Stacyc 90 Degree Gearbox Upgrade foam2 Track your blood oxygen saturation

Track your blood oxygen saturation while you’re awake or asleep3

Ergonomic grooves on protectors for optimized movement and comfort

The all-new removable neck roll allows easy and convenient cleaning of the helmet

And thanks to a UV-resistant powder coat finish

especially when you're in reverse and you can't see what's directly behind you

Stacyc 90 Degree Gearbox Upgrade foam2 Track your blood oxygen saturationThe 90 Deg Gearbox Upgrade kit offers machined gears with larger teeth giving them deeper engagement and more surface area, in turn making them stronger. Perfect for more "aggressive" riders. Fits 12 16eDrive models only.