The STONE 82BCD Round Narrow Wide Chainring is designed for FSA Gamma Pro and FSA Alpha Drive 1x cranksets, and is also suitable for Marlin 7 MTB bikes equipped with compatible cranksets.
Made from high-strength 7075-T651 aluminum alloy, this chainring features precision CNC machining and a black anodized finish for excellent stiffness, durability, and lightweight performance.
It is available in 30T to 42T options and 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
Fits:
- For FSA Gamma Pro 1x crankset
- For FSA Alpha Drive 1x crankset
- For Marlin 7 MTB with compatible crankset
Chain Compatibility
- MTB chains: 9 / 10 / 11 / 12 speed
- Road chains: 9 / 10 / 11 speed
Default version is not compatible with SRAM AXS 12-speed chains.
If you need compatibility with SRAM AXS 12-speed, 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
- 30T – Max Diameter: 130 mm – Weight: 50 g
- 32T – Max Diameter: 138 mm – Weight: 56 g
- 34T – Max Diameter: 146 mm – Weight: 59 g
- 36T – Max Diameter: 154 mm – Weight: 61 g
- 38T – Max Diameter: 162 mm – Weight: 68 g
- 40T – Max Diameter: 170 mm – Weight: 74 g
- 42T – Max Diameter: 178 mm – Weight: 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 precise fit
Package Includes
- 1 x Chainring
- 4 x Bolts
