Box Two Freewheels combine durability with lightning-fast engagement. They feature nine, super durable pawls and are available in one of three choices — 16, 17 or 18 teeth.

To install, use the Park Tools FR-6 or other installation tool designed for single speed freewheels with four notches that are approximately 32mm across measured inside to inside and 40mm outside to outside.

FEATURES

• 1/8th or 3/32 Chain Compatible
• ED Black Protection
• 108 Points of Engagement
• 9 Pawls Engagement System
• Heat-Treated Chromoly