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DECKAS 104BCD Narrow Wide MTB Chainring (Round)

Upgrade your mountain bike's drivetrain with the second-generation DECKAS 104BCD Narrow Wide Chainring. Fully CNC-molded from premium aluminum alloy, this chainring boasts a refined sanded surface finish and features significant optimizations over the first generation to deliver peak functionality on the toughest trails.

Compatible with almost all bicycle chains on the market, this versatile upgrade supports 7 to 12-speed setups. Whether you prefer the traditional consistent power delivery of a round chainring (DCW-041) or the bio-mechanical efficiency of an oval chainring (VCW-041), DECKAS provides a durable, lightweight solution to keep your chain locked in place.

BCD Measurement Check: Please confirm your crankset uses a 104mm BCD (the diameter of the circle formed by the center points of the four chainring holes). Incorrect measurements will result in incompatibility.

Hardware Notice: The chainring holes adopt a non-sinking design. You can conveniently use your existing three-plate or two-plate chainring bolts without needing to purchase separate single-plate hardware.

Key Features

Advanced Mud Grooves: A newly added mud groove at the root of the teeth effectively prevents sludge and debris accumulation in adverse weather.
Optimized Tooth Profile: The alternating long and short (positive/negative) tooth design perfectly aligns with the actual chain wear ratio, drastically enhancing the anti-chain drop effect.
Precision CNC Machined: Crafted from a single piece of lightweight aluminum alloy for maximum strength-to-weight ratio and durability.
Broad Compatibility: Seamlessly accommodates 7 to 12-speed drivetrains and integrates with nearly all major bicycle chain brands.

Technical Specifications

Brand / Models	DECKAS / DCW-041 (Round)
Material & Finish	Aluminum Alloy with Sanded Surface
Bolt Circle Diameter (BCD)	104mm
Speed Compatibility	7, 8, 9, 10, 11, and 12-Speed
Round Weights	30T (37g) / 32T (39g) / 34T (48g) / 36T (58g) / 38T (72g)

Package Contents

1 x DECKAS 104BCD Chainring (Shape and Tooth Count as per selection)

Crankset Compatibility Guide

Shimano Cranks: Compatible with SHM370, M390, M430, M590, M610, M615, M670, M675, M770, M780, M785, M980, M640, and M820.
SRAM Cranks: Compatible with X5, X7, and X9 triple cranksets.