I didn't want to hijack jppe thread, so I thought I better start my own. I looked at Sheldons way of figuring out the gears until my eyes started to glaze up. I got to where I could figure how many inches I could go with one turn of the cranks, but I still didn't know how to calculate the speed. I'll have to dig into it more.
I was wondering how much speed I lost going from 28mm tire to a 32mm tire on a 700cm wheel, with 175mm cranks. I like the differenence as far as comfort goes, but I was wondering how much speed I lost changing over to the larger tires.I added a rack and trekking bars so that probably be a factor as well. I'm waiting for a different stem adjuster so I can get more aero-dynamic and get some weight off my hands to help with speed and comfort as well.
Now if I was in shape to do this, how fast could I go if I had no wind and no grades. Not just me, anybody, a good sprinter or whatever. I know mine would be different because of my weight and power of my legs. I'm talking about someone in top physical condition with all the conditions above, being in 48 up front and 11 in the back, how fast can this person get the bike going.