Upgrade your mountain bike with this sleek hollow integrated crankset. It’s a one-piece design (crank arms and spindle are one unit) made from lightweight aluminum alloy, so it’s strong and saves weight – the whole set is about 675 grams. Crank arm length is 170mm, and it uses a 104 BCD (bolt circle diameter). You get a single-speed narrow-wide chainring (choose 32, 34, or 36 teeth) that grips the chain tight to prevent drops on rough trails. The hollow axle and internal weight reduction design make it stiff and efficient for better power transfer. Important: This is for SINGLE-SPEED setups only, not for derailleur gears. It’s a great affordable upgrade for single-speed MTB builds, BMX conversions, or urban fixie-style bikes. Just make sure your bottom bracket is compatible (it uses a standard threaded square taper interface).
