Evelo Aurora Limited is a very good bike with CVT/Belt drive and I love riding mine and have already put 200 miles on it in just a few weeks. At 70+ years I like the fully automatic transmission with out the hassle of changing gears with a cassette. Just set your cadence and go! The class 2 throttle for get a start off the line or if you hit a steep hill. Evelo customer support is outstanding in answering all questions I have had about my bike.