PATHGNAR 170mm Square-Taper Ebike Crank Arm, 6061 Forged Aluminum, Black — Size EB04-Crankarm 170mm

PATHGNAR's 170mm square-taper ebike crank arm is a forged 6061 alloy replacement crank built for durable, high-strength pedaling on compatible electric bicycles.

This single crank arm is designed specifically for electric bikes that use a square-taper spindle interface. Machined from forged 6061 aluminum, it combines stiffness and impact resistance to withstand e-bike torque while keeping weight low. The arm is available in a 170mm length and comes finished in black, with clear left and right markings for correct installation.

How do I know this crank arm will fit my ebike?

Compatibility hinges on two simple checks: spindle interface and crank length. This PATHGNAR crank uses a square-taper spindle, so confirm your bike’s axle is square-tapered and you need a 170mm arm. Also ensure the arm is intended for an e-bike application rather than a specific road or MTB spline system.

• Confirm spindle type: square taper required
• Confirm required arm length: 170mm
• Intended use: electric bicycle crank replacement
• Check left/right orientation markings before install

What materials and strength can I expect from this crank?

The PATHGNAR crank arm is forged from 6061 aluminum alloy, a common high-strength bike material that balances rigidity and light weight. Forging improves grain structure and durability compared with cast alternatives, so the arm resists bending and maintains pedal feel under higher loads typical of e-bike motors.

• Forged 6061 alloy for improved toughness and fatigue life
• High hardness to minimize deformation under torque
• Black finish for corrosion protection and aesthetic match
• Left/right-specific stamping to ensure correct fit

How should I install and maintain the PATHGNAR crank arm?

Installation requires matching left (L) and right (R) arms to their respective sides and seating onto a square-taper spindle. Tighten the crank bolt to the manufacturer torque spec and check chainline. If you’ve previously replaced a crank, consider the bottom bracket condition—many units need replacement after multiple crank swaps.

• Match L and R markings to correct sides
• Tighten to recommended torque for your bike
• Replace bottom bracket if it shows wear or after multiple crank changes
• Contact PATHGNAR support for fit or installation help

Will this crank arm perform under ebike loads and rough use?

Designed for electric bicycle applications, the forged 6061 construction provides strong pedal transfer and resistance to deformation under higher torque. While robust, performance depends on proper installation and a compatible bottom bracket; mismatched interfaces or worn bearings reduce longevity. PATHGNAR offers customer support if you encounter fitment or durability questions.

• Engineered for e-bike torque when used on square-taper spindles
• Durable finish and forging reduce wear and surface damage
• Replace related components (bottom bracket) as recommended
• Support available for troubleshooting and returns

Who is this for? The PATHGNAR 170mm square-taper crank arm suits riders restoring or upgrading electric bicycles that use a square spindle and require a 170mm arm. It’s aimed at DIY mechanics, ebike repair shops, and riders who prioritize a durable, forged alloy replacement in a sleek black finish. If you need a crank built specifically for spline or integrated axle systems, choose a product made for those interfaces instead; if you’re unsure about fitment, measure your spindle and consult PATHGNAR support before purchase.