I have two wheels and two 11 speeds cassettes. With one combination of cassettes and wheels, shifting is reliable. With the other combination, the position of the cassette relative to the derailleur is clearly incorrect and I get a lot of chain noise and spontaneous shifting.
The parts I have are:
- Giant P-R2 rear wheel
- Shimano 11-34 cassette, CS-HG700-11 (I think)
- Campagnolo Calima C17 rear wheel
- Shimano 11-30 cassette, 105 R7000
Shimano 105 GS long cage rear derailleur
Combination 1 + 2 is what came with the bike, and works fine. When I disassembled it, there was a shim between the largest sprocket on the cassette and the wheel side end-stop on the freehub body.
Combination 3 + 4 also works fine, without a shim, on the same bike without altering the adjustment of the rear derailleur at all.
However. I want to use the old wheel with the new cassette (1 + 4), indoors on a turbo trainer, and the new wheel and the old cassette (3 + 2), on the road.
Neither 1 + 4 or 3 + 2 works satisfactorily with or without the shim - either I can't get the nut thing to engage the threads to hold the cassette on, because the shim pushes the cassette too far out from the wheel, or without the shim the cassette is too close to the wheel and I can't adjust the derailleur such that shifting works with both wheels.
- Should I expect combinations 1 + 4 and 3 + 2 to work?
- Should I need a shim?
- If I do need a shim, is there a particular width or part number I need to look for?
- Am I missing something obvious?