Does he have a hobby/interest he'd like to include you in but you've never participated in?

Maybe if you join in on something he likes he would be more interested in doing the same? I know my thing is cycling and my guys thing is kayaking. We each have started participating in the others sport but only occasionally (1 or 2x's a month) and those times are really special and fun.

I agree with everyone else. Don't browbeat him just because he has a cheap bike and "can" ride. Cheap bikes and small seats suck. If it's not comfortable, I won't ride either.

Plus, we need our own identities and stuff to do. Maybe you could get g/f's to ride with you instead?