Stone 104BCD Round Narrow Wide Chainring for SRAM AXS Flattop / T-Type 12-Speed Chains (32T–50T, Shimano & SRAM 104BCD Cranks)
Overview
A precision round narrow wide chainring engineered for SRAM AXS Flattop / T-Type 12-speed chains on 1x drivetrains, mounted on a standard 104BCD bolt pattern.
- Fits Shimano M590, M610, M670, M780, M980 and SRAM X0, X5, X7, X9 cranksets
- Available sizes: 32T / 34T / 36T / 38T / 40T / 42T / 44T / 46T / 48T / 50T
Product Description
This Stone round T-Type narrow wide chainring is purpose-built for SRAM AXS Flattop / T-Type 12-speed chains and 1x drivetrain systems. It is CNC-machined from high-strength 7075-T651 aluminum alloy for excellent stiffness, durability, and smooth riding performance.
The narrow wide tooth profile is optimized for SRAM AXS Flattop / T-Type chains, delivering reliable chain retention and stable power transfer for MTB riding.
Specifications
| Brand | Stone |
|---|---|
| Material | High-strength aluminum 7075-T651 |
| Material supplier | Aleris, USA |
| Hardness | HB150 |
| BCD | 104BCD |
| Chainring shape | Round |
| Model options | 104BCD Hollow model / 104BCD Aero model |
| Thickness | 4 mm |
| Color | Black / Red anodized |
| Surface treatment | Anodized finish |
| Manufacturing process | High-speed CNC machining |
| CNC precision | 0.03 mm |
| Drivetrain compatibility | 1x only |
| Chain compatibility | SRAM AXS Flattop / T-Type 12-speed chain |
Compatible Cranksets
For Shimano
M430 / M590 / M610 / M615 / M670 / M675 / M770 / M780 / M785 / M970 / M980 / M820 and other compatible 104BCD cranksets.
For SRAM
Compatible with most SRAM 104BCD cranksets, including X0 / X5 / X7 / X9 / IXF series.
Important Compatibility Notes
- Designed for SRAM AXS Flattop / T-Type 12-speed chains only.
- Suitable for 1x drivetrain systems only.
- Does not support 2x or 3x drivetrains.
- Does not support front derailleur shifting.
Please confirm your crankset is 104BCD before purchasing.
Size, Diameter, and Weight
| Size | Max Diameter | Weight (approx.) |
|---|---|---|
| 32T | 138 mm | 39 g |
| 34T | 146 mm | 51 g |
| 36T | 154 mm | 57 g |
| 38T | 162 mm | 61 g |
| 40T | 170 mm | 71 g |
| 42T | 178 mm | 77 g |
| 44T | 186 mm | 86 g |
| 46T | 194 mm | 102 g |
| 48T | 202 mm | 108 g |
| 50T | 210 mm | 119 g |
Package Includes
- 1 x Bike chainring
- 4 x Chainring bolts
Features
Premium 7075-T651 Aluminum Alloy
Made from high-strength 7075-T651 aluminum alloy supplied by Aleris USA, a trusted supplier for major aircraft manufacturers such as Airbus, Boeing, and Bombardier. The material offers excellent stiffness, strength, and durability.
Designed for SRAM AXS Flattop / T-Type Chains
The tooth profile is specially designed for SRAM AXS Flattop / T-Type 12-speed chains, ensuring smooth engagement and reliable chain retention.
Precision CNC Machining
Manufactured with high-precision CNC technology, with machining accuracy up to 0.03 mm for accurate fitment and consistent performance.
Narrow Wide Tooth Design
The narrow wide tooth profile helps prevent chain drops and improves riding stability on rough terrain.
Lightweight and Durable
A great balance of low weight, high strength, and long-lasting performance for MTB and 1x drivetrain setups.
Multiple Size Options
Available from 32T to 50T to meet different riding needs, including climbing, trail riding, and high-speed riding.
