Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Unfortunately the manufacturer's website, and google don't appear to hold this information. The only thing I've found is that the hubs are aluminium which doesn't really help.

Is there a common size of wrench? If I get the size wrong I can always send it back but I'm guessing people who deal with road bikes a lot will know that there's a common set of sizes.

Any suggestions? :)

share|improve this question
17, 15 and 13mm are common sizes. No idea about this wheel though. If you've some callipers you could measure the cone. – alex Jul 9 '13 at 2:37
Just buy a set -- not much more than a single wrench, and the front will probably use a different size from the rear anyway. – Daniel R Hicks Jul 9 '13 at 11:09
Try to find one of these: it has 4 sizes (IIRC, 14, 15, 16 and 17mm) on a single wrench: – Mladen Jablanović Jul 9 '13 at 11:55
up vote 3 down vote accepted

I had a 2008 version of the 1.5 bike and the rear wheel took a 15mm cone wrench.

It's possible that Trek changed this, but I think 15mm is a good bet.

I agree with @alex; anything other than 13, 15, or 17 would be considered uncommon.

share|improve this answer
It was indeed 15mm. – John Hunt Jul 31 '13 at 8:11

According to the Q&A section on Wiggle I need a 15 / 16mm wrench:

share|improve this answer
This was the correct size in practice. – John Hunt Jul 31 '13 at 8:11

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.