Complete units include draw bolt, purge fitting, one brass insert, and all hardware as shown.

• Single heat sink unit compatible with interchangeable brass inserts available in four standard sizes.

  • 27.2mm seatpost

  • 30.9mm seatpost

  • 31.6mm seatpost

  • 29.7mm (1-1/4” x .035" ID tube)

  • 32.9mm (1-3/8” x .035" ID tube)

  • Custom diameter inserts available upon request

• Bottom draw bolt nut allows for quick changes between different size brass heat sink inserts.

• 8 section split brass inserts provide for uniform expansion and heat draw.

• Shallow taper expanding cones spread load evenly across insert for minimal tube distortion.

• Concentric expansion and release provides for easy installation and post-weld release while maintaining a round inside diameter.

• 1/4" NPT thread on top of draw bolt

• Made in USA