Garmin 910xt can't manually set wheel size

Anyone know how to fix this? I’m pairing with a GSC10 for indoor use and its either auto or manual is blank and unadjustable.

Anyone know how to fix this? I’m pairing with a GSC10 for indoor use and its either auto or manual is blank and unadjustable.

Had the same issue with Edge 500, until I realized that it’s actually in the “Bike Details” section of the menus. Not sure if such a thing exists on 910, but would give it a try. I was able to set each digit to get exactly 2096 for wheel size, and the GSC10 finally started spewing out more reasonable speed numbers on the trainer.

I had the same issue with the 910xt and Garmin support had me do a hard reset. I was then able to set wheel size.

I had the same issue with the 910xt and Garmin support had me do a hard reset. I was then able to set wheel size.

You shouldn’t need to do a hard reset to set the wheel size. Get this - http://static.garmincdn.com/pumac/Forerunner_910XT_OM_EN.pdf and go to Page 19.