OK, I'm 52, picked up biking again about 1-1/2 years ago. Had both knees replaced in July and have worked myself up to about 175 miles per month on the road. We are buying a house in Chattanooga and I want to start some trail riding. Thinking about a 2x10, and would like some opinions on suitability. I'm riding a compact on my primary road bike, but also have a triple on my back-up road bike. There will be some about town riding in getting to some trails. Just want some opinions.