Shimano STEPS Chainring - 12spd - 36T - 55mm Chain Line
Not Available
Currently unavailable
Currently out of stock
This product is not available at the moment. Check back later.
Product Information
Full details
This guide is for cyclists using Shimano STEPS electric bike systems who need a durable and reliable 12-speed chainring. The SM-CRE70-12-B offers superior chain retention and reduced noise thanks to its Dynamic Chain Engagement (DCE) technology. A minor caveat is that the fixing lock nut is sold separately, requiring an additional purchase.
All features
| Model Part Number | SMCRE70 |
|---|---|
| Brand | SHIMANO |
Extended Product Information
FAQs
Is the chainring fixing lock nut included?
No, the Shimano STEPS SM-CRE70-12-B chainring fixing lock nut is sold separately and must be purchased in addition to the chainring.
What size chain is compatible with this chainring?
This chainring is specifically designed for 12-speed chains.
What does 'Dynamic Chain Engagement (DCE)' mean?
DCE refers to Shimano's technology that uses a specially designed tooth profile to securely hold the chain on the chainring, preventing drops and reducing noise.
What is the required chain line for this chainring?
The required chain line for the SM-CRE70-12-B is 55 mm.
Can this chainring be used on a non-electric bike?
While mechanically possible, this chainring is optimized for Shimano STEPS e-bike systems, which have specific torque and performance characteristics. It may not provide optimal performance on a standard mechanical bicycle.
How do I check if my bike has a 55mm chain line?
You can measure the distance from the center of the seat tube to the midpoint of the chain. Consult your bicycle manufacturer or a qualified bike mechanic if you are unsure.
What is the material of the teeth?
The teeth are made of steel for enhanced durability and wear resistance.
Troubleshooting
Chain drops frequently
Verify the chainring is correctly installed with the proper alignment for the 55mm chain line. Ensure the 12-speed chain is not worn and the derailleur is properly adjusted. Check that the chainring fixing lock nut is securely tightened.
Excessive drivetrain noise
Confirm that the chainring is clean and free from debris. Ensure the chain is properly lubricated and that the 12-speed chainring is compatible with your specific chain and other drivetrain components. The DCE technology is designed to reduce noise, but extreme noise may indicate other issues.
Chainring doesn't fit crankset
Confirm that the chainring's bolt pattern (B.C.D.) matches your crankset. Ensure you are using the correct chainring for your Shimano STEPS system and frame's chain line requirements (55mm).
Pros and Cons
Pros
- Excellent chain retention prevents chain drops on rough terrain.
- DCE technology significantly reduces drivetrain noise.
- Durable steel construction ensures a long lifespan.
- Optimized for 12-speed systems for smooth shifting.
- Reduces overall drivetrain drag.
Cons
- Chain ring fixing lock nut is not included and must be purchased separately.
- Specific 55 mm chain line may limit compatibility with some frame or crankset combinations.
- Primarily designed for e-bike systems, may not be ideal for standard mechanical setups.
Setup, Compatibility & Care
Setup: The SM-CRE70-12-B chainring requires a compatible Shimano STEPS crankset and a 12-speed chain. Ensure you have the correct chainring fixing lock nut, as it is sold separately. Installation involves mounting the chainring to the crank spider using the appropriate bolts and then securing it with the lock nut.
Compatibility: This chainring is designed for Shimano STEPS e-bike systems and is compatible with 12-speed chains. It requires a 55 mm chain line, which is crucial for proper alignment with the rear cassette and drivetrain. Always verify your frame and existing component compatibility before purchase.
Care: To maintain optimal performance and longevity, regularly clean the chainring with a mild degreaser and water. Inspect the teeth for wear; replace the chainring if teeth become significantly worn or damaged. Ensure the chainring bolts and lock nut remain tight.