What Axle Do I Need?

If your bike isn't already in our Fit Kit Finder, don't worry. This guide will help you quickly and easily measure your axle and find the right Fit Kit to axle mount your bike rack.

QR Skewer axle on white background

Step 1

Determine what kind of axle you have: thru-axle, QR skewer, or threaded adapter.

Step 2

Pull your stock thru axle out and check for dimensions.

Many axles now come with the length (L) and thread pitch (TP) measurements printed on the axle. Remove the axle from your bike and double-check the dimensions.

  • If your axle has printed dimensions, skip to Step 7.
  • If you don’t see any dimensions, continue to Step 3.

Step 3

Print the following “Measure Your Thru Axle” Guide. 

Be sure to choose your proper paper size. It is very important that you print to “actual size.” 

Do not “fit”, “shrink”, or “scale” this page when printing.

8.5 x 11 Guide A4 Guide

Step 4

Measure the length of your thru axle.

Measure the straight length of the axle shaft. Do not include the axle head or tapered part, if there is one. 

*Note: Axle length is not the same at hub length. A bike with a 12×148 hub will have an axle significantly longer than 148mm.

Step 5

Measure the diameter of your thru axle.

If you are measuring a FRONT thru axle, then you need to determine if it is a 12mm or 15mm axle.

If you are measuring a REAR thru axle, then it can only be 12mm.

*Note: Some thru axles step down to 14 mm diameter at the threads. If you are unsure if you have an M14 or an M15 axle, please contact us.

Step 6

Measure the thread pitch of your thru axle.

  • Place your thru axle threads on top of the Guide. The threads must match exactly.
  • Double check – did you print the Guide to actual size on the right paper?
  • Determine if you have a 1.0, 1.5 or 1.75 thread pitch.

Step 6a

Do you have hubs with solid threaded axles? If yes, use Step 6a. If no, continue to Step 7.

Our Threaded Axle Nuts are the perfect solution for mounting our racks. Whether it’s a bolt-on front or rear hub, or an ebike hub motor we have it covered.

These adapters are robust stainless steel with enough surface area to create a reliable connection with your dropout. Our adapters are available in a variety of sizes to fit most common axle sizes.

  • Use 12mm x 1.25mm for Rad Power Bikes and Mahle/EBIKEMOTION Equipped E-Bikes.
  • Use 10mm x 1.0mm for Rohloff, Enviolo, Shimano Nexave, SRAM I-Motion, and SRAM Torpedo.
  • Use 3/8-26 for Shimano Nexus, Shimano Alfine, Shimano Coasting.

NOTE: If your hub motor’s wiring comes out the end of the axle these adapters will not work.

Please contact us if you need more assistance. Our customer service team is always happy to help.

Step 7

Use the tables below to find the Fit Kit that will fit your bike! Your thru axle can be within +/- 2 mm in length for the right fit.

Front Fit Kits

12mm Front Fit Kits for Road/Gravel/Cross Bikes
Thread Pitch Thru Axle Diameter Thru Axle Shaft Length Fit Kit SKU
1.0 12mm 119 - 125mm SET706.R
1.0 12mm 129 - 135mm SET723.R
1.5 12mm 120 - 125mm SET705.R
1.5 12mm 128 - 134mm SET724.R
1.5 12mm 143mm SET730
1.75 12mm 122mm SET712.R
15mm Front Fit Kits for Road/Gravel/Cross Bikes
Thread Pitch Thru Axle Diameter Thru Axle Shaft Length Fit Kit SKU
1.5 15mm with M14 threads 133 - 138mm SET709
1.5 15mm with M15 threads 125mm SET707
1.5 15mm with M15 threads 130 - 135mm SET727
1.5 15mm with M15 threads 142mm SET713
15mm Front Fit Kits for Mountain Bikes
Thread Pitch Thru Axle Diameter Thru Axle Shaft Length Fit Kit SKU
1.5 15mm with M14 threads 145mm SET702
1.5 15mm with M14 threads 155mm SET704
1.5 15mm with M15 threads 148mm SET701
1.5 15mm with M15 threads 158mm SET703
Suntour Q-Loc 15mm Suntour Q-Loc -- SET720
Manitou Boost Forks Manitou Boost Forks -- SET726
15mm Front Fit Kits for Fat Bikes
Thread Pitch Thru Axle Diameter Thru Axle Shaft Length Fit Kit SKU
1.5mm 15mm with M15 threads 198mm SET715
Manitou Fat Forks Manitou Fat Forks -- SET725
5mm Front QR Skewer Fit Kits
Thread Pitch Thru Axle Diameter Thru Axle Shaft Length Fit Kit SKU
N/A N/A 9x100 QR Skewer SETQRF
N/A N/A Cut to Length 9x295mm QR Skewer SETQRDIY

Rear Fit Kits

12mm Rear Fit Kits
Thread Pitch Thru Axle Diameter Thru Axle Shaft Length Fit Kit SKU
1.0 12mm 154 - 167mm SET817
1.0 12mm 154 - 172mm SET813
1.0 12mm 175 - 184mm SET826
1.0 12mm 173 - 188mm SET827
1.5 12mm 159 - 165mm SET812
1.5 12mm 169 - 178mm SET814
1.5 12mm 176 - 188mm SET822
1.75 12mm 164 - 167mm SET821
1.75 12mm 168 - 180mm SET811
1.75 12mm 168 - 180mm SET810
12mm Rear Fit Kits for Fat Bikes
Thread Pitch Thru Axle Diameter Thru Axle Shaft Length Fit Kit SKU
1.0 12mm 217 - 229mm SET815
1.5 12mm 209mm SET806
1.5 12mm 223 - 229mm SET808
1.75 12mm 209mm SET809
1.75 12mm 217 - 229mm SET807
5mm Rear QR Skewer Fit Kits
Thread Pitch Thru Axle Diameter Thru Axle Shaft Length Fit Kit SKU
N/A N/A 10x135 QR Skewer SETQRR
N/A N/A Cut to Length 9x295mm QR Skewer SETQRDIY