Theory Trusty Single Bolt Seat Clamp Description:

The Theory Trusty Single Bolt Seat Clamp is an aluminum clamp available in a wide variety of colors and sizes. With sizes common for freestyle, race, and Bike Life, Theory is for everyone!

Specifications:

• 28.6mm: Fits 25.4mm posts
• 31.8mm: Fits 27.2mm posts
• 34.9mm: Fits 31.6-31.8mm posts