Drivetrain parts and their functions

6 top-level parts · 13 parts in total · full bill of materials below

#	Part	Qty	What it does
1	Crankset	1×
2	Bottom Bracket 2 parts	1×
3	Chain	1×	Roller chain of linked steel plates and rollers that transmits power between sprockets.
4	Internal Hub Gear 3 parts	1×	3-speed internal gear
5	Shifter	1×
6	Folding Pedal	2×	Folding pedals

3D model

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Build & assembly graph

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Bill of materials for Drivetrain

6 top-level lines · 11 rows shown · 13 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Crankset	folding-bike-crankset	1×	1	·	part
2	Bottom Bracket 2 parts	folding-bike-bottom-bracket	1×	1	3	assembly
2.1	BB Spindle	folding-bike-bb-spindle	1×	1	·	part
2.2	Ball Bearing	ball-bearing	2×	2	·	part
3	Chain	chain	1×	1	·	part
4	Internal Hub Gear 3 parts	folding-bike-internal-hub-gear	1×	1	5	assembly
4.1	Helical Gear Pair	gear-pair	2×	2	·	part
4.2	Ball Bearing	ball-bearing	2×	2	·	part
4.3	Gear Hub Shell	folding-bike-gear-shell	1×	1	·	part
5	Shifter	folding-bike-shifter	1×	1	·	part
6	Folding Pedal	folding-bike-pedal	2×	2	·	part

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Where the drivetrain is used

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

• Bicycles & Cycling 1 Folding Bike

Used in 1 assembly

Folding 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 $0.01–$2. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇮🇳Sundram Fasteners sundram.com ↗	Chennai, IN	Fasteners	10,000 pcs	3–5 wks
🇮🇳Lakshmi Precision Screws lpsindia.com ↗	Rohtak, IN	Fasteners	10,000 pcs	3–5 wks
🇨🇳Suzhou Escort escort-fastener.com ↗	Suzhou, CN	Fasteners	10,000 pcs	3–5 wks
🇨🇳Shanghai Tianbao tbfastener.com ↗	Shanghai, CN	Fasteners	10,000 pcs	3–5 wks
🇮🇳Sterling Tools sterlingtools.in ↗	Faridabad, IN	Fasteners	10,000 pcs	3–5 wks