CNC Machined Aluminum Bike Stems Built to Your Spec
Item Specification
Material ：6061-T6 aluminum (7075-T6 optional)
Process 4-axis CNC machining
Handlebar clamp ：31.8 mm
Steerer clamp ：28.6 mm (1-1/8″ threadless)
Stem length ：90 mm standard; 40-110 mm on request
Angle ±6° standard (±17° optional)
Finish Black anodized;custom colors on request
Bolt hardware steel; titanium optional
Weight ≈138 g at 90 mm (6061-T6)
Clamp-bore tolerance ±0.02 mm
MOQ 50 pcs per model with laser-etched logo
Description
CNC Machined Aluminum Bike Stems Built to Your Spec
This black CNC machined bike stem is milled from forged 6061-T6 aluminum, black anodized for corrosion resistance, and held to a clamp-bore tolerance of ±0.02 mm. Send us your drawing or choose proven standard sizes – 31.8 mm bar clamp, 28.6 mm steerer clamp, lengths from 40 to 110 mm – with low MOQ and factory-direct pricing for bike brands, OEM projects and wholesale buyers.
Why Riders Feel the Difference
- CNC machined from forged 6061-T6 billet. Machining from billet keeps the grain structure intact and both clamp bores concentric, so the stem torques down evenly and stays silent under hard loads.
- ±0.02 mm clamp-bore tolerance. A round, precise bore means full surface contact on your handlebar. You can run the recommended torque with confidence on rough descents instead of over-tightening to stop slip.
- 20 µm black anodized finish. The hard anodic layer locks out corrosion and resists scratches and batch-to-batch color stays consistent – one less thing to QC when you unbox a full order.
- Hardware that matches the machining. Stainless bolts come standard; titanium hardware is optional so your build spec, not the stock room, decides the final weight.
