LIGHTWEIGHT Seatpost Adapter
If you own a frameset and you want to use a smaller diameter seatpost this is exactly what you need.
 
Shim transforms a 30.9mm ID seatube to use a more common 27.2mm seatpost.
Shim transforms a 32.4mm ID seatube to use a more common 27.2mm seatpost.
 
One piece CNC machined from Aluminum alloy
Anodized finish to prevent corrosion
 
30.9-27.2mm; Black
Length: 90mm
Weight: 36g
32.4-27.2mm: Silver
Length: 95mm
Weight: 68g