How to choose the seat tube clamp. Here're two ways to go. Buy corresponding.
Drahtesel Bicycle Saddle Clamp Quick Release Seat Post Clamp Saddle Clamp Quick Release 31.8 mm 34.9 mm for MTB and Road Bike
Mimoke Bicycle Saddle Clamp Quick Release Seat Post Saddle Clamp Quick Release 31.8 mm 34.9 mm for MTB and Road Bike (Gold, 31.8 mm)
sourcing map Bike Seat Post Clamp 31.8mm Bicycle Clamp Aluminum Alloy Quick Release Seat Post Collar for Diameter 27.2 to 28.6mm Bicycle Mountain Road Bike Tube, Blue
sourcing map Bike Seat Post Clamp 34.9mm Bicycle Clamp Aluminum Alloy Quick Release Seat Post Collar for Diameter 30.4 to 31.6mm Bicycle Mountain Road Bike Tube, Gold
Bike Seatpost Clamp, Aluminum Alloy Bicycle Quick Release Seat Post Clamp for 25.4mm Seat Post(Black)
sourcing map Bike Seat Post Clamp 34.9mm Bicycle Clamp Aluminum Alloy Quick Release Seat Post Collar for Diameter 30.4 to 31.6mm Bicycle Mountain Road Bike Tube, Red
