Shimano 105 left crank

Shimano 105 FC-1050 crank arm: a vintage component that still performs

In the world of road cycling, some components stand the test of time, maintaining their appeal and reliability decades after their release. The Shimano 105 FC-1050 crank arm is one such piece—an iconic component from the late '80s that continues to find its place on classic road bikes. If you're looking for a reliable left crank arm compatible with vintage double cranksets, this model deserves your attention.

A crank arm built to last

The Shimano 105 crank arm FC-1050 belongs to the 105 series—a mid-range Shimano group designed to strike the perfect balance between performance, durability, and affordability. This specific model, released in the late 1980s, was aimed at serious road cyclists who wanted a robust crankset without paying Dura-Ace prices.

Crafted from forged aluminum, this left crank arm combines light weight and strength. It features a polished finish typical of that era, offering a retro aesthetic that still appeals to vintage bike enthusiasts.

Shimano 105 FC-1050 crank arm specifications

• Model: FC-1050 (Shimano 105, 1050 series)

• Position: left crank arm (no chainring)

• Material: forged aluminum

• Length: commonly available in 170 mm or 172.5 mm

• Crankset type: double chainring

• Interface: square taper (JIS type)

• Compatibility: square taper bottom brackets, standard 9/16" pedal thread

• Finish: polished aluminum, sometimes grey anodized

This crank arm fits perfectly into a full Shimano 105 FC-1050 crankset, but can also serve as a replacement for other square taper cranksets from the same era.

Why choose a vintage Shimano 105 crank arm ?

Restoring a classic road bike requires attention to detail. The Shimano 105 left crank arm FC-1050 is an ideal solution for preserving the original performance and aesthetic of your vintage ride. Whether you’re a collector or a retro cycling enthusiast, this part helps you maintain the authenticity of your setup.

Thanks to its compatibility with standard square taper bottom brackets, it’s easy to install and works with many traditional steel bike frames.

Conclusion

The Shimano 105 crank arm FC-1050 remains a solid choice for anyone maintaining or restoring a classic road bike. Strong, stylish, and functional, it represents Shimano’s craftsmanship from a time when mechanical simplicity meant long-lasting reliability. If you're in need of a quality left crank arm for a vintage crankset, this model is a go-to reference.