if those are 75's. the rear bolt is fixed into da crank arms. it is not supposed to come out. which is why the rear bolts are recessed
like so
http://www.tracksupermarket.com/blog/wp-content/uploads/2010/11/s75cranks_l.jpg
@31trum started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
if those are 75's.
the rear bolt is fixed into da crank arms.
it is not supposed to come out.
which is why the rear bolts are recessed
like so
http://www.tracksupermarket.com/blog/wp-content/uploads/2010/11/s75cranks_l.jpg