Stone 100BCD Round MTB Chainring for Shimano SLX M7100 M7120 M7130, XT M8100 M8120 M8130 Crankset, Narrow Wide 32T-48T
The BCD100 single chainring is a special specification. Shimano original chainring come in two different specifications, although they look the same. If your original chainring is 28T or 30T, this chainring is not compatible.
A T15 Torx wrench is required to remove the bolts from the original chainring. Before placing an order, please test whether the original chainring can be disassembled. If it can be removed successfully, you can then place an order for the replacement chainring.
We only provide the chainring. Chainring bolts are not included, the bolts need pay seperately.
Product Description:
This Stone 100BCD round chainring is designed for Shimano 12-speed MTB cranksets with 100BCD mounting. Made from high-strength 7075-T651 aluminum alloy and precisely CNC-machined, it provides excellent stiffness, durability, and reliable performance for 1x MTB drivetrain setups.
The narrow-wide tooth profile improves chain retention, helps reduce chain drop on rough terrain, and provides smooth, stable riding performance. It is suitable for 9 / 10 / 11 / 12-speed chains. (Compatible with Shimano 12-speed chains and SRAM MTB 12-speed chains.)
Important Compatibility Notice:
Compatible crankset models:
– For Shimano SLX M7100 / M7120 / M7130
– For Shimano XT M8100 / M8120 / M8130
Not compatible with:
– Not for Shimano Deore M5100
– Not for Shimano Deore M6100
– Not for Other cranksets not listed above
Please confirm your crankset model before purchase.
Specifications:
Brand: Stone
BCD: 100BCD
Shape: Round
Material: Aluminum 7075-T651
Material Hardness: HB150
Thickness: 4mm
Finish: Black anodized
Surface Treatment: Anodizing
Processing: High-speed CNC machining
CNC Precision: 0.03mm
Tooth Profile: Narrow Wide
Tooth Options: 32T / 34T / 36T / 38T / 40T / 42T / 44T / 46T / 48T
Chain Compatibility: 9 / 10 / 11 / 12-speed chains (Compatible with Shimano 12-speed chains and SRAM MTB 12-speed chains.)
Drivetrain Use: 1x only
Front Shifting: Not supported
Important Note:
This is a narrow-wide chainring designed for 1x drivetrain systems only.
It cannot be used as a 2x chainring and does not support front derailleur shifting.
Shimano 12-Speed Road Chain Quick Link Notice:
If you use a Shimano 12-speed road bike chain, please replace the original Shimano 12-speed road quick link with another brand 12-speed quick link, such as KMC, YBN, SUMC, or similar.
The original Shimano 12-speed road quick link may be too narrow and may affect compatibility.
Size / Max Diameter / Weight:
32T – 138mm – 52g
34T – 145mm – 58g
36T – 154mm – 60g
38T – 162mm – 66g
40T – 170mm – 72g
42T – 178mm – 79g
44T – 186mm – 88g
46T – 194mm – 96g
48T – 202mm – 105g
Features:
– Designed for Shimano 100BCD MTB cranksets
– Narrow-wide tooth design for improved chain retention
– Helps reduce chain drop during off-road riding
– Suitable for 1x MTB drivetrain setups
– Supports 9 / 10 / 11 / 12-speed chains
– Compatible with Shimano and SRAM MTB 12-speed chains
– High-strength 7075-T651 aluminum alloy construction
– CNC-machined with 0.03mm processing accuracy
– Black anodized finish for improved durability and corrosion resistance
– Lightweight, strong, and reliable for mountain bike riding
Package Includes:
1 x Chainring
Bolts are not included. Please use the original crankset bolts for installation.
Production Notice:
default does not come with bolts
the 8pcs bolts need buy seperately
Most Stone chainrings are produced to order. Please allow 3-5 days for production and preparation before shipping. Thank you for your understanding.
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