Myccymt 170mm Left Bike Crank Arm — Aluminium Alloy, Polished Finish (Black or Silver, Square/Rhombic)

Myccymt 170mm left crank arm — a lightweight, durable aluminum replacement designed for electric, folding, hybrid, mountain and road bicycles.

This single left-side crank arm is crafted from aluminium alloy and finished with a polished paint to combine strength, low weight and a clean look. Offered in four color-and-hole-shape options, the arm measures approximately 20.5 cm total length with a 170 mm hole distance and weighs about 200–214 g. It’s intended as a straightforward swap for riders who need a reliable crank arm that matches a variety of bike styles.

How does this crank arm stand up to regular riding?

The Myccymt crank arm uses an aluminium alloy construction for high axial strength and long-lasting performance under normal cycling loads. The surface receives fine polishing and paint to resist corrosion and maintain appearance over time. While not a high-end CNC racing piece, it provides dependable durability for daily commuting, trail riding and folding-bicycle use.

• Material: aluminium alloy for strength-to-weight balance
• Finish: polished and painted for corrosion resistance
• Weight: approximately 200–214 g for a lightweight feel
• Intended use: electric, folding, hybrid, mountain, road bikes

What are the exact specifications and fit details?

This crank arm is designed specifically for the left side and offers a 170 mm hole-to-spindle center distance. The total measured length is about 20.5 cm (8.07 in). It’s available in four variants combining two colors (black or silver) with two hole shapes (square or rhombic) to match different spindle interfaces and aesthetic preferences.

• Side: left only
• Crank length: 170 mm hole distance; total length ≈ 20.5 cm
• Options: black-square, black-rhombic, silver-square, silver-rhombic
• Weight range: approx. 200–214 g

Is installation difficult and what tools are needed?

Installation is straightforward for anyone familiar with basic bike maintenance. The lightweight arm fits common spindle types corresponding to the chosen hole shape; use the correct crank bolt and a torque wrench to secure it to manufacturer torque specs. If you’re unsure about compatibility with your bottom bracket or chainring bolts, consult your bike manual or a local bike mechanic.

• Tools: crank puller or appropriate removal tool, hex/Allen keys, torque wrench
• Procedure: remove old crank, match hole shape to spindle type, fit and tighten to spec
• Tip: ensure chainring bolts don’t interfere with crank arm length

What colors and spindle hole shapes are available to match my bike?

Choose between black or silver finishes, each offered with either a square or rhombic hole to accommodate common spindle interfaces. The polished paint gives a clean, modern appearance that works on performance and commuter bikes alike. Select the option that matches your existing spindle and color preference to maintain drivetrain geometry and visual continuity.

• Black - square hole: standard square-taper spindles
• Black - rhombic hole: alternative spindle profile fit
• Silver - square hole: bright finish for classic looks
• Silver - rhombic hole: polished look with alternate fit

Who is this crank arm for? Riders seeking a cost-effective, sturdy left-side replacement or upgrade will appreciate the Myccymt 170mm crank arm. It fits cyclists with electric, folding, hybrid, mountain and road bikes who need a reliable aluminum arm with a polished finish and clear fit options. If you require a complete crankset, proprietary axle interface, or race-weight titanium arms, consider those specialized options instead; this product is optimized for broad compatibility and everyday performance.