STONE 130BCD Round Chainring 38-70T for Brompton 3sixty and for Shimano 5700 6700 Cranks, Narrow-Wide 1x Setup

STONE 130BCD Round Chainring 38-70T for Brompton 3sixty and for Shimano 5700 6700 Cranks, Narrow-Wide 1x Setup

Upgrade your drivetrain with this high-precision Stone 130BCD Narrow-Wide chainring, designed for 1x drivetrain setups only. Made from high-strength 7075-T651 aluminum alloy, it offers excellent stiffness, durability, and chain retention for road, folding, and modified bike builds.

Technical Specifications

Key Features

• Brand: Stone
• BCD: 130BCD
• Tooth Options: 38T–70T
• Design: Narrow-Wide tooth profile
• Drivetrain Compatibility: 1x setup only
• Material: High-strength Aluminum 7075-T651
• Hardness: HB150
• Thickness: 4mm
• CNC Precision: 0.03mm
• Surface Treatment: High-speed CNC machining + anodized finish
• Colors: Black / Silver
• Style Options:
  • Hollow Style: 38T–70T
  • Aero Style: 42T–70T

Important Notice

This chainring is designed for 1x drivetrain systems only.

It cannot be used for 2x setups and does not support front derailleur shifting.

Please make sure your bike uses a compatible 130BCD crankset before ordering.

Compatibility

Fits 130BCD Cranksets, including:

• For Shimano 5700
• For Shimano 6700
• For SRAM Red
• For Rotor 130BCD crank
• For Brompton / 3Sixty modified crank setups with 130BCD
• For Other compatible 130BCD road or folding bike cranksets

Chain Compatibility

This chainring supports most common 9/10/11/12-speed chains.

Important for Shimano 12-Speed Road Chains

If you use a for Shimano 12-speed road chain, please replace the original for Shimano quick link with another brand of 12-speed quick link, such as:

• KMC
• YBN
• SUMC
• Other compatible 12-speed quick links

The original for Shimano 12-speed road quick link is too narrow and may not fit properly.

For SRAM AXS Flattop 12/13-speed Chain

This standard version does not support for SRAM AXS Flattop 12/13-speed chains.

If you need a tooth profile compatible with SRAM AXS Flattop 12/13-speed chain, please contact us before ordering. Customization is available with an additional surcharge.

Size, Diameter & Weight Chart — Hollow Style

62T 257mm

64T 265mm

66T 273mm

68T 281mm

70T 289mm

72T 298mm

Note: 38T size includes 5 additional bolt washers.

Package Includes

• 1 × Chainring
• 5 × Chainring bolts
• 5 × Additional bolt washers (for 38T size only)

Advantages

1. Premium 7075-T651 Aluminum

Made from high-strength 7075-T651 aluminum alloy, this chainring provides excellent stiffness, strength, and long-lasting performance.

2. High-Precision CNC Machining

Manufactured with 0.03mm CNC processing accuracy, ensuring precise tooth shape, smooth operation, and reliable chain engagement.

3. Narrow-Wide Tooth Design

The Narrow-Wide tooth profile improves chain retention and helps reduce chain drop, making it ideal for 1x drivetrain setups.

4. Lightweight and Durable

Optimized structure keeps the chainring lightweight while maintaining strong riding performance.

Production Time

Most Stone chainrings are produced after order confirmation.

Production usually takes 3–5 days before shipping. Thank you for your patience and understanding.

Available Options

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