STONE 104BCD Chainring Spider for SRAM 8-Bolt MTB Cranks
This STONE chainring spider adapts SRAM 8-bolt mountain bike cranksets to a standard 104BCD chainring mounting interface, giving you access to a wide range of conventional 104BCD MTB chainrings.
Designed specifically for the SRAM 8-bolt crank interface, it converts the direct-mount system into a 104BCD spider, so you can fit standard 104BCD MTB chainrings instead of direct-mount rings.
The spider supports single chainring (1x) installation only, with the option to mount the chainring on either the inner or outer position. This flexibility lets you fine-tune the chainline to suit different frames and chainring sizes.
Compatibility
| Item | Details |
|---|---|
| Crank interface | SRAM MTB 8-bolt cranksets |
| Compatible cranksets | SRAM XX SL / X0 / GX Eagle |
| Chainring fitment | 104BCD MTB chainrings |
| Drivetrain type | 1x chainring only |
| Not supported | Double chainring (2x) setups |
Installation & Offset
- Inner side mounting: 3mm inner offset, 55mm chainline
- Outer side mounting: 63mm chainline
- Outer mounting helps larger chainrings avoid frame contact
- Built-in female bolts for straightforward installation
Frame Support
Suitable for the following rear hub standards:
- 135mm frames
- 142mm frames
- 148mm Boost frames
Material & Construction
- Material: high-strength 7075-T651 aluminum
- High-precision CNC machining
- Working accuracy: 0.03mm
- Surface treatment: anodized finish
Specifications
| Item | Detail |
|---|---|
| BCD | 104BCD |
| Thickness | 8mm |
| Weight | 51g |
| Color | Black, silver |
Package Contents
- 1 × adapter
