STONE Spider Adapter: Convert Pre-2018 ROTOR 30mm Cranks to 104BCD for 1x Chainrings
ROTOR to 104BCD Chainring Spider Adapter
This spider adapter converts compatible ROTOR 30mm spindle cranksets to the standard 104BCD chainring mounting system. Once installed, it opens up a wide selection of narrow-wide single chainrings, making it a practical upgrade path for riders building 1x drivetrains.
Compatibility
- Fits ROTOR 30mm spindle cranksets produced before 2018.
- Accepts 104BCD narrow-wide single chainrings.
- Designed for single speed / 1x drivetrain use.
Important Compatibility Notes
Please verify your crank model and spindle interface carefully before purchase.
- Not compatible with ROTOR 24mm spindle cranksets.
- Not compatible with ROTOR 2018 and newer crank models.
- Not compatible with Shimano direct mount systems.
- Not compatible with SRAM direct mount systems.
Specifications
| Brand | STONE |
|---|---|
| Product Type | Chainring Spider Adapter / Chainring Converter |
| Application | ROTOR to 104BCD single chainring conversion |
| Material | High-strength AL7075-T651 aluminum |
| Material Hardness | HB150 |
| Surface Treatment | Anodized |
| Process | High-speed CNC machining |
| Color | Black |
| BCD | 104BCD |
| Offset | 5mm |
| Thickness | 6mm |
Drivetrain compatibility: single speed / 1x drivetrain.
Product Features
1. ROTOR to 104BCD Conversion
Converts compatible ROTOR 30mm spindle cranksets to the standard 104BCD chainring system, greatly expanding your chainring options.
2. 5mm Offset Design
The 5mm offset helps optimize chainline for single-chainring drivetrain setups.
3. AL7075-T651 Aluminum Construction
Machined from high-strength 7075-T651 aluminum for excellent stiffness, durability, and lightweight performance.
4. CNC-Machined Precision
High-speed CNC machining ensures accurate fitment and stable chainring installation.
5. Anodized Black Finish
Anodized surface treatment improves wear resistance and delivers a clean, durable finish.
Package Includes
- 1 x Chainring Spider Adapter
Chainring and bolts are not included.
