Odyssey Gyro GTX-S (Black) Color:Black (Bearing unit only) OPTIS and tire have the

OPTIS and tire have the same pressure: OPTIS will begin to collapse if the pressure in the tire is greater than the insert’s

Steerer Length: 157mm

Be sure to always keep the OPTIS insert at least 5 PSI higher than the tire’s pressure

The 9t driver is similar to what you'd find on a cassette hub however it has sprung down pawls

6061-T6 top loader stem

Odyssey Gyro GTX-S (Black) Color:Black (Bearing unit only) OPTIS and tire have theOdyssey's original dual cable detangler system has been the industry standard since day one. Odyssey has been making the Gyro since 1986 and constantly improving it along the way. The GTX S is sold as a bearing unit only. It's the perfect upgrade to the G3 Gyro. Features Precision sealed mechanism bearing 6061 T6 Aluminum Low 17mm stack height