STONE 82BCD Narrow Wide Round Chainring 30T–42T for FSA Alpha Drive & Gamma Pro 1x Cranksets and Marlin 7 MTB
The STONE 82BCD Round Narrow Wide Chainring is designed for FSA Gamma Pro and FSA Alpha Drive 1x cranksets, and also fits Marlin 7 MTB bikes equipped with a compatible crankset.
CNC-machined from high-strength 7075-T651 aluminum alloy with a black anodized finish, it delivers excellent stiffness, durability, and lightweight performance. Available in 30T to 42T options, it is designed for 1x drivetrain systems only.
Features
- 82BCD round chainring
- Designed for FSA Gamma Pro and Alpha Drive 1x cranksets
- Suitable for Marlin 7 MTB
- Narrow-wide tooth profile for improved chain retention
- Made from high-strength 7075-T651 aluminum alloy
- Precision CNC machining
- Black anodized finish
- Designed for 1x drivetrain systems only
Specifications
- Brand: Stone
- Product Type: Round Narrow Wide Chainring
- BCD: 82BCD
- Tooth Options: 30T / 32T / 34T / 36T / 38T / 40T / 42T
- Material: High-strength 7075-T651 aluminum alloy
- Material Hardness: HB150
- Thickness: 4 mm
- Color: Black anodized
- CNC Precision: 0.03 mm
- Surface Treatment: Anodized, high-speed CNC machining
Compatibility
This chainring fits:
- FSA Gamma Pro 1x crankset
- FSA Alpha Drive 1x crankset
- Marlin 7 MTB with compatible crankset
Chain Compatibility
- MTB chains: 9 / 10 / 11 / 12 speed
- Road chains: 9 / 10 / 11 speed
The default version is not compatible with SRAM AXS 12-speed chains. If you need SRAM AXS 12-speed compatibility, customization is available.
Important Notes
- This chainring is designed for 1x drivetrain systems only
- Not compatible with 2x or 3x systems
- Does not support front derailleur shifting
- Please confirm your crankset uses 82BCD before placing an order
Size and Weight
| Tooth Count | Max Diameter | Weight |
|---|---|---|
| 30T | 130 mm | 50 g |
| 32T | 138 mm | 56 g |
| 34T | 146 mm | 59 g |
| 36T | 154 mm | 61 g |
| 38T | 162 mm | 68 g |
| 40T | 170 mm | 74 g |
| 42T | 178 mm | 81 g |
Advantages
- Made from high-strength 7075-T651 aluminum alloy for excellent stiffness and durability
- Manufactured with high-precision CNC machining at 0.03 mm accuracy for reliable performance and a precise fit
Package Includes
- 1 x Chainring
- 4 x Bolts
