Shimano RX100 Biopace 170 mm right crank

The Shimano RX100 FC-A550 right crank arm is a replacement component designed for road bikes equipped with a square-taper bottom bracket. Made from aluminium, it features two Shimano Biopace-SG oval chainrings with 42 and 52 teeth, suitable for a 7-speed drivetrain.

With its 170 mm crank length and standard international 9/16" x 20 TPI pedal thread, this crank arm is a suitable option for repairing or restoring a compatible road bike.

Shimano RX100 FC-A550 right crank arm specifications

• Brand: Shimano

• Series: RX100

• Model reference: FC-A550

• Type: Right crank arm with chainrings

• Material: Aluminium

• Crank length: 170 mm

• Chainrings: 2 Shimano Biopace-SG oval chainrings

• Chainring sizes: 42 and 52 teeth

• Drivetrain: 7-speed

• Bottom bracket compatibility: Square-taper spindle

• Chainring bolt circle diameter (BCD): 130 mm

• Pedal thread: 9/16" x 20 TPI, international standard

A Shimano crank arm for road bikes

The Shimano RX100 FC-A550 right crank arm is designed for setups compatible with square-taper bottom brackets. Its 42/52T Shimano Biopace-SG oval chainrings are suitable for maintaining a traditional road bike drivetrain configuration.

Its 170 mm crank length and 130 mm chainring bolt circle diameter are important specifications to check before purchasing to ensure compatibility with your existing setup.

Condition and important information before purchase

This Shimano RX100 FC-A550 right crank arm is new and supplied without its original packaging. Signs of oxidation are present on the inner side and around the pedal mounting area.

Please carefully check the product photos to assess its cosmetic condition before placing your order.

Compatibility: check your crankset before buying

Before purchasing this Shimano crank arm, please check the following:

• Compatibility with a square-taper bottom bracket.

• Required crank length: 170 mm.

• Drivetrain compatibility: 7-speed.

• Chainring bolt circle diameter (BCD): 130 mm.

• Pedal thread: 9/16" x 20 TPI.

Checking these specifications will help ensure that you select a component compatible with your bike and existing crankset.