Stone Round Bike Chainring for White Industries industry R30 M30 Crank 40T To 56T Cycling Bike Chainwheel for Road Bike for Brompton Folding Bike

Stone Round Bike Chainring for White Industries industry R30 M30 Crank 40T To 56T Cycling Bike Chainwheel for Road Bike for Brompton Folding Bike

Upgrade your drivetrain with the Stone Round Narrow-Wide Chainring, designed specifically for White Industries R30 and M30 cranksets. Made from high-strength 7075-T651 aerospace-grade aluminum alloy, this chainring offers excellent stiffness, durability, and reliable performance for road, gravel, and folding bike setups.

Product Specifications

Brand: Stone

Material: Aerospace-grade high-stiffness 7075-T651 aluminum alloy

Color Options: Black / Silver

Tooth Profile: Narrow-wide tooth design

Chainring Type: 1x single chainring only

Speed Compatibility: 9 / 10 / 11 / 12-speed

Crank Compatibility: White Industries R30 / M30 cranksets only

Not Compatible With: Other crank models or White Industries square taper cranks

Thickness: 4 mm

Hardness: HB150

Processing Precision: 0.03 mm

Tooth Options: 40T / 42T / 44T / 46T / 48T / 50T / 52T / 54T / 56T

Application: Road bike / Gravel bike / Brompton folding bike

Package Includes: 1 x Bike Chainring

Important Compatibility Notes

This chainring is designed only for White Industries R30 and M30 cranksets.

It is not compatible with other crank models. It also cannot be installed on White Industries square taper cranks, because the mounting interface shape is different.

This product is suitable for road bikes and gravel bikes. The chainline is not recommended for MTB use.

Chain Compatibility Notice

This chainring is compatible with standard 9 / 10 / 11 / 12-speed chains.

By default, it does not support SRAM AXS Flattop or SRAM T-Type 12-speed chains.
If you need a customized tooth profile for AXS or T-Type chains, please contact us before placing your order.

If you are using a Shimano 12-speed chain,
please replace the original quick link with a KMC, YBN, or SUMC 12-speed quick link, as the original Shimano 12-speed quick link is too narrow.

Tooth Size & Maximum Diameter

Features

• New Stone workshop narrow-wide tooth design
• Improved chain retention for better anti-drop performance
• Enhanced self-cleaning ability in muddy or dirty conditions
• Reduced drivetrain noise
• CNC machined for precise fitment and smooth operation

Advantages

1. Premium Material

Made from high-strength 7075-T651 aluminum alloy, this chainring provides excellent stiffness, durability, and long service life.

2. High-Precision CNC Machining

Manufactured with 0.03 mm processing accuracy, ensuring reliable fitment, stable performance, and a smooth riding experience.