Newbie Question

Q&A for all things iSport
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Joined: Thu Jul 08, 2010 7:05 pm

Newbie Question

Post by willycs » Thu Aug 12, 2010 12:53 pm

I have had alot of trouble with flats lately. I went through three on one mornings ride. So I went out and bought a real thick (thorn proof) tube (700 x 23). When I got on to ride the next day I noticed during my warm up the iSport displayed 40W while coasting downhill. All I could think to do was to run through the fast start setup. I did that and everything seemed fine. My question is: could the new tube have changed the orientation (tilt) of the front wheel enough to mess up the iSport? If it changed the circumference it would have just affected speed?


Bill Snyder

Velocomp CEO
Posts: 5568
Joined: Fri Jan 11, 2008 9:43 am

Re: Newbie Question

Post by Velocomp » Thu Aug 12, 2010 4:04 pm

You likely need to do a new tilt calibration. Your thicker tire is pointing your bike uphill slightly, causing watts readings.
John Hamann

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