RISK Parts Cassette Spacer Hub Base Shim Mountain/Road Bike Hub Base Fine Adjustment 10S-11S Sprocket Repair RA107
Designed with a slot to match the HG standard bottom bracket, allowing the washer to fit into the bottom bracket groove.
Descriptions
The RISK RA107 Cassette Spacer is designed for bicycle HG freehub bodies and cassette installation adjustment. Made from lightweight AL6061 aluminum alloy, this slotted spacer helps fine-tune cassette positioning, improve fitment, and support different cassette and freehub compatibility setups.
The RA107 uses a slotted design based on HG freehub structure, allowing the spacer to match the grooves of the freehub body for a more stable and accurate fit. Multiple thickness options are available, including 1 mm, 1.5 mm, 2 mm, 1.85 mm, 2.18 mm, and 2.35 mm, suitable for different road bike and mountain bike cassette installation needs.
It can be used for common cassette spacing adjustment, 7/8/9/10-speed cassette setups, installing 8/9/10-speed cassettes on an 11-speed road freehub, or as a cassette carrier spacer repair part depending on the drivetrain configuration.
Note: This product includes cassette spacer only. Freehub body, cassette, hub, and other parts shown in images are for display only and are not included. Compatibility may vary by cassette, hub, and drivetrain brand. Please confirm the required spacer thickness before purchase.
Key Features
- Designed for HG freehub and cassette spacing adjustment
- Made from lightweight AL6061 aluminum alloy
- Slotted design matches HG freehub grooves
- Helps fine-tune cassette position and spacing
- Multiple thickness options for different installation scenarios
- Suitable for road bikes, mountain bikes, and wheelset maintenance
- Useful for cassette conversion, spacing correction, and repair
- Available as single thickness or 3-piece combo pack
Product Specifications
| Item | Details |
|---|---|
| Brand | RISK |
| Model | RA107 |
| Product Name | Slotted Cassette Spacer / Freehub Spacer |
| Material | AL6061 Aluminum Alloy |
| Color | Black |
| Compatibility | HG freehub / cassette |
| Available Thickness | 1 mm, 1.5 mm, 2 mm, 1.85 mm, 2.18 mm, 2.35 mm |
| Package Type | Box / branded package |
| Package Size | Approx. 10 × 8 × 0.1 cm |
Product Options
1. 1 mm + 1.5 mm + 2 mm Combo Pack
Thickness: 1 mm + 1.5 mm + 2 mm
Quantity: 3 pcs / box
Use: General cassette spacing adjustment and multiple setup options.
2. 1 mm Spacer
Thickness: 1 mm
Quantity: 1 pc / box
Use: Common spacing adjustment for cassette installation.
3. 1.5 mm Spacer
Thickness: 1.5 mm
Quantity: 1 pc / box
Use: Fine cassette position adjustment.
4. 2 mm Spacer
Thickness: 2 mm
Quantity: 1 pc / box
Use: Commonly used for spacing correction or cassette conversion setups.
5. 1.85 mm Spacer
Thickness: 1.85 mm
Quantity: 1 pc / box
Recommended Use: For installing 8/9/10-speed cassettes on 11-speed road HG freehub bodies.
6. 2.18 mm Spacer
Thickness: 2.18 mm
Quantity: 1 pc / box
Recommended Use: Cassette carrier spacer repair part for 11-speed cassettes.
7. 2.35 mm Spacer
Thickness: 2.35 mm
Quantity: 1 pc / box
Recommended Use: Cassette carrier spacer repair part for 10-speed cassettes.
Usage Reference
| Use Case | Recommended Spacer |
|---|---|
| Common 8/9-speed freehub with 8/9-speed cassette | Usually no spacer required |
| Common 8/9-speed freehub with 7-speed cassette | 2 × 2 mm spacers |
| Common 8/9-speed freehub with 10-speed cassette | 1 × 1 mm spacer |
| 11-speed road freehub with 8/9/10-speed cassette | 1 × 1.85 mm spacer |
| 11-speed cassette carrier spacer repair | 2.18 mm spacer |
| 10-speed cassette carrier spacer repair | 2.35 mm spacer |
This table is for reference only. Actual requirements may vary depending on hub, cassette, and brand specifications.
Precision Cassette Spacing
Helps adjust cassette position on HG freehub bodies for better installation and drivetrain setup.
Slotted HG Design
The slotted structure is designed to match HG freehub grooves, helping the spacer sit more securely.
AL6061 Aluminum Alloy
Lightweight and durable aluminum alloy construction provides reliable performance with minimal weight.
Multiple Thickness Options
Six thickness options meet different cassette installation, conversion, and repair needs.
For Road & MTB Use
Suitable for road bikes, mountain bikes, wheelset maintenance, and drivetrain tuning.
