Amazon.com: Aluminum Alloy Bicycle Seat Post Clamp Mountain Bike Seatpost Accessory for 30.4/30.8/31.6mm seat Post (34.9mmBlack),34.9mm Bike Seatpost Clamp, 34.9mm Bike Seatpost Clamp, Aluminum Alloy Bicycl : Sports & Outdoors
Unique Bargains 31.8 to 34.9mm Bike Seat Post Tube Adapter Seatpost Reducing Sleeve Shim Adapter Aluminium Alloy Black - Walmart.com
KCNC SEPRO Lite AL75 Seatpost 34.9mm | BIKE24
Prolite CNC Bicycle Seat Clamp 34.9mm for 31.6mm Seat Post - 3252-34.9
Box Helix Seat Post Clamp - 34.9mm - Blue - BMXGuru.com / C&W Cycle
ONIPAX Bicycle Seat Post Clamp Aluminum Alloy 31.8MM/34.9MM Black – Onipaxbiketw