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ultra‑light square crank 170mm 170mm Ultra‑Light Square Crank CNC 130mm BCD Aluminum for Single‑Speed Folding Bike BMX
bicycle flat pedals 3 bearings Aluminum Alloy Bicycle Platform Pedals 3‑Bearing Lightweight for Road MTB BMX

170mm Aluminum Single Crank Arm CNC 130mm BCD Lightweight for MTB Road Brompton

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$32.12

SKU: K-CRA521 Brand:

• 170mm Crank Arm – Ideal length for pedaling balance and leverage.
• CNC Machined Aluminum – Lightweight yet durable construction.
• 130mm BCD Compatibility – Works with standard 130mm bolt circle chainrings.
• Universal Fit – Suitable for MTB, road and Brompton folding bikes.
• Square Taper Design – Fits square taper bottom bracket systems.

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Description

Product Overview

This 170mm aluminum single bike crank arm is precisely CNC machined and designed with a 130mm BCD interface for single chainring setups. The lightweight alloy construction provides excellent strength and durability while keeping weight low, making it a great upgrade or replacement part for mountain bikes, road bicycles and folding bikes like Brompton.

Technical Specifications

  • Crank Arm Length: 170mm

  • Bolt Circle Diameter: 130mm BCD

  • Material: CNC Machined Aluminum Alloy

  • Design: Single Crank Arm

  • Compatibility: MTB / Road / Folding / Brompton Bikes

  • Drivetrain Type: Single Speed

  • Bottom Bracket: Square Taper

  • Color: Black / Silver (may vary)

Package Includes

  • 1 × Aluminum Single Crank Arm (170mm)

  • 1 × Chainring Mounting Hardware Set (if included)

How To Use

  1. Remove the existing crank arm from the square taper bottom bracket.

  2. Slide the new 170mm crank arm onto the bottom bracket spindle.

  3. Ensure the crank arm is aligned correctly.

  4. Tighten the fixing bolt to recommended torque specs.

  5. Attach your chosen 130mm BCD chainring and secure it.

  6. Test smooth rotation before riding.

Additional information

Weight N/A
Color

Black, Sliver
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Description

Product Overview

This 170mm aluminum single bike crank arm is precisely CNC machined and designed with a 130mm BCD interface for single chainring setups. The lightweight alloy construction provides excellent strength and durability while keeping weight low, making it a great upgrade or replacement part for mountain bikes, road bicycles and folding bikes like Brompton.

Technical Specifications

  • Crank Arm Length: 170mm

  • Bolt Circle Diameter: 130mm BCD

  • Material: CNC Machined Aluminum Alloy

  • Design: Single Crank Arm

  • Compatibility: MTB / Road / Folding / Brompton Bikes

  • Drivetrain Type: Single Speed

  • Bottom Bracket: Square Taper

  • Color: Black / Silver (may vary)

Package Includes

  • 1 × Aluminum Single Crank Arm (170mm)

  • 1 × Chainring Mounting Hardware Set (if included)

How To Use

  1. Remove the existing crank arm from the square taper bottom bracket.

  2. Slide the new 170mm crank arm onto the bottom bracket spindle.

  3. Ensure the crank arm is aligned correctly.

  4. Tighten the fixing bolt to recommended torque specs.

  5. Attach your chosen 130mm BCD chainring and secure it.

  6. Test smooth rotation before riding.

Leave your review
Rating
Publish review

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