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ACS

ACS Main Drive Single Speed Freewheel (16T x 1/8-Inch) | bike-cassettes-and-freewheels

  • Based on 413 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Aug 5
Order within 17 hours and 12 minutes
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Features

  • High-precision 16-tooth freewheel designed for BMX bikes, ensuring reliable power transfer and smooth acceleration during aggressive riding sessions.
  • Constructed from durable chrome steel, this freewheel offers enhanced rust resistance and long-lasting performance in harsh riding conditions.
  • Compatible with 1/8" chain and threaded standard cassette bodies (1.37" x 24tpi), making it an easy upgrade or replacement for BMX and stunt bikes.
  • Features traditional threaded freewheel design with a 4-prong removal system, enabling effortless installation and maintenance with common BMX tools.
  • Stylish silver chrome finish adds a sleek, modern look to your bike, making it suitable for both race-focused and recreational BMX use.

Description

Basic OEM replacement freewheel for most low-torque applications. Fits regular hub threads (1.375" - 24tpi), and standard 1/2" x 1/8" bicycle chains. Removable with ACS 4-prong or other universal removal tools. Chrome plated.

Item Package Dimensions L x W x H: ‎2.95 x 2.8 x 0.87 inches


Package Weight: ‎0.15 kg


Item Dimensions LxWxH: ‎2.75 x 2.75 x 0.75 inches


Item Weight: ‎4 ounces


Brand Name: ‎ACS


Color: ‎Silver


Material: ‎Alloy Steel


Suggested Users: ‎unisex-adult


Number of Items: ‎1


Manufacturer: ‎ACS


Part Number: ‎63609-1000


Style: ‎Single-Speed Freewheels


Included Components: ‎Single-Speed Freewheels


Size: ‎16T X 1/8-Inch


Date First Available: July 25, 2011


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Perfect replacement for my 1987 Schwinn Predator Free Form EX
Headline says it all, this is a perfect factory replacement for my old school BMX. Old one still spun but was crunchy while pedaling. Drivetrain is nice and quiet now. I knew it had to be the freewheel as I had just redone all the bearings in the bike front to back and replaced the chain. The only way I can see someone being dissatisfied with this part is if they ordered it unnecessarily. Might grab an extra for the parts bin. ... show more
Reviewed in the United States on August 19, 2024 by S. Dillon

  • Smooth movement and much easier to wheelie
Works on my se big ripper nice. Has a nice click sound and smooth movement.
Reviewed in the United States on April 17, 2026 by Rena G550

  • Good buy, definitely recommend.
Mine had no defects? Easy to install, needed to buy tool to install. Also around same price, I put them on Skyway Tuff 2. I have on an old school late 80’s Haro bike. Made bike look good, sound good, I would recommend this part.
Reviewed in the United States on June 1, 2021 by Amazon Customer

  • Good value for the money
You need a special tool to install this unless you have some type of welder
Reviewed in the United States on July 8, 2020 by john

  • Spin free
Great product!
Reviewed in the United States on June 2, 2025 by Eric Ruffin

  • Great as usual ACS is good stuff
Has good old fashioned freewheel sound
Reviewed in the United States on February 2, 2025 by Frederick S.

  • Good replacement freewheel hub.
Good replacement freewheel hub.
Reviewed in the United States on December 11, 2024 by Andrew

  • so-so, quality.
It looks shiny chrome. And then when you look closer, it looks like its coated with aluminum foil. I'm surprised its not made of plastic underneath the foil. Buuut,, you get what you pay for!
Reviewed in the United States on March 2, 2021 by Werx4me!

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