CYC Heavy duty drivetrain

We've had the idea of less gears, but with greater strength on the forum and someone finally did it:





Notice that a key feature is oversized low gears You could achieve this without buying anything special, just mixing and matching cogs and going to a bigger front chainring. That will give you some of the benefit of this.

More info: https://www.cycmotor.com/post/unleash-performance-the-cyc-heavy-duty-drivetrain

More important than the sprockets (gears) is the freehub construction.

You can buy or even make sprockets of pretty tough materials in sufficient size ranges, and space them apart however you like (if your shifter/derailer can correctly shift between them). Seems like the ones on this are designed for higher speeds (high gears) rather than more torque (low gears).


So, for the freehub:

does it have an outboard bearing at the end of the freehub spline body and an inboard one at the hub?

is the freehub spline body of as strong a metal as the sprockets?


are the freehub pawls and body machined correctly so that all pawls engage and take torque, rather than just one or two?

how many pawls and body ratchet ramps are there?

is the pawl spring design and material correct to ensure they engage quickly and correctly?

Well they're using a 9 speed chain, so they left all the durability on the table. And they're using, from the look of it, an 8-9-10 speed freehub, which means they're giving away all the wheel strength benefits of narrowing the gear cluster and improving wheel dish. I think it's a gesture in the right direction, but it will fail because they didn't commit to what they thought they were doing.

Make a 5 speed cluster that uses a 1 speed chain and fits on a 7 speed freehub body, and then we'll be reaping some dividends. The way they did it, you might as well use a 9 speed system and lock out some of the bigger sprockets.

I missed the part about a 9 speed chain. Why the hell would you do that..
..now i know why i'm the first person to post about this on ES..

What I would like is bicycle drivetrain and shifting parts that could handle, sustain, and last with a drivetrain that could provide enough torque (from any source) to rip the hub off the spokes trying to startup a heavily loaded heavy-cargo bike or trike from a stop.

(and then build myself wheels that can handle that, too)

(yes, I can already do this with single-speed non-freewheeling parts....but, well, it'd be nice to be able to shift gears higher than the tenth-of-a-mile-per-hour (or less) could get out of a gear ratio that would let *me* pedal-start this situation, without something like a toothed-gear dog-clutch or whatever).