104 BCD Chainring 40T To 52T CNC 7075 Aluminum Narrow Wide Round Design For MTB Road Ebike Grippy Chain Retention 7 To 12 Speed Compatible Durable Black Chainwheel

104 BCD CNC Aluminum Narrow-Wide Chainring 40-52T for MTB
✔️ Fits 7-12 speed drivetrains, 4-bolt 104mm BCD, 7075 alloy

This 104 BCD chainring is CNC machined from 7075 aluminum and features a narrow-wide tooth pattern to help keep the chain secure on rough terrain. It's designed to fit 4-bolt cranks and supports 7-12 speed drivetrains, making it a solid upgrade for MTB, road, and e-bike setups.

✅ Material: 7075 aluminum
✅ BCD: 104mm (4-bolt)
✅ Tooth pattern: Narrow-wide
✅ Sizes: 40T-52T
✅ Speed compatibility: 7-12 speed
✅ Includes: 4 chainring bolts

💡 What is a 104 BCD chainring used for on mountain and road bikes?

A handy quick guide for riders.

- 104 BCD matches 4-bolt cranksets with a 104mm circle - Narrow-wide tooth design helps prevent chain drops on rough terrain - Works with 7-12 speed drivetrains for flexible gearing - 40T-52T range provides multiple gearing options