Quick Summary
The Shimano Altus M315 is a black double chainset with a 36/22T tooth arrangement, 170 mm crank length and Boost fitment. It is described as an FC-M315 chainset for 7/8-speed use and is supplied without a chainguard.
This is the main product to compare if you need the correct chainset format, tooth combination and crank length for a compatible build.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | Shimano, which identifies the product family. |
| Model | Altus M315 / FC-M315, useful for matching the correct chainset variant. |
| Product type | Double chainset, so the setup uses two chainrings. |
| Tooth combination | 36/22T, which is the chainring size to compare against your gearing needs. |
| Crank length | 170 mm, a key size check before choosing a set. |
| Speed | 7/8-speed, so compatibility should be checked against the rest of the drivetrain. |
| Fitment | Boost, which is an important fit check for the intended bike setup. |
| Colour | Black. |
| Included guard | Without chainguard. |
What to Compare Before Buying
- Drivetrain speed: This chainset is listed for 7/8-speed use, so compare it with the rest of your drivetrain.
- Chainring sizes: The 36/22T combination sets the gearing feel, so check it matches the riding setup you want.
- Crank length: The stated 170 mm length should be checked against the size you need.
- Boost fitment: Confirm the Boost specification matches the bike and frame arrangement.
- Chainguard: This model is supplied without a chainguard, so check whether you need one separately.
Before You Decide
Confirm the FC-M315 model, 36/22T chainring combination and 170 mm crank length before choosing an offer. Also check that Boost fitment and 7/8-speed compatibility match your bike, and note that the chainset is supplied without a chainguard.
