Quick Summary
The SHIMANO Deore FC-M5100 crankset is a black crankset with 175 mm arms and a 30T chainring. It is presented as a two-piece design, and the stated fit details include compatibility with 1×11 and 1×10 setups, plus 12 x 142 mm and 12 x 148 mm rear spacing.
For buyers comparing cranksets, the main checks here are crank arm length, chainring size, drivetrain compatibility, rear spacing and the bolt pattern. Those are the details that determine whether the crankset matches the rest of the build.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Brand | SHIMANO. Brand identification helps match the crankset to the correct component family. |
| Model | Deore FC-M5100. Model-specific fit matters when matching drivetrain parts. |
| Product type | Crankset. This is the drivetrain part that supports the chainring and pedal interface. |
| Color | Black. Useful for matching a build’s appearance. |
| Crank arm length | 175 mm. Check this against the rider’s preferred crank length. |
| Chainring size | 30T. Compare this with the gearing you want on the bike. |
| Drivetrain compatibility | 1×11 and 1×10. This is a key check before choosing the crankset. |
| Rear spacing | 12 x 142 mm and 12 x 148 mm. Confirm the rear spacing on the bike before buying. |
| Bolt circle diameter | 96 mm Shimano asymmetric. This matters when matching chainring and crank interface details. |
| Bolts | 4 bolts. Check the matching setup if that affects the build. |
| Construction | Two-piece construction. This is part of the crankset’s stated design. |
What to Compare Before Buying
- Crank arm length: This model uses 175 mm arms. Compare that with the length you want for your bike fit and riding position.
- Chainring size: The 30T chainring affects gearing. Make sure it matches the range you want.
- Drivetrain setup: This crankset is stated for 1×11 and 1×10 use. Match it to your drivetrain configuration.
- Rear spacing: Check whether your bike uses 12 x 142 mm or 12 x 148 mm rear spacing.
- Bolt pattern: The 96 mm Shimano asymmetric bolt circle diameter and 4-bolt setup should line up with the rest of the parts you plan to use.
Before You Decide
Confirm the 175 mm arm length, 30T chainring size and 1×11 or 1×10 compatibility before choosing this crankset. Also check the rear spacing and bolt pattern against your bike’s setup so the part matches the build you are planning.
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