Originally Posted by Hcolvin1
Can someone tell me if the cranks on a Trek 400 have 9/16 threaded petal holes . I am thinking about buy this bike but wish to replace the petals with a petal that has SPD cleats. I understand that there currently are two "sizes" of petal threads 1/2 and 9/16. But I don't know what the standard size was when this bike was marketed. Mid 80's I think.
Thanks
If they are stock cranks, they'll be 9/16". 1/2" were predominantly on the American 1 piece cranks, and there was at least one odd sized French pedal threading. So, unless someone did something funny to the cranks, they're 9/16".
EDIT: Beat to the punch.