Crank Clearance when bolts are torqued- single speed bike, help appreciated
my friend bought Sugino grand mightys for his urban outfitters singlespeed bike (dont ask me why -_-)
he asked me to install it because i have the tools.
i have a slight problem that could get bigger.
i installed the bottom bracket, i seated the cranks and torqued in the bolts to +/- 25 ft lbs
i rode it around a bit to test it out my work....not so good, the drive side arm was kissing the stay everytime it went up.
i sat down with the bike, cried a bit, then started over.
i double checked the bottom bracket, reinstalled it. reseated the cranks but this time i didnt push the drive crank all the way in with the wrench (so the drive side is not torque +/- 25 ft lbs). and WAH LAH, the crank clears the chainstay.
my question is: Is there anyway for me to torque the crank around 25 ftlbs without pushing it all through the spindle? i need about 1mm or 1.5mm of space for the crank to clear the stay.
thank you for reading, and any help/comments appreciated.
Yes, there are a few approaches to take. A spacer under the fixed cup of the BB is one - that'll move the cranks over a little to the right, so be sure you have enough clearance on the left side crank before doing this. A longer spindle would be a second method but requires that you're able to find one of the right length.
Our tandem had a similar problem, but it was on the left side and the crank rubbed on the lockring for the adjustable cup. Eager to get the bike up and running without having to wait for yet another part, I cut a shim out of a soda can and put it around the square taper of the spindle on the NDS. Tightened everything down and that gave sufficient clearance. Admittedly it's not the preferred solution, but it has held up fine for over 30 years and quite a few repackings of the BB bearings. Of course when/if the spindle ever wears out I'll try to replace it with one that's longer on the left side (which isn't completely NDS since the captain's drive power is on that side).