Name: STONE 120BCD Narrow-Wide Chainring 36T-50T for SRAM X9, 9-12 Speed 1x
Brand: STONE

STONE 120BCD Round Narrow-Wide Chainring for SRAM X9 / XX (36T–50T, 9–12 Speed 1x)

This chainring is designed for 1x drivetrain setups only. It is not compatible with 2x drivetrains, front derailleurs, or front shifting.

It features STONE’s narrow-wide tooth profile, engineered to improve chain retention, reduce chain drop, enhance self-cleaning performance in muddy conditions, and lower drivetrain noise. CNC-machined from high-strength 7075-T651 aluminum alloy sourced from Aleris USA, it offers excellent stiffness, long-lasting durability, and dependable riding performance.

Specifications

Item	Specification
Brand	STONE
Product Type	Round Narrow-Wide Chainring
BCD	120BCD
Material	7075-T651 aluminum alloy from Aleris USA
Hardness	150HB
Thickness	4mm
CNC Precision	0.03mm
Color	Black
Surface Treatment	Anodized
Compatible Crankset	SRAM X9 / XX (1x setups only)
Chain Speed	9 / 10 / 11 / 12-speed (not for Flattop / T-type chain)
Bolts Included	Yes, 4 aluminum bolts

Key Features

Round design for 120BCD cranksets
Compatible with SRAM X9 / XX
STONE narrow-wide tooth profile for improved chain retention
Enhanced anti-chain-drop performance
Better self-cleaning from mud and dirt
Reduced drivetrain noise
Made from 7075-T651 aluminum alloy
CNC-machined with 0.03mm precision
Black anodized finish
Includes 4 aluminum bolts

Important Notice for 36T

The 36T chainring comes with washers. When installing the 36T chainring, please use the washers together with the chainring bolts.

Compatibility

This chainring fits the following 120BCD cranksets:

SRAM X9 cranksets
SRAM XX cranksets

It is not compatible with 2x drivetrains, front derailleurs, or front shifting. Please check your crankset BCD and bolt pattern carefully before ordering.

Chain Compatibility

Compatible with:

MTB chains: 9 / 10 / 11 / 12-speed
SRAM road chains: 9 / 10 / 11-speed
Shimano road chains: 9 / 10 / 11 / 12-speed

It is not compatible with the SRAM AXS 12-speed Flattop chain by default. If you need a tooth profile for the SRAM AXS Flattop chain, please send us a message before ordering — customization is available with an extra surcharge.