Rear U-Brake

Assembly

No photo yet. Seen one of these? Suggest a photo.

Dual-pivot alloy U-brake mounting to the seatstay bridge, squeezing the rear rim for race-legal stopping.

Direct parts	3
Total parts	5
Used in	1 assembly
Class	Assembly

Report a problem with this BOM

Dual-pivot alloy U-brake mounting to the seatstay bridge, squeezing the rear rim for race-legal stopping. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Rear U-Brake parts and their functions

3 top-level parts · 5 parts in total · full bill of materials below

Rear U-Brake parts diagram: 1 brake arm, 2 brake return spring, 3 brake pad set. 5 parts in 3 top-level items. — Rear U-Brake parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Brake Arm	2×	Forged alloy arm pivoting on a frame post and carrying the brake pad toward the rim.
2	Brake Return Spring	2×	Coil spring returning each brake arm off the rim when the lever is released.
3	Brake Pad Set	1×	Pair of friction linings bonded to steel backing plates that press on the brake disc to slow the wheel.

3D model

No 3D model yet. Have a CAD file of this? Add a 3D model. STL renders right on this page; STEP, FreeCAD, and OpenSCAD sources are welcome too (openly licensed, like all 3D models on BOMwiki).

Build & assembly graph

expand / collapse · shared sub-assemblies converge · links to related products · est. labour

product / assembly shared across products atomic part related product

Tap an assembly to expand/collapse · tap a part to open it · use “Open page” for any node · drag to pan, scroll to zoom.

Bill of materials for Rear U-Brake

3 top-level lines · 3 rows shown · 5 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Brake Arm	bmx-race-bike-brake-arm	2×	2	·	part
2	Brake Return Spring	bmx-race-bike-brake-spring	2×	2	·	part
3	Brake Pad Set	brake-pad-set	1×	1	·	part

Something wrong in this list? Report a problem with this BOM.

Where the rear u-brake is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Bicycles & Cycling 1 BMX Race Bike

Used in 1 assembly

Brake System

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳Foxconn foxconn.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Flex (Singapore) flex.com ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks
🇮🇳Dixon Technologies dixoninfo.com ↗	Noida, IN	Electronics contract mfg	1,000 pcs	6–10 wks
🇨🇳BYD Electronics bydelectronic.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Venture Corp venture.com.sg ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks