STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner
STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner

STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner

For SI SL SISL SISL2 , for F-S-A COMET afterburner

3mm offset

9-12s support

Buy Now

The STONE Direct Mount Chainring is designed for SI, SL, SISL, SISL2 cranksets and compatible F-S-A Comet / Afterburner crank interfaces.

 

Made from high-stiffness 7075-T651 aerospace-grade aluminum, it offers excellent strength, precise fitment, and reliable chain retention for road, gravel, and MTB-style drivetrain setups using standard 9–12 speed chains.

 

Available in Hollow and Aero styles, with tooth options from 30T to 40T.

 

 

Specifications

 

ItemDetails
BrandSTONE
MaterialAerospace-grade Aluminum 7075-T651
Mount TypeDirect Mount
Offset3mm inner offset
Color OptionsBlack / Silver
Chainring StyleHollow / Aero
Chain CompatibilityStandard 9 / 10 / 11 / 12-speed chains
Not Compatible WithNot for SRAM AXS Flattop T-Type 12S chain
Crank CompatibilitySI / SL / SISL / SISL2, F-S-A Comet / Afterburner
Thickness6.7mm
HardnessHB150
Machining Precision0.03mm
Tooth Options30T / 32T / 34T / 36T / 38T / 40T

 

 

Compatibility

This chainring is designed to fit the following cranksets and interfaces:

 

  • For SI
  • For SL
  • For SISL
  • For SISL2
  • For F-S-A Comet
  • For F-S-A Afterburner

 

It works with standard 9-speed, 10-speed, 11-speed, and 12-speed chains.

 

Important Notice:

This chainring does not support SRAM AXS Flattop T-Type 12-speed chains.
Please confirm your crank model and chain type before placing an order.

 

 

Weight Reference

 

Weights may vary slightly depending on production tolerance and tooth size.

TeethAero Style WeightHollow Style Weight
30T60g56g
36T85g72g
40T100g85g

 

 

Product Advantages

 

1. High-Strength 7075-T651 Aluminum

 

Made from 7075-T651 aerospace-grade aluminum, this chainring provides:

 

  • High stiffness
  • Excellent durability
  • Strong impact resistance
  • Low weight
  • Reliable long-term performance

 

2. Precision CNC Machining

 

Each chainring is manufactured with CNC machining accuracy of 0.03mm, ensuring:

 

  • Accurate crank fitment
  • Smooth chain engagement
  • Stable drivetrain operation
  • Consistent riding performance

 

3. Narrow-Wide Tooth Design

 

The narrow-wide tooth profile helps improve chain retention and reduce the risk of chain drop during riding.

 

It also helps clear mud and dirt more effectively, supporting smoother and more reliable drivetrain performance.

 

 

Package Includes

 

  • 1 × STONE Direct Mount Chainring

 

 

STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner

STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner STONE bike chainring direct mount for Can for F-S-A 3mm inner offset 30 32 34 36 38 40T aero hollow SI SL SISL SISL2 COMET afterburner

  • Stone 144BCD Fixie Chainring 70T Introduced2022-3-18

    Stone 144BCD fixie chainring is famous on the market. We used to produce max 60T, but lots of clients ask for 61-70T products. We finally introduced it. You can buy here  

  • Areo Chainring for Shimano 110BCD 105 R7000 R8000 R9100 Released2022-3-18

    Stone 110BCD road bike chainring for Shimano 110BCD 105 R7000 R8000 R9100 is quite popular on market. Loved by lots of professional riders. Now new released cool looking aero style. You can order here round oval

  • New CNC Center Installed2022-3-18

    Due to the booming business in international market in 2020-2021, our mill running in full capacity but still can not meet the clients demand. in Januaray of 2022, 3 sets new CNC center installed in Stone’s new premise. Let the produc […]

  • Sram AXS Flattop Chainring Customize Manufacturer2022-3-18

    Stone design workshop can make axs flattop 12s chainring for all kind of chainrings,  any BCD and any direct mount chainring. With real 7075 T651 Aluminum materials. Lifespan 10000-15000km for professinal riders. MOQ 1 unit. You can buy her […]

  • Keep Warm for CNC Center in Winter2022-3-18

    Stone CNC center located in northern of China, winter as cold as -15 celsius degree.  Low temperature thermal expansion and contraction will make the machine loose precision. So what we did is open air heater 24 hours to keep the machine on […]

  • Stone Chainring Catalogue Brochures2025-2-24

    Update time: 2026-Feb-6th   Most chainrings can make areo style. All 1by speed bike chainrings can customize to AXS flattop road bike 12s 13s tooth. T-type 12s 13s tooth. Ekar 13s tooth. All hollow chainrings can make black, silver col […]

Related Products