Race Face Narrow Wide Single Chainring
- 104 x 38T single ring size
- Narrow wide tooth profile, chain retention
- Machined 7075 aluminum, per the description
- 2.88 ounces listed weight
- Black finish, model year 2018
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A narrow-wide single ring for riders from downhill to cross-country. The specs table says plastic while the description says machined aluminum.
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ASIN: B077Y3GCS7Model: RNW104X38BLK_NoirCategory: Chainrings
Colors Available
Sizes Available
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Overview
A downhill racer, dirt jumper or cross-country rider on a single-ring drivetrain can fit this Race Face narrow wide chainring. Its tooth shape is meant to hold the chain, and it is finished in black.
Chain retention is the reason to buy for rough terrain, and the description calls the ring light enough for cross-country and singlespeed use. Material information is contradictory, and no bolt-pattern guidance is given beyond the size.
Who it's for
Single-chainring mountain bikes on rough or fast terrain are the use here. Riders who cannot confirm their crank pattern against the listed size should check first.
Pros and cons
- Narrow wide chain retention
- Light enough for cross-country
- Single ring suits simple drivetrains
- Material shown two ways
- Item dimensions listed as zero
- Install steps not given
Performance notes
Alternating narrow and wide teeth match the inner and outer links of the chain, which is how the ring holds the chain on bumps. A single ring removes the front shifting and relies on the rear gears for range.
Specifications
| Model | RNW104X38BLK_Noir |
|---|---|
| Dimensions & fit | |
| Size | 104 x 38T |
| Item weight | 2.88 ounces |
| Construction & materials | |
| Material | Plastic per specs table, 7075 aluminum per description |
| Color | Black |
| Warranty & support | |
| Warranty Description | Limited Warranty |
| Other details | |
| Sport Type | Cycling |
| Teeth | 38 teeth |
| Suggested Users | Unisex |
| Model Year | 2018 |
| Tooth profile | Narrow wide |
Closest rivals on specs
SHIMANO SLX SM-CRM75 1x Chainring for M7100 and M7130 Cranks- Item Weight 0.18 vs 0.2 pounds (-10%)
SHIMANO XT SM-CRM85 1x Chainring for M8100 and M8130 Cranks- Item Weight 0.18 vs 0.2 pounds (-10%)
SRAM Chainring Road, 34t 5 Bolt 110 mm BCD Alum (50-34) - Black, 3 mm- Item Weight 0.18 vs 0.15 pounds (+20%)
Frequently asked questions
How do I install the Race Face Narrow Wide chainring?
The listing gives no install steps. Check your crank's chainring bolt pattern against the size in the specs.
What is the Race Face Narrow Wide chainring made of?
The description says machined aluminum, while the specs table says plastic. The description is more specific, but confirm with the seller.
Does the Race Face Narrow Wide ring suit a double crankset?
No. It is a single chainring for one-by drivetrains.
Is the Race Face ring only for downhill?
No. The description says it is burly enough for downhill and dirt jumping and light enough for cross-country and singlespeed.