For maximum pedaling efficiency, Shimano's 105 Compact Crankset boasts light, strong and stiff hollow, cold forged-aluminum arms, plus an integrated oversize-steel axle. The compact chainrings are also made of cold-forged aluminum and are ramped and pinned for quick, precise shifting.

You'll always find the perfect gear with Shimano's Tiagra Crankset. It's crafted from aluminum for low weight and efficient power transfer, while the integrated axle furthers both of those attributes. It shifts positively as well with ramped and pinned SG-X chainrings that boost shifting speed and precision. Options: - Standard Double (52/39) - Compact Double (50/34) - Triple (50/39/30)

Origin-8's Track/SS Crankset is made of light and durable forged aluminum. It has a fine machined-aluminum 46-tooth chainring for super-smooth pedaling and comes in a variety of colors to make your bike the coolest ride on the block.

- Series: SLX - Crank Construction: HOLLOWTECH II Technology

- Forged steel - 24 TPI

• Square taper interface • Only includes left crank

- Horizontal square interface - Only includes left crank

Problem Solvers Crank Arm Fixing Bolts - 8mm - Sold as a pair