RISK Parts K87 Mountain/Road Bike Seatpost Clamp with Quick Release Seat Tube Clamp Ring with Cable guide 31.8/34.9mm

The RISK K87 Seatpost Clamp is designed for mountain bikes, road bikes, urban bikes, and other bicycles requiring a secure and reliable seatpost locking solution. Made from aluminum alloy with stainless steel hardware, it offers a lightweight yet durable construction for stable seatpost fixation.

Available in 31.8mm and 34.9mm sizes, the K87 clamp fits a wide range of bicycle frames. It is offered in black, red, and blue, with two style options: standard seatpost clamp or seatpost clamp with detachable cable guide, ideal for bikes using externally routed dropper post cables.

The integrated bolt system provides firm locking performance, while the smooth anodized finish gives the bike a clean and premium look. The optional removable cable guide helps keep external cables organized and improves frame appearance.

Key Features

• Brand: RISK
• Model: K87
• Material: Aluminum alloy clamp with stainless steel bolt
• Available Sizes: 31.8mm / 34.9mm
• Colors: Black / Red / Blue
• Style Options: Standard clamp / Clamp with cable guide
• Recommended Tightening Torque: 5 N·m
• Lightweight Design: Approx. 16g for standard clamp, approx. 22g with cable guide
• Use: Seatpost fixing and optional external dropper cable routing
• Suitable For: MTB, road bikes, urban bikes, folding bikes, and commuter bicycles
• Package: Retail hanging card packaging

Size Guide

• Choose 31.8mm clamp for seatposts marked 27.2mm or 28.6mm
  Note: not suitable for fixed gear bikes in some cases.
• Choose 34.9mm clamp for seatposts marked 30.4mm, 30.8mm, 30.9mm, or 31.6mm

Please confirm your bicycle frame seat tube outer diameter before purchase. The above guide is based on RISK laboratory reference data.