Info
We’ve always felt that most old MTBs are still perfectly good bikes underneath. The frame is solid, the geometry still great—it just needs a small update here and there to feel right again.
That’s where the ROLLCii BCD104 4-bolt 1X Chainring comes in.
Machined from a 4mm 7075-T6 alloy plate, it trims away the excess but keeps things solid where it counts.
The narrow-wide tooth profile helps keep the chain in place, and it works with most 9 to 12-speed chains from different brands. No complicated setup, no guessing.
Swap it on, go for a ride, and you’ll probably remember why you kept that bike in the first place.
