Well 45+ gets me into this thread. I'll be 69 yrs old in a month and have been riding my Fuji Obey Track Bike for two full seasons. I can say without reservation that i enjoy the SS bike riding very much. Easily over 2800 miles this last season and will ride thru out the winter on this bike. I do not race the bike but didn't purchase it to do so. There are many moments that the bike " makes me feel younger" and i know it definately makes me a stronger rider.