I've just bought a 2008 270 that I intend using for technical trail riding in the french alps and general playing. The bike could use fresh chain and sprockets soon, so I was wondering what gearing people might suggest? On the 11-41 setup it has now first feels really low and I'm not sure how much I'd use it. Anyway, if there is some accepted wisdom on what might work well I'd be pleased to hear it. I'm lucky enough to also have a spare rear weheel, so if I can find 2 sprocket combo's that can work on the same chain length but give 2 different sets of gearing, that might be good as a reasonably quick way to go from lower to higher gearing and back again.