I've held on to this for almost 20 years now so I'll share it with you!!

When I was 12 years old, I liked riding my bike around the small town where we lived. It was quite a rural area and I'd often go on my own for this ride that I now know to be about 7.5 km or 5 miles. (Sometimes it would be 6 miles because I'd detour in front of the house of some guy I had a big crush on. ) Sometimes my mom would join me. Now be aware that my mom has always worked physically and walked A LOT and FAST, so she was reasonably fit, but she underestimates herself in all things and fitness is one of those. So on those bike rides, she'd be much stronger than me and could leave me in the dust, then say things like "Didn't you spend the whole summer riding your bike? Aren't you supposed to be fit?" or "How come am fitter than you young thing?", stuff not unlike what your DH said to you on that ride. She didn't mean it badly I think, she was mostly teasing and above all, in a weird way, expressing how happy she was not to be the one left behind. It always made me feel quite bad and it added to my clear sense that I was not made to be an athlete. It took me 15 years, and another new bike, to discover my inner-athlete and learn to love sports.

So the bottom line is that maybe your DH has felt bad about himself all winter, especially when you were going spinning and he was not. Sometimes when one partner discovers a new passion, the other might feel funny about it. Maybe he thought you would smoke him on the bike, and his teasing was his way of expressing his relief at not being so unfit after all.

I don't know how clear this (long) story is, but in any case it doesn't make his behaviour acceptable, and it could be useful to tell him you felt hurt, but also to be aware that he might have felt hurt too, for reasons that are outside of your control, and that this was his not-so-funny way to cope. (I also like the idea of feeding him his handlebar tape, but that should be last recourse!!! )

All things being equal, most men are much stronger than women on the bike, which seems to be the perfect machine to demultiply their strength. It's possible to find ways to ride together - compromise is the name of the game - but it's not always the best thing to do for the two partner's mental sanity.