How did we determine that Zipp wheels are not compatible with any indoor trainers that attach to the front wheel or tire during use while the rear wheel is unsecured, and what did we find?

Zipp’s engineering and product management teams have determined that using trainers that attach to the front rim or tire of the bike while the rear of the bike remains unsecured can cause significant flexing outside of normal intended use. Zipp wheels are not designed to withstand repeated high loads applied to the side of the rim and concentrated in the same area over long periods. While riding on the road, wheel loads get applied in a different manner and are distributed around the wheel due to spinning.