KMC, S1, Chain, Speed: 1, 1/8'', Links: 112, Brown, Black, One Size
- Single speed, 1/8 inch chain
- 112 links
- Single strand design
- 12.96 ounces item weight
- Brown and black finish
- 1 year warranty
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A single speed bicycle chain in a brown finish with a stated link count for easy comparison. Several of the technical rows look inconsistent, so measure your drivetrain before ordering.
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ASIN: B07NR6MQTNModel: S1Category: Chains
Overview
A single speed bike owner gets a KMC S1 chain sold at a length of one hundred twelve links and a width of one eighth inch. The listing names a single strand design and a blended material, and the colors are brown and black.
KMC supplies a complete length chain for fixed gear and single speed bikes, so a worn chain can be replaced in one step. The unusual brown color is a visible bonus. The limitation is data quality: the pitch, plate and roller rows look unreliable, and the tensile load figure is a single small number.
Who it's for
Commuter and city bikes with a single sprocket where a one eighth inch chain is correct. Riders with narrower chains or gear shifting should not buy it.
Pros and cons
- Full length chain, ready to fit
- Single strand one eighth inch design
- Brown finish stands out
- One year warranty listed
- Pitch and roller figures look inconsistent
- Tensile load figure is low
- Link pin and coating details missing
Performance notes
A single speed chain runs in a straight line between one cog and one chainring, so wear depends on chainline and how tight it is set. Wider one eighth inch plates match single speed sprockets and fit tighter on them than narrow derailleur chains. The listed link count sets the length before any shortening.
Specifications
| Brand | KMC |
|---|---|
| Model | S1 |
| Dimensions & fit | |
| Roller Diameter | 8.6 millimeters |
| Weight | 12.96 ounces |
| Working load limit | 2.5E+2 N (56 lbf) |
| Construction & materials | |
| Material Type | Blend |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Strand Type | Single |
| Number of Links | 112 |
| Pitch | 1/8 inch |
Closest rivals on specs
Shimano HG40 116 W/CL Chain- Item Length 112 vs 155.9 inches (-28%)
SRAM PC-830 6/7/8-Speed Road/MTB Bike Chain 1/2" x 3/32" 114L fits Shimano Campy- Item Length 112 vs 57 inches (+96%)
Shimano SLX CN-M7100 SLX Chain with Quick Link- Item Weight 0.81 vs 0.66 pounds (+23%)
- Item Length 112 vs 63 inches (+78%)
Frequently asked questions
How do I fit the KMC S1 chain?
The listing gives no install guidance. It lists 112 links and a 1/8 inch width, so compare the length and width with your current chain and sprockets first.
Is the KMC S1 chain for geared bikes?
No. It is a single speed chain, listed as speed 1.
What color is the KMC S1 chain?
The listing names brown and black.