I’m building a split-frame touring bike from scratch and want to use a belt-driven internal gear hub (no engine) using one of these front sprockets from Gates.
Main question: What crankset still exists - either as a complete set or individual parts - could fit a 5-bolt 130mm BCD or a 4-bolt 104mm BCD sprocket? I'll worry about belt length and tooth count later.
These dimensions seemed to be a standard size at one time, but everything I find in 2021 is either out-of-stock, an off-brand, or for kids. This post suggests that cross-compatibility is a thing of the past. The reps at Gates assure me it’s the standard.
I could only find the Sugino RD2 Single Speed Cranksets and Brompton cranks but these don’t look like they can take a beating. The SRAM S300 1.1 GXP Track Crankset and Gate cranksets require a GXP BB, which limits me in the future.
Side quest-ions (optional)
- Is there a brand that isn’t a hegemony (Shimano), off-brand, or $400?
- Is there a setup where components could be replaced in a developing country were something to break? (i.e., not specific to a series)
- Sheldon Brown suggests that having the spiders+crank arms as onepiece is preferred
- Any tips on knowing if the chainring is detachable from a given
- If going with a spider, what should I look for in crank arm compatibility?