- Box Two freewheels combine durability with lightning-fast engagement
- - Featuring nine super durable pawls and available in 16, 17 or 18 tooth
- - To install, use tool designed for single speed freewheels with four notches that are approximately 32mm across measured inside to inside and 40mm outside to outside
- - Fits 1.375 x 24 TPI hub thread
- - Fits 1/8" or 3/32" chain