Adaptation: generally applicable to folding bike / BMX / electric car / mountain bike.
EVOSID Lightweight Bike Seat Post Clamp, Aluminium Alloy Seat Tube Clip Quick Release Bicycle Seatpost Tube Tightener Clip 31.8mm /34.9mm for Mountain, Road, Folding, DH, MTB (Rose red, 34.9mm)
TRIWONDER Bike Seat Post 25.4 27.2 28.6 30.4 30.9 31.6mm Aluminum Alloy 400mm Bicycle SeatPost Tube for MTB Mountain Road Bike (Black, 28.6 x 400mm)
Aluminium Bicycle Seatpost Road Mountain Bike MTB Seat Post Tube 30.9mm/31.6mm
Aluminium Bicycle Seatpost Road Mountain Bike MTB Seat Post Tube 31.6mm UK
Azarxis Bike Seat Post Clamp Aluminum Alloy Quick Release Bicycle Seatpost Tube Clip 28.6mm 31.8mm 34.9mm for Mountain, Road, Fixie, Track, Folding, DH, MTB, BMX Bikes Gear (Black - 28.6mm)
TRIWONDER Bike Seat Post 27.2 30.9 31.6mm Aluminum Alloy 400mm Bicycle SeatPost Tube for Mountain Road Bike MTB (Black, 27.2 x 400mm)
