Using older, spiderless cranks for a fixed gear conversion?
I'm currently converting a schwinn le tour 3 which was previously a single speed to a fixed.
The original cranks are the type where the chainring is directly attached to the back/base of the crank arm rather than a spider. The chainring seems to be attached to the crank by a not so sturdy method, which makes me imagine it could become detached rather easily if put under the strain of a fixed gear.
Anyone have any experience using this type of crank for a fixed gear?
Also, I've looked into purchasing new cranks for this very reason but I don't know how to determine whether the spindle/bb would accept JIS or ISO crank arms? The cranks are labeled simply as 'le tour' with 'japan' stamped on the back.
The spindle has a threaded section jutting out of the end of the tapered section rather than being internal, which seems against the norm? I'd prefer not to buy a new bottom bracket if possible considering I'm on a budget and the current one works fine aside.
Any help would be greatly appreciated.