Measuring a bike's rear axle to choose a matching thru axle for a trailer hitch
How should a bike owner measure the rear axle to choose the correct thru axle for a bike trailer hitch?
Cybex Zeno Thru Axle: CYBEX instructs buyers to print its measuring template at actual size on A4 paper, then compare thread pitch, length and diameter. Correct selection requires matching the existing bicycle axle’s diameter, length and thread pitch. The replacement axle is incompatible if its threads do not match those of the removed axle. Thule thru axle Shimano (M12 x 1.5): Correct fit depends on the original axle's brand, diameter, length, shape, and thread pitch. THULE thru axle Maxle (M12 x 1.75): Maxle part 20100799 fits a 167–192 mm axle range, has a 212 mm overall length and M12 x 1.75 thread pitch, and uses bolt installation.
| Product | Why | Measuring guidance | Length and thread pitch | Fit requirement |
|---|---|---|---|---|
| 1. Cybex Zeno Thru Axle sold by anbbaby.com | CYBEX instructs buyers to print its measuring template at actual size on A4 paper, then compare thread pitch, length and diameter. | CYBEX instructs buyers to print its measuring template at actual size on A4 paper, then compare thread pitch, length and diameter. manual | CYBEX’s guide lists 154–172 mm M12 x 1.0, 169–184 mm M12 x 1.0, 166–178 mm M12 x 1.5 and 168–180 mm M12 x 1.75; the retailer instead lists 154–172 mm, 171–183 mm, 159–178 mm and 174–180 mm respectively, so the sources disagree on three length ranges. manual | Correct selection requires matching the existing bicycle axle’s diameter, length and thread pitch. manual |
| 2. THULE thru axle Shimano (M12 x 1.5) sold by anbbaby.com | Correct fit depends on the original axle's brand, diameter, length, shape, and thread pitch. | - | The listed M12 x 1.5 variants are 159 or 165 mm, 170 mm, 172 or 178 mm, 209 mm, and 229 mm. listing | The adapter is for connecting a bike trailer to a bicycle equipped with a Shimano 12 mm rear axle. guide |
| 3. THULE thru axle Maxle (M12 x 1.75) sold by anbbaby.com | Maxle part 20100799 fits a 167–192 mm axle range, has a 212 mm overall length and M12 x 1.75 thread pitch, and uses bolt installation. | - | Maxle part 20110731 fits 174 or 180 mm axles, has a 207 mm overall length and M12 x 1.75 thread pitch, and uses nut installation. manual | The adapter is for connecting a bike trailer to a bicycle with a Maxle 12 mm rear axle. guide |
Also cited in the text
- THULE thru axle Maxle (M12 x 1.75), 167–192 mm fit: Maxle part 20100799 fits a 167–192 mm axle range, has a 212 mm overall length and M12 x 1.75 thread pitch, and uses bolt installation. manual
- Cybex Zeno Thru Axle, Thread warning: The replacement axle is incompatible if its threads do not match those of the removed axle. manual
- THULE thru axle Shimano (M12 x 1.5), fit selection: Correct fit depends on the original axle's brand, diameter, length, shape, and thread pitch. manual
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Written 2026-10-16T12:13:16.302Z.
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