I'd have someone check the derailleur hanger adjustment. How many miles are you getting on each cassette? How about chains? Smallest cogs will wear the fastest. If you are riding a lot on the big ring and the smallest cogs, maybe get a bigger big ring that will put your usual pedaling in the middle of the cassette?
Bill S San Diego On Thursday, March 14, 2024 at 9:34:05 AM UTC-7 Vincent Tamer wrote: > Thank you guys. The suntour shifters don't bug me so much as I may have > made it out in the initial post. I was just not sure if they were causing > this wear on the rear cassette or not. I only have a double crank and > rarely cross chain. Usually I'm on the largest toothed chainring on the > front which aligns with the smaller two on the rear. However there may have > been an instance recently where I cross chained that did the damage. I'll > have to take a closer look but this info helps. Thanks! > > On Thursday, March 14, 2024 at 1:41:11 AM UTC-7 Garth wrote: > >> Vinvent, the Sunrace shifters ratcheting is there only as part of the >> tension holding friction mechanism. It was in use well before indexed came >> to be in use. That indexed shifters happen to click once per shift change >> in unrelated to the ratcheting clicks of the friction variety. I've not >> used those shifters in particular, I've only used Sun Tour Power ratchets >> and other pure friction shifters. My best "advice" for those Sunrace >> shifters is to forget about the clicks altogther as *they are not >> designed for one click per gear shift.* Just adjust the lever by feel >> and sound of the cogs. If you've never used friction shifters before this I >> can see how the clicking may appear confusing if mistaking the friction >> ratcheting sound with indexing clicks, but they're two distinctly different >> mechanisms. Some readers here have ended up replacing those particular >> Sunrace shifters with a more normal ratcheting friction shifters on the >> outside, like the Riv Silver or Microshift or vintage Sun Tour. >> >> The grinding and wear of the two smallest cogs appears from varying >> angles of the chain as you use a given ring with a given cog. It's called >> "cross-chaining". For example, riding in the smallest ring of triple crank >> like yours and the smallest cogs of the cassette is asking the chain to >> flex laterally to angles past their limits of efficiency. Even the middle >> ring and smallest two cogs has a fair amount of friction from the angles, >> depending on the chainline(how far the center-rings are from the center of >> the seat tube). Hence, you'll hear and feel what you describe and will wear >> the cogs down faster than usual if consistently ridden that way. >> >> Here's cross-chaing explained : >> https://wickwerks.com/support/crosschaining/ >> On Wednesday, March 13, 2024 at 11:40:52 PM UTC-4 Vincent Tamer wrote: >> >>> I have an on going issue with my friction shifting setup on my 2016 >>> complete Clem. >>> >>> I believe this will be my third cassette replacement now. Each time the >>> two smallest cogs are damaged/stripped for some reason, so that when I >>> pedal there is some crunching & ghost shifting. I cannot pedal with full >>> force on the first two gears. >>> >>> I’ve had issues with this since day one and I have a feeling it is due >>> to the 2016 complete clem’s shifting setup even though I’ve had it adjusted >>> and have explained to two different bike technicians. >>> >>> The shifter setup is odd, Riv even commented on how it was a little >>> strange in the Clem intro Pdf that was floating around for the longest time >>> (cannot find it now). I'm hoping someone knows what I'm talking about! >>> >>> These suntour shifters are set up in a reverse position and that they >>> have some kind of ratcheting mech in them. The clicks don’t always coincide >>> with a shift and maybe that has created some bad friction shifting form on >>> my part. Outside of that I’m at a loss for why I am having issues with >>> stripped cogs. >>> >>> I’m considering switching to an indexed set up even though I don’t want >>> to but before I do, does any one have any wisdom they can shed on this >>> situation? Thank you! >>> >>> Pics are attached, of the whole bike (for fun) and of the shifter. I'll >>> grab some shots of the gears as well when I can.[image: >>> DSCF7718_sml.jpg][image: shifter.jpg] >>> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/dc7f616b-7c46-44bf-b4ed-a2e23eb88b38n%40googlegroups.com.
