Hey guys.. I'm still rather new to these forums (and cycling in general), and I hope this is the right place to ask this question. Please forgive me if I'm mistaken
I just recently started riding together with a friend, and got a little worried thinking he might actually be a bit healthier than me despite my living a much more active and healthy lifestyle. He has a street bike, and I have a (what I thought was good quality) mountain bike, and when we started riding together I noticed he was able to accelerate way faster to me and get to a very high top speed without getting tired.
He has a good old street bike from the '90s with what look like incredibly thin tires to me that he says go up to like 90 psi (?!). My mountain bike tired are 3x the width of his tires, and tell me to inflate to 55psi. My bike also has shocks in the fork and rear, one of those cushy gel seats, and a heck of a lot more gear range.
We switched bikes one day, and he couldn't handle it (suddenly I was going 25mph right off the bat while he couldn't get past 10), so there is obviously something I'm doing wrong.
I have my seat set properly (I think) to where my leg is just a few inches from fully extended when I pedal down, whereas his is set really low even for him, so I don't think that's it.
I'm just so confused. Is it just my super wide, knobby mountain bike tires creating all that resistance (in which case I can just buy some new tires), or is it the whole dynamo of my mountain bike? The wide gear ratios, the rear shock, the cushy seat, the wide handle bars.. am I going to have to get a new bike just to keep up with my friend once he loses some weight?
Thanks in advance to any and all help!!