the smaller section on the PTE ring engages, maximizing EFFICIENCY in the weakest part of the pedal stroke; here the PTE 34t ring is equivalent to a 32t round ring. Additionally, the above provides a smoother, more efficient pedal rotation, which means better TRACTION. Steadier torque on the rear wheel means less spinning out in the Power Zone, while pedaling is easier during the Recovery Zone so you maintain momentum. Wolf Tooth patented Drop-Stop wide/narrow tooth profile for the ultimate chain retention and mud-shedding ability. Compatibility: - Easton Cinch cranksets including (EC90SL) - 3mm offset provides optimal chainline for CX and Road - Maximum diameter is that of a chainring 2t bigger than the size you order (so be sure there is adequate chainstay clearance!) Specifications: - Chainline 47mm - Mount type: Direct Mount for Easton/Race Face Cinch - Chain Compatibility: Drop-Stop B tooth profile for all 9, 10, and 11spd chains or 12spd SRAM Eagle, KMC, Connex or Wippermann, Campagnolo, and SRAM Flattop AXS chains-
Wolf Tooth Components 64/104 Chainring
$59.95 - $69.95
- Standard 4-bolt ring with Drop-Stop tooth design to prevent unwanted chain drop - Recommended for use with 10 or 11sp chain (10sp chain works on 9sp drivetrain) - Designed and manufactured in the USA from 7075-T6 aluminum alloy - 36g (30t)
absoluteBLACK Oval Direct Mount 1x Chainring for Cannondale
$83.99
absoluteBLACK Oval Direct Mount 1x Chainrings for Cannondale greatly improve traction and climbing abilities. They are designed for Cannondale Hollowgram cranks and are particularly suited for F-Si frames. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5--116.3° after TDC (top dead center). - Compatible with old and new Hollowgram crank models - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio
Wolf Tooth Components Direct Mount Chainrings for SRAM Cranks
$69.95
Wolf Tooth's SDM chainrings replace your existing spider and chainring with one clean looking, light weight, and stiff piece of machined billet. These come in 3 different offsets: standard GXP, Boost and BB30. Compatibility: - These direct mount chainrings will replace your existing chainring and spider, which is attached via 3 bolts on the back side of the spider near the spindle. You will use these same 3 bolts to attach the Wolf Tooth SDM® chainring. There are 3 offsets: - Standard: 47mm chainline, 6mm offset for cyclocross and road cranks - Standard: 49mm chainline, 6mm offset for GXP and long spindle BB30 - Boost: 52mm chainline, 3mm offset - BB30: 49mm chainline, 0mm offset for BB30 short spindle cranks - Fat Bikes: If you are planning to use this on an X9 or XX1 fat bike crankset with a 190/197 rear hub spacing use the 0 offset ring. If your fat bike has a 170/177 rear hub spacing, use the Standard 6mm offset - If you have a BB30 crankset (30mm diameter Aluminum Spindle) this measurement will determine whether it is a long or short spindle:
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