STONE 104BCD Oval Narrow-Wide Chainring 32-50T for Shimano M430 M780 M610 M670 M980 Cranks, 1x Setup

STONE 104BCD Oval Narrow-Wide Chainring 32-50T for Shimano M430 M780 M610 M670 M980 Cranks, 1x Setup

Stone Oval Narrow-Wide Chainring 104BCD for Shimano / for SRAM Cranks

Technical Specifications

Compatible with Shimano M430 M590 M610 M615 M670 M675 M770 M780 M785 M970 M980 M820

Available Sizes: 34T / 36T / 38T / 40T / 42T / 44T / 46T / 48T / 50T

Product Description:

This Stone oval Narrow-Wide chainring is designed for 1x drivetrain systems, offering excellent chain retention, smooth pedaling performance, and reliable durability. Made from high-strength 7075-T651 aluminum alloy and precisely CNC-machined, it is a great upgrade for MTB, gravel, and compatible road bike setups.

The oval chainring design helps improve pedaling efficiency by reducing the dead spot during each pedal stroke, making climbing and acceleration smoother and more efficient.

Specifications:

Brand: Stone

Material: High-strength Aluminum 7075-T651

Hardness: HB150

BCD: 104BCD

Thickness: 4mm

Surface Treatment: Anodized finish

Color: Black

Manufacturing Process: High-speed CNC machining

CNC Precision: 0.03mm

Chainring Type: Oval Narrow-Wide chainring

Drivetrain Compatibility: 1x only

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 for SRAM 104BCD cranksets, including X0 / X5 / X7 / X9 / XF series

Chain Compatibility:

MTB Chains:

Compatible with 9 / 10 / 11 / 12-speed MTB chains

for SRAM Road Chains:

Compatible with 9 / 10 / 11-speed for SRAM road chains

for Shimano Road Chains:

Compatible with 9 / 10 / 11 / 12-speed for Shimano road chains

Important Note:

This chainring is not compatible with SRAM AXS Flattop 12/13-speed chains.

If you need a tooth profile compatible with SRAM AXS Flattop 12/13-speed chains, please contact us for customization. Extra customization fees may apply.

for Shimano 12-Speed Road Chain Notice:

When using a for Shimano 12-speed road bike chain, please replace the original for Shimano quick link with another brand 12-speed quick link, such as KMC, YBN, SUMC, or other compatible brands. The original for Shimano 12-speed road quick link is too narrow and may not fit properly.

Size / Diameter / Weight:

34T - Max Diameter: 154mm - Weight: approx. 50g

36T - Max Diameter: 162mm - Weight: approx. 62g

38T - Max Diameter: 170mm - Weight: approx. 69g

40T - Max Diameter: 178mm - Weight: approx. 72g

42T - Max Diameter: 186mm - Weight: approx. 78g

44T - Max Diameter: 194mm - Weight: approx. 86g

46T - Max Diameter: 202mm - Weight: approx. 98g

48T - Max Diameter: 210mm - Weight: approx. 109g

50T - Max Diameter: 218mm - Weight: approx. 118g

Package Includes:

1 x Chainring

4 x Chainring Bolts

Features:

• High-Strength 7075-T651 Aluminum

Made from premium 7075-T651 aluminum alloy, offering excellent stiffness, strength, and long-lasting durability.

• Precision CNC Machining

Manufactured with high-precision CNC technology, with machining accuracy up to 0.03mm for reliable performance and accurate fitment.

• Narrow-Wide Tooth Design

The Narrow-Wide tooth profile improves chain retention and helps prevent chain drops during riding.

• Oval Chainring Design

The oval shape helps optimize power transfer, improve pedaling efficiency, and reduce pedaling dead spots.

• Lightweight and Durable

A great balance of low weight, strength, and performance for MTB, gravel, and compatible road bike use.

Important Notes

This chainring is designed for 1x drivetrain systems only.

It cannot be used for 2x or 3x drivetrains.

It does not support front derailleur shifting.

Please make sure your crankset is 104BCD before purchasing.

Production Time:

Most Stone chainrings are made to order. Please allow 3–5 days for production and preparation before shipping. Thank you for your understanding.

Available Options

Each row below is one available option combination. Choose the complete combination that matches your setup.