Hello!
I have this persistent enigmatic problem that has defeated two bike shops and me! I would be highly grateful for any input.
My rear derailleur (SRAM Rival 11) will happily shift into the lowest gear (largest cog), but it won’t shift to the next largest one unless I shift two or three gears up.
Visually it just looks like the derailleur isn’t being given enough slack when I shift up from the lowest gear.
I have replaced the inner, the outer, and removed all internal cable guide sleeves in a bid to minimise cable friction, but this theory doesn’t really make sense because the derailleur tension should be highest in the lowest gear anyway and it shifts into the highest gear no problem.
I’ve taken the casing off the shifter to check that the cable is being pulled when it shifts down and indeed it is.
The limit screw is certainly adjusted properly, and if I move the limit any more outboard I can’t shift into the largest cog.
Mech hanger and derailleur look fine.
The bike is 1 a 2019 Giant TCX (not that I think this might be relevant!).
Any wild suggestions welcomed, this is driving me nuts!!!