Manual Wheel Setting for Edge 305


New Member
Jul 14, 2006
I recently bought/installed a Garmin Edge 305, and I do a lot of indoor riding on the trainer. I know where to change it so that it uses the rear wheel sensor instead of the gps for speed/distance --- but, I don't know what numbers to use for the manual tire selection. I've looked through the book and either I've overlooked it several times, or it just isn't in there.

Can someone tell me what number to put there? My tires are 700C x 23.