BUCKLOS replacement e-bike crank arm Diamond Crank Left+Right 170mm, forged aluminum, corrosion-resistant

BUCKLOS aluminum crank arms are durable, lightweight replacement crank arms for e-bikes and mountain bikes, available in 152mm, 170mm, and 175mm with square or diamond interfaces.

Engineered from a premium forged aluminum alloy, this crank arm line from BUCKLOS offers a straightforward, reliable option when you need to replace worn or damaged arms on electric bikes, mountain bikes, folding bikes, or exercise bikes. Multiple interface choices and three length options give you flexibility to match your drivetrain and riding style. These arms are finished for corrosion resistance and precision-drilled to fit standard cranks for a hassle-free swap.

What sizes and interface types are available for BUCKLOS crank arms?

BUCKLOS provides three crank length choices — 152mm, 170mm, and 175mm — to suit different leg reach and pedaling cadence. Two interface types are offered: a square-taper mounting and a diamond (splined) mounting, so you can select the version that matches your bottom bracket and chainring assembly.

• Lengths: 152mm, 170mm, 175mm for varied pedaling geometry
• Interfaces: square-taper or diamond/spline mounting
• Sold as single left arm or as a matched pair where applicable

How does installation work and what tools will I need?

These crank arms are precision-cut to standard tolerances for a straightforward fit on compatible spindles. Installation is generally simple: remove the old arm, align the interface, slide on the new arm, and torque to manufacturer specs. No exotic tools are required for most setups.

• Standard hex or crank puller tools may be used depending on existing setup
• Follow torque specifications and thread-lock guidance if recommended
• Easy swap for home mechanics and bike shops alike

Which bikes and riding styles are these crank arms suited for?

BUCKLOS crank arms are designed for broad compatibility: electric bicycles, mountain bikes, folding bikes, fixed-gear builds, and stationary exercise bikes. The forged aluminum construction keeps weight low while maintaining strength for everyday riding and light off-road use.

• Good for commuting, trail riding, and general e-bike use
• Appropriate as a cost-effective replacement or spare part
• Not intended as a specialized racing or extreme downhill component

What should I check before ordering to ensure correct fit?

Confirm both the crank interface type (square-taper or diamond/spline) and the desired crank length before purchase. Note that a paired set is required for full two-arm replacements on electric bikes, and compatibility with your current bottom bracket must be verified.

• Measure current crank length or consult bike geometry when choosing 152/170/175mm
• Verify your bottom bracket spindle style matches square or diamond interface
• Order a single arm only when replacing one side; choose a pair for complete replacements

Who this product is for: Riders and mechanics seeking a durable, affordable replacement crank arm with clear size and interface options. Ideal for e-bike owners, mountain bikers, folding-bike users, and home workshop projects who need reliable alloy arms that balance light weight with everyday strength. If you need precise matching to your bottom bracket or are building a high-performance race bike, verify compatibility or consult your mechanic first.