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Discussion History

Frame Assembly

Assembly

TIG-welded 6061/7005 aluminum frame with a 20.5-21.0 inch top tube, integrated head tube, removable derailleur-free dropouts, and an oversized down tube for stiffness off the gate. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Frame Assembly parts and their functions

7 top-level parts · 9 parts in total · full bill of materials below
Frame Assembly parts diagram: 1 top tube, 2 down tube, 3 head tube, 4 seat tube, 5 chainstay, 6 rear dropout, 7 bottom bracket shell. 9 parts in 7 top-level items.
Frame Assembly parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Top Tube 1× Butted top rail
2 Down Tube 1× Oversized lower rail
3 Head Tube 1× Integrated headset socket
4 Seat Tube 1× Short seat mast
5 Chainstay 2× Rear triangle stays
6 Rear Dropout 2× Slotted 10 mm rear dropouts
7 Bottom Bracket Shell 1× American/Mid bottom-bracket shell

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

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Bill of materials for Frame Assembly

7 top-level lines · 7 rows shown · 9 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Top Tube bmx-race-bike-top-tube 1× 1 · part
2 Down Tube bmx-race-bike-down-tube 1× 1 · part
3 Head Tube bmx-race-bike-head-tube 1× 1 · part
4 Seat Tube bmx-race-bike-seat-tube 1× 1 · part
5 Chainstay bmx-race-bike-chainstay 2× 2 · part
6 Rear Dropout bmx-race-bike-dropout 2× 2 · part
7 Bottom Bracket Shell bmx-race-bike-bb-shell 1× 1 · part

Where the frame assembly is used

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

Used in 1 assembly

BMX Race Bike

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–$200. How estimates work
VendorHQSpecialtyMOQLead time
🇮🇳Bharat Forge
bharatforge.com ↗ 		Pune, IN Forgings & metal parts 500 pcs 6–10 wks
🇨🇳CITIC Dicastal
dicastal.com ↗ 		Qinhuangdao, CN Aluminium castings & wheels 500 pcs 6–10 wks
🇮🇳Tata AutoComp
tataautocomp.com ↗ 		Pune, IN Auto components 500 pcs 6–10 wks
🇸🇬Beyonics
beyonics.com ↗ 		Singapore Precision metal & mfg 500 pcs 6–10 wks
🇮🇳Sundaram Clayton
sundaram-clayton.com ↗ 		Chennai, IN Die castings 500 pcs 6–10 wks