9 Speed Bicycle Crankset With Chain Guard 39T Single Ring 170mm Aluminum Arms 130mm BCD Includes BB Black For Commuter City Bike Urban Touring Upgrade

9-Speed Crankset 39T Single Ring with 170mm Aluminum Arms
✔️ Single-unit crankset with 39T, 170mm arms, 130mm BCD, 68mm BB included

This city bike crankset upgrade is built for urban commuting and light touring, offering a 39T single chainring on 170mm aluminum arms. It’s designed for 8- and 9-speed drivetrains and includes an outbound BSA bottom bracket compatible with 68mm road frames for easy installation.

✅ 39T single chainring with 130mm BCD for efficient power transfer
✅ 170mm crankarm length for comfortable pedaling on city rides
✅ 42.7mm chainline optimized for road disc hubs and short stays
✅ Includes outbound BSA bottom bracket for 68mm road frames
✅ Durable aluminum arms with integrated chainguard for daily use
✅ 8/9-speed drivetrain compatibility for city commuting and urban touring

💡 What is a city bike crankset with a 39T chainring good for in daily commuting?

This handy setup keeps front gearing simple and reliable.

- 39T chainring optimized for urban cadence - 170mm crankarms deliver comfortable pedal stroke - 42.7mm chainline improves clearance for road hubs - 68mm BSA bottom bracket simplifies installation