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Price
$35.99
Single Speed Bike Freewheel Cog 16T 18T, CNC Aluminum Alloy Lightweight Conversion Kit with Spacers and Lockring for MTB Fixed Gear Hubs, Secure Fit Reduces Wobble(Red-18T) โ€” image 1
Cassettes & FreewheelsEfforPracโœ“ In stock

Single Speed Bike Freewheel Cog 16T 18T, CNC Aluminum Alloy Lightweight Conversion Kit with Spacers and Lockring for MTB Fixed Gear Hubs, Secure Fit Reduces Wobble(Red-18T)

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$35.99

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About this item
  • Complete Freewheel Set: Includes 1 x freewheel cog (16T or 18T), precision-machined spacer rings, and a LONGLASTING lockring - all in one ready-to-install package.
  • Optimized Gear Ratio Options: Choose between 16T for higher speed and responsiveness or 18T for balanced acceleration and control - perfect for urban commuting, track training, or casual riding.
  • Lightweight CNC Aluminum Construction: Made from aerospace-grade aluminum alloy for reduced rotational weight while maintaining for rigidity and long-term performance under repeated torque loads.
  • Secure Fit & Reduced Wobble: Tight-tolerance threading and concentric design minimize lateral movement on the hub, enhancing pedaling efficiency and drivetrain smoothness.
  • general Freewheel Compatibility: Designed to fit standard ISO-threaded freewheel hubs used on single-speed, fixed-gear, and conversion bikes - verify your hub threading before installation.
Product description

Features: *Compatible with standard freewheel hubs for single-speed or fixed-gear bikes *Available in 16-tooth or 18-tooth options for different gear ratios *Made of CNC aluminum alloy for lightweight strength and durability *Includes spacer rings and lockring for secure installation and alignment *Tight fit design reduces wobble and improves power transfer Specifications: *Product Name: Single Speed Bike Freewheel / Cog *Material: Aluminum alloy *Size: 34.55*78.8mm / 34.55*70.2mm *Tooth Count: 16T, 18T *Color Options: Black, Red, Blue, Purple *Type: Freewheel cog with spacers and lockring Package Content: 1 x Single Speed Freewheel Set (cog, spacers, lockring)

Product details
Brand
EfforPrac
Manufacturer
EfforPrac
Material
Aluminum alloy
Colour
as picture show
Size
Red-18T
Weight
0.09 kg
Model number
ZU5YF2C0O92SY39C1N5C9MDZTLH
Part number
ZU5YF2C0O92SY39C1N5C9MDZTLH

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
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Excellent
4.5 average rating
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S
Sigalit
๐Ÿ‡ฎ๐Ÿ‡ฑ ยท January 2026
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I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
๐Ÿ‡ฆ๐Ÿ‡บ ยท November 2025
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The package was here in Australia from England in a few days โ€” so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

Showing 1โ€“2 of 10 reviews

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Single Speed Bike Freewheel Cog 16T 18T, CNC Aluminum Alloy Lightweight Conversion Kit with Spacers and Lockring for MTB Fixed Gear Hubs, Secure Fit Reduces Wobble(Red-18T) | Bigamart