C
Chalo
Guest
Hi y'all,
I was riding around town yesterday on my 29er equipped with a SRAM
Spectro S7 gearhub and 40/21 primary gearing. As I came to a short,
steep uphill section of gravel alley, I downshifted to first gear and
turned up my effort to climb the rise without having to get off and
push.
My hub said "pop!" and my pedals sagged out from underneath me. A
quick triage operation established that instead of the usual
[1-2-3-4-5-6-7] shift sequence, I was instead getting [N-N-
N-4-4-4-4]. After the "event", there was no unusual noise, crunching,
or balkiness in the hub-- just smooth freewheeling in both directions
for gears 1-3 and normal 1:1 single-speed drive in gears 4-7.
I hope to take apart the hub and do a postmortem soon. But until
then, does anybody have a guess what let go inside, and whether it's a
reasonably fixable issue?
Chalo
I was riding around town yesterday on my 29er equipped with a SRAM
Spectro S7 gearhub and 40/21 primary gearing. As I came to a short,
steep uphill section of gravel alley, I downshifted to first gear and
turned up my effort to climb the rise without having to get off and
push.
My hub said "pop!" and my pedals sagged out from underneath me. A
quick triage operation established that instead of the usual
[1-2-3-4-5-6-7] shift sequence, I was instead getting [N-N-
N-4-4-4-4]. After the "event", there was no unusual noise, crunching,
or balkiness in the hub-- just smooth freewheeling in both directions
for gears 1-3 and normal 1:1 single-speed drive in gears 4-7.
I hope to take apart the hub and do a postmortem soon. But until
then, does anybody have a guess what let go inside, and whether it's a
reasonably fixable issue?
Chalo