Brompton Seatpost Bumper Cap
Created today
Description
What it's for
A custom TPU end cap for the seatpost of a Brompton folding bike. It acts as a resilient plug to prevent the folded bike from rolling, and pads the ground against scratches when the post is dropped.
Dimensions
- Fitment: Engineered with 30.2 mm ribbed sections for a secure interference fit inside a 29.6 mm seat tube.
- Bumper Pad: 34.5 mm diameter to cleanly cover the 33 mm seatpost rim, featuring a 3 mm solid base section to take impact.
- Core: Deeply hollowed center for weight reduction and necessary wall flexibility, paired with a central pressure-relief hole to ensure clean seating without trapped air popping the plug loose.
Print notes
Intended for flexible materials like TPU. The thin-wall hollow structure allows the ribs to compress inwards on insertion, maintaining outward spring tension to hold the cap firmly in place.
Images
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