You can know the specifications of the reducer sleeve.
Wolf Tooth | Seat Post Clamp 34.9mm | Black | Precision-Engineered Bike Seat Clamp to securely Hold Your seat Post - Lightweight 6061 Aluminium Bike Seat Post Clamp
Bike Seat Post Adapter Shim Seat Post Adapter Bicycle Seat Tube Conversion Sleeve 27.2mm to 30.9mm Aluminum Alloy for Road Mountain Bike
Air Seat 25 Saddle Suspension for Bicycle suspension seat post,bicycle accessories ebike seat post, comfort suspension for men,the ultimate solution to the saddle sore (Silver, L)
Air Seat 25 suspension seat post,bicycle accessories ebike seat post, bike accessories, the ultimate solution to the saddle sore (Black, L)
Albedel Set of 9 Sizes 100mm Length Bike Seat Post Adapter Shim Seat Post Adapter Bicycle Seat Tube Conversion Sleeve 22.2~33.9mm to 25.4~36mm Aluminum Alloy for Road Mountain Bike MTB
Air Seat 25 suspension seat post,bicycle accessories ebike seat post, comfort suspension for men,bike accessories, the ultimate solution to the saddle sore (Black, M)
