Aluminum Seat Collar for 29.8mm External Butt Seat tubes
- Black finish
- The Aluminum seat collar is used on 29.8mm external butt seat tubes found in steel tube sets made by Columbus and Nova
- It allows you to have a replaceable part since it is not welded or brazed to the seat tube. This is a great benefit for builders to prevent frame damage from over-tightening by overzealous customers.