Speedline Parts | CNC'd Alloy Mini BMX Racing Cranks

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These high-quality billet 7075 aluminum CNC cranks have a decade’s worth of winning heritage behind them. These 7075 billet arms are Precision CNC'd in North America and use a removable 5-bolt spider included , or the Answer 1-piece chain wheel, or the optional ( sold separately)  Speedline 104mm 4-bolt spider pictured above. The Speedline SX Mini Cranks have the highest strength-to-weight ratio of any mini crank on the market. These are currently available at Speedline dealers worldwide.

Available in 115, 120, 125, 135, 140, and 145 lengths.

Available in an aerospace Black Anodize with a replaceable 5-Bolt Spider.

Fits all Std. JIS Square Taper Bottom Brackets. ( see the Speedline sealed Bearing BB kit to complete your set )

The 145mm set weighs in at 329 Grams ( 11.6 ounces ) for the 2 Crank Arms, the 5 Arm Spider and the 4 Spider Retaining Bolts.

115mm  266 grams ( 9.4 ounces )

120mm  275 grams ( 9.7 ounces )

125mm  283 grams ( 10.0 ounces )

130mm 306 grams ( 10.8 ounces )

135mm  312 grams ( 11.0 ounces )

140mm  316 grams ( 11.2 oz ounces )

For larger riders, please check our new 2 pc Forged Aluminum Expert Crank, or our Hollow Carbon Pro BMX Racing Crank.

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