Just wondering if I’m wasting my time or not. I have a wheel-off indoor trainer (Elite Drivo), but went for the ‘invest everything in a dream bike rather than have two’ option. Therefore, my bike is on and off the trainer a lot in the summer. I have always tended to change the chains over so there’s one chain for the indoor trainer cassette and one for the back wheel cassette. Is this REALLY necessary? This means that if I’m not feeling 100% motivated, it can sometimes put me off training or riding outside if I have to swap them over (which I know only takes a few minutes, but your hands get greasy and it’s just another ‘step’. I know chains wear faster than cassettes anyway, so am I putting an unnecessary barrier between me and training indoors if my bike is off the trainer or vice versa if it’s on it? How much damage/extra wear can it do?
For background, the cassette and chain on the trainer is a Shimano 105, and the back wheel cassette and chain are SRAM Red. Obviously I’m more concerned with wear on the latter given the replacement cost.