Depending on your bike:
– Bearings.
– Chain and cassette.
– Shifter cables.
So not a huge cost. Say £200-£250?
I’m on the rigid SS for everything except the 4-6 races I’ll enter through the autumn/winter and another 4-6 rides where I need a bigger bike to have fun. Even then, I suspect an HT with more travel will be more than capable of handling it.
This year I’m riding the HT and the rigid solely. Hopefully will translate to being faster in the spring!