Today I finally got a couple of Urban Cruisers I ordered a while ago.
For the last 7 months I have been commuting on a very heavy cheap 29er mountain bike. These new ones feel incredibly light by comparison, comfortable, rolled beautifully, brakes that actually work, and on my test drive I was flying around, but all in all it was a bit unsatisfying, it was just too easy and it felt 'twitchy'. Skinnier road tyres, lighter frame.
Should I switch bikes every so often to build up my leg strength faster, or will these new bikes do the same thing anyway? I only ride on the road.
More importantly, could I actually lose some leg strength going with the lighter bikes (I didn't feel I got anywhere near the workout I usually do)? Or am I just nitpicking because I'm not used to them?