STONE 144 BCD Fixed Gear Chainring 60T–72T: 5mm AL7075-T651 CNC Single Speed Chainwheel for Track & Fixie Bikes
The STONE BCD144 Fixed Gear Chainring is built for track bikes, fixed gear bikes, and riders who demand high-power performance. Precision-machined from high-strength AL7075-T651 aluminum alloy, it delivers the stiffness, durability, and accuracy that professional riders rely on.
Its 5mm thick body provides exceptional lateral rigidity for efficient power transfer during sprints and high-intensity efforts. CNC machining ensures consistent tooth profiles, while the anodized surface treatment adds wear resistance, corrosion protection, and a premium finish.
Key Specifications
- Brand: STONE / STONEDW
- Model: BCD144W5
- BCD: 144mm
- Bolt holes: 5-bolt design
- Material: AL7075-T651 aluminum alloy
- Thickness: 5mm, enhanced for high-power riders (ordinary 144 BCD version is 4mm)
- Process: CNC machined
- Surface treatment: Anodized black
- Chain compatibility: Single speed chain only
- Chain requirement: 1/2″ x 1/8″
- Application: Fixed gear bike / track bike
- Teeth options: 60T–72T
Teeth Size Options
The chainring is available in 13 tooth sizes from 60T to 72T, letting you fine-tune your gear ratio for track racing, fixed gear riding, or high-speed training. Each size is CNC machined to the same 5mm thick, 144mm BCD specification. Refer to the table below for outer diameter, weight, and SKU details.
| Teeth | Outer Diameter | Weight | SKU |
|---|---|---|---|
| 60T | 249mm | 222.3g | BCD144-60T-W5 |
| 61T | 252.7mm | 230.2g | BCD144-61T-W5 |
| 62T | 257mm | 238.2g | BCD144-62T-W5 |
| 63T | 261mm | 246.9g | BCD144-63T-W5 |
| 64T | 265mm | 255.9g | BCD144-64T-W5 |
| 65T | 269mm | 276.5g | BCD144-65T-W5 |
| 66T | 273mm | 285.3g | BCD144-66T-W5 |
| 67T | 277mm | 300g | BCD144-67T-W5 |
| 68T | 281mm | 308.6g | BCD144-68T-W5 |
| 69T | 285mm | 318.5g | BCD144-69T-W5 |
| 70T | 289mm | 327.8g | BCD144-70T-W5 |
| 71T | 293mm | 340.2g | BCD144-71T-W5 |
| 72T | 297mm | 349.8g | BCD144-72T-W5 |
Product Advantages
High-Strength AL7075-T651 Aluminum
Made from premium 7075-T651 aluminum alloy, offering high strength, high hardness, and excellent durability.
5mm Thick Design
The thicker chainring body improves lateral stiffness and supports powerful pedaling output, making it well suited to professional track riders.
CNC Precision Machining
High-precision CNC processing ensures accurate tooth shape, smooth chain engagement, and stable riding performance.
Anodized Surface Finish
The anodized black coating helps prevent oxidation, corrosion, and wear while giving the chainring a premium appearance.
Chamfered Tooth Design
The outer tooth edge features a chamfered design that reduces chain noise and improves chain contact.
Improved Flatness Accuracy
Factory flatness tolerance is controlled within 0.3mm, helping reduce wobble and improve drivetrain smoothness.
Fatigue Tested
Designed with structural optimization and tested according to GB/T 3565.8-2022, passing fatigue testing at 1800N for 100,000 cycles.
Compatibility Notice
- Designed for BCD144 5-arm cranksets.
- Suitable for fixed gear bikes and track bikes.
- Only compatible with single speed chains.
- Required chain size: 1/2″ x 1/8″.
- Not compatible with multi-speed chains.
- Large tooth sizes may not fit all bike frames. Please check frame clearance before purchase.
Package Includes
- 1 × STONE BCD144 Chainring
- 5 × steel bolts
