Tell me more ×
Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. It's 100% free, no registration required.
up vote 2 down vote favorite

I am trying to install a front wheel in a bike - the axle of the wheel is threaded, but I have trouble finding out what size thread it is, and what nut can go on this. The size of the thread on the axle is the same as of a 8 mm screw, but a standard M8 nut (with 13 mm hex) does not fit on it. Do bikes have some special kind of nut there?

If I look at the thread, and at a standard M8 screw, the thread on the bike axle is a bit more dense then on the screw, but I am not aware of existence of two kinds of M8 nuts, so far every M8 nut did fit every M8 screw.

share|improve this question

1 Answer

up vote 1 down vote accepted

There's a wide variety of axle diameters and threading.

There is a spiffy table here: http://www.sheldonbrown.com/harris/axles.html that may clear it up for you.

share|improve this answer
Thanks, so it seems like bike axle thread has a pitch of 1 mm, while a standard M8 screw/nut has a pitch 1.25 mm. – miernik Nov 5 '10 at 17:21

Your Answer

 
discard

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.