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Product Description
ROLLCii 1X Chainring 38T, BCD104 4-Bolt, 7075-T6 Aluminum, Polish Silver
Part of Veloci Cycle's ROLLCii precision-parts line, this is a dedicated 1x narrow-wide chainring built for 104mm BCD, 4-bolt crank spiders — a straightforward way to convert an older mountain bike drivetrain to a simpler, more reliable 1x setup. CNC machined from a 4mm-thick 7075-T6 aluminum plate, it's non-directional and mounts to either side of the spider.
The narrow-wide tooth profile keeps the chain seated over rough terrain, and it's compatible with most 9 to 12-speed chains across brands, so it drops onto most existing 1x or converted drivetrains without a special chain.
- Tooth count: 38T
- Bolt circle diameter (BCD): 104mm, 4-bolt
- Material: 7075-T6 aluminum, CNC machined from 4mm plate
- Finish: Polish silver
- Chain compatibility: Most 9-12 speed chains
- Non-directional: fits either side of the spider
- Chainring bolt requirement: 6mm (not included)
- Reference weight: 67g at 38T
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