Originally Posted by 80sMutRider
I'd say repost this one in the Road Cycling forum, you'll probably get more/better/less sarcastic) answers there, maybe.
Yeah, but since the computer is on a track bike, I figured I'd post here... I guess I'll go ask them
Originally Posted by jab
You could start out with the 23c setting in the computer (rolling diameter 2097mm, per Sheldon), and use your GPS to fine-tune it.
My GPS told me I hit 147mph the other day. I'm not really trusting it anymore - that's why I got the computer. The chart that came with it said 2096mm - I doubt it makes much difference, but I just kinda want to know how slow I really am...