Product Description
M21 rear derailleurs are designed to work with 6- and 7-speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs.
- Model No.: RD-M21L
- Cassette Compatibility: 6 / 7 Speed
- Cage Type: Long Cage
- Front Chainring: Double / Triple
- Max. Sprocket: 32T
- Min. Sprocket: 11T
- Total Capacity: 43T
- Guide Pulley: Engineering Composite with Steel Bushing
- Tension Pulley: Engineering Composite with Steel Bushing
- Bracket Body: Resin / Black
- Mount Type: Direct Attachment
- Plate Body: Resin / Black
- Outer Link: Resin Steel
- Inner Link: Black Steel
- Outer Plate: Black Painted Steel
- Inner Plate: Black Painted Steel
- Weight: 279g
- Compatibility: Shimano 6 / 7 Speed MTB Rear Derailleur Compatible
Availability & Sizing
Product Details
Price History
Historical Data
Last 1 days of price history
| Date | Low Price | High Price | Average Price | Vendors |
|---|---|---|---|---|
| May 8, 2026 | $11.99 | $11.99 | $11.99 | 1 |
Price Statistics
Description
M21 rear derailleurs are designed to work with 6- and 7-speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs. Model No.: RD-M21L Cassette Compatibility: 6 / 7 Speed Cage Type: Long Cage Front Chainring: Double / Triple Max. Sprocket: 32T Min. Sprocket: 11T Total Capacity: 43T Guide Pulley: Engineering Composite with Steel Bushing Tension Pulley: Engineering Composite with Steel Bushing Bracket Body: Resin / Black Mount Type: Direct Attachment Plate Body: Resin / Black Outer Link: Resin Steel Inner Link: Black Steel Outer Plate: Black Painted Steel Inner Plate: Black Painted Steel Weight: 279g Compatibility: Shimano 6 / 7 Speed MTB Rear Derailleur Compatible
Additional Info
Vendor Comparison (1 stores)
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| Vendor | Price | Stock | Last Updated | Action |
|---|---|---|---|---|
Sports Basement Best Price | $11.99 | Out of Stock | 5/8/2026 | View Product → |
Available Sizes & Variants (1)
| Variant | Size | Color | Price | Status | Stores | Buy |
|---|---|---|---|---|---|---|
Black / One Size | One Size | Black | $11.99 $12.99 | In Stock | 1 store | Buy |
