Whether you're building up your first mountain bike or looking to replace an old, worn out crankset, the SRAM NX 1x BB30 Crankset features trickle down technology from SRAM's top tier offerings at an affordable price that will leave some cash in the bank for rent and a few post ride pizza gatherings. The crank arms are fashioned from light, stiff, and durable aluminum for confident and efficient power transfer from the pedals. At the center, a forged alloy spider provides a durable yet lightweight platform to power forward while the SRAM X SYNC chainring brings some extra chain retention features to the table and make this crankset really hum. The chainring features a distinctly tall and squared off tooth shape that catches the chain earlier in the pedal rotation than standard triangular teeth for improved chain stability and retention. A narrow, sharp profile with rounded chamfer edges also helps with chain retention, especially in minimizing chain deflection and just generally helps keep the chain on track. SRAM also kept unexpectedly muddy conditions in mind, and includes recesses that help clear mud to move the chain swiftly through its rotation for smooth power transfer without any distracting catches or mud sucks. The SRAM NX 1x BB30 Crankset is compatible with BB30 equipped framesets.