I have a Felt F85 racing bike with a 3 ring chainset. smallest is 30T. I got this bike after a year on a Mountain Bike with road tyres. While it is great in many ways I am not as happy with it going up a steep hill as I was with the Mountain Bike. I tend to be happy chucking revs at the hill but am old and have dodgy knees so do not stand up in the pedals for hills. My question is, how can I best get the Felt to be more like the mountain bike for a hill? Can I change the small ring for something smaller? or can I change the chainset or all the rings to go down a bit in size? (Perhaps swap for a mountain bike range??) If I do mess around with the rings or chainset will I still be ok with the gear change or will I mess that up? I am thinking with smaller rings it may need to be moves closer. I am fairly OK on mechanical things but have not had much experience with bikes. I got the Felt second hand and so do not know much about it. Taking it apart today it has a square stem that the chainset fits to. and five allen bolts to hold the bigger two rings in place and then a second set of five to hold the smaller ring. From a spec I have found I think I have: Crankset Felt aluminum, 30/42/52 teeth Front Derailleur Shimano Sora Triple, clamp-on I guess the other way is make the back ones bigger rather than the front ones smaller. I am happy to lose a bit of the top end (dropping top gear down a bit) as I rarely get up to that sort of speed. I use it for leisure cycling and plan a 100 mile run but nothing against the clock. Has anyone got any advice on the best way to do this????