STONE Narrow-Wide Direct Mount Chainring for Easton EC90 SL CINCH (3.5mm Offset, 9–12 Speed)
Overview
This direct mount chainring is built for gravel and road bikes and designed specifically for the Easton EC90 SL CINCH crank interface. It uses STONE’s newly designed narrow-wide tooth profile, which improves chain retention, delivers smoother riding, enhances mud clearance, and reduces noise.
Machined from high-strength 7075-T651 aluminum alloy, the chainring combines excellent stiffness, long-lasting durability, and a lightweight construction.
Specifications
| Item | Details |
|---|---|
| Brand | STONE |
| Color | Black, anodized |
| Material | Aluminum 7075-T651 |
| Speed Compatibility | 9 / 10 / 11 / 12-speed standard chains (default version does not support AXS Flattop chain) |
| Crank Interface | Easton EC90 SL CINCH system interface |
| Chainline | 46mm |
| Offset | Inner 3.5mm |
| Thickness | 8mm |
| Hardness | HB150 |
| CNC Accuracy | 0.03mm |
| Recommended Use | Gravel bike / Road bike |
| Not Recommended For | MTB, due to different chainline requirements |
Compatibility Notice
Please check your crank interface carefully before purchasing.
This chainring fits:
- Easton EC90 SL CINCH crank interface
- Cranks with the same interface as Easton EC90 SL
- Spiders with the same interface
- Power meters with the same interface
If your crank, spider, or power meter interface matches the Easton EC90 SL CINCH system, this chainring can be installed.
Please also check your chain type before ordering:
- If your chain is a standard 9–12 speed chain, choose the Standard Version.
- If your chain is a SRAM AXS Flattop chain, choose the AXS Version.
Shimano 12-Speed Road Chain Notice
If you are using a Shimano 12-speed road bike chain, replace the original Shimano 12-speed quick link with a compatible alternative, such as KMC or YBN. The original Shimano 12-speed quick link is too narrow and may not work properly with this chainring.
Weight
| Model | Approx. Weight |
|---|---|
| Hollow Model | 80–170g |
| Aero Model | 100–200g |
Actual weight may vary depending on chainring size and model.
Features
- STONE new narrow-wide tooth design
- Better chain retention with reduced chain drop risk
- Improved self-cleaning performance in mud and dirt
- Lower riding noise
- High stiffness and strong durability
- Lightweight CNC-machined construction
- Suitable for gravel and road riding
Package Includes
- 1 × Bike Chainring
