SHIMANO SLX SM-CRM75 1x Chainring for M7100 and M7130 Cranks
- 32 tooth chainring
- Direct mount style
- For M7100 and M7130 1x cranks
- Dynamic Chain Engagement+ tooth profile
- Aluminum, black
- 3.2 ounces item weight
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A single ring direct mount chainring for the matching SLX cranks, with a tooth shape meant to hold the chain. It only fits the cranks named, so check your crank model first.
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ASIN: B07V6PRML1Model: ISMCRM75A2Category: Chainrings
Sizes Available
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Overview
Shimano makes this SLX chainring for its matching one by crank sets, with a direct mount fitting and a special mountain bike tooth profile. Dynamic Chain Engagement plus shaping is designed to improve chain engagement and retention.
A one by drivetrain loses front shifting, so chain retention matters, and this ring is shaped for exactly that. Aluminum holds weight down. The limitation is the narrow fit, since it suits only the cranks named, and no care or wear guidance is provided.
Who it's for
Riders running a one by setup on the named SLX cranks who want a direct mount replacement. Owners of other cranks, or those who need a different tooth count, should look elsewhere.
Pros and cons
- Tooth shape aids chain retention
- Direct mount fitting
- Aluminum for low weight
- Fits only named SLX cranks
- Single tooth count in this listing
- No wear guidance
Performance notes
With a single ring, the tooth profile does the work of holding the chain on rough ground. Narrow and wide shaped teeth engage the chain links more securely than uniform teeth. Direct mount attaches to the crank without a spider, so the crank must be built for that fitting.
Where it stands among chainrings
- #1 most-searched brand and model of the 9 chainrings lines we track (by search demand, not sales).
From the specs of the 15 chainrings we list; not a test result.
Specifications
| Model | ISMCRM75A2 |
|---|---|
| Dimensions & fit | |
| Size | 32T |
| Item weight | 3.2 ounces |
| Construction & materials | |
| Material | Aluminum |
| Color | Black |
| Warranty & support | |
| Warranty Description | Limited warranty |
| Other details | |
| Style | Direct mount |
| Suggested Users | Unisex adult |
Frequently asked questions
How do I look after the Shimano SLX SM-CRM75 chainring?
The listing gives no care guidance. It describes an aluminum chainring with a Dynamic Chain Engagement+ tooth profile.
Which cranks does the Shimano SLX SM-CRM75 fit?
Shimano's M7100 and M7130 1x cranksets, according to the description.
Is the Shimano SLX SM-CRM75 for a double crankset?
No. It is a 1x chainring.