A story: I have some fitter friends that I sometimes ride with, they have to wait at the top of every hill for me. I'm about 240 right now, they're "regular-size", fairly fit guys, maybe in the 170-190 range.

One of them told me yesterday he was riding with a group, and there was this amazing rider who could climb hills like nobody he's ever seen before. Eventually my friend also got to the top and was talking to this guy, "Wow, you sure are fast on hills. Maybe if I lost 10-20 pounds, I could be at a point where I could, maybe not keep up with you, but at least keep you in my sights! So how much do you weigh anyways?"

Answer: 130.

Yeesh! That's barely more than half of me.

I challenged my friends to strap on a backpack with 50lb of rocks and then we'll all go ride some hills together. I wonder how that would work out? So far I haven't been able to convince them to try.