CRR question --iSport

[BuddyBuscemi]

Hello
I inadvertantly cleared my CRR value(-18) on my iSport, and I cannot reset it to show a negative value.
Could somone help me please?

Thanks in Advance
Buddy B

[lorduintah]

Cannot help you with setting a negative value - it is an undefined situation - that is - negative Crr are not plausible. You will hav eto do coast downs again - hopefully getting a positive value.

Tom

[R Mc]

Agree . . . negative rolling resistance MIGHT be a characteristic of a perpetual motion machine, but can not be a characteristic of a bicycle . . . since such a phenomenon would be better described as "rolling assistance."

Can you imagine the ad campaign? "The Michelin Boostium has been proven in lab tests to assist your forward momentum. Only $300 per tire."

[Velocomp]

You should set your Crr to 55, then do both tilt and wind offset calibrations then do a new Cal Ride. This will give you a better (and correct) frictional drag.

[BuddyBuscemi]

Velocomp

Thanks!!
Buddy B