--- product_id: 3868560 title: "ACS Main Drive Single Speed Freewheel (16T x 1/8-Inch) | Gear" brand: "acs" price: "S$23" currency: SGD in_stock: true reviews_count: 9 category: "Acs" url: https://www.desertcart.sg/products/3868560-acs-main-drive-single-speed-freewheel-16t-x-1-8 store_origin: SG region: Singapore --- # 4-prong easy removal system 16-tooth precision gearing Durable chrome steel build ACS Main Drive Single Speed Freewheel (16T x 1/8-Inch) | Gear **Brand:** acs **Price:** S$23 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your ride with precision and style — don’t get left behind! ## Quick Answers - **What is this?** ACS Main Drive Single Speed Freewheel (16T x 1/8-Inch) | Gear by acs - **How much does it cost?** S$23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/3868560-acs-main-drive-single-speed-freewheel-16t-x-1-8) ## Best For - acs enthusiasts ## Why This Product - Trusted acs brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Chrome steel construction offers superior rust resistance for long-lasting rides. - • **Sleek Silver Finish:** Modern chrome plating adds a stylish edge to your BMX, perfect for both racing and street style. - • **Effortless Maintenance:** Traditional 4-prong threaded design allows quick installation and removal with common BMX tools. - • **Seamless Compatibility:** Fits standard 1/8" chains and 1.37" x 24tpi threaded cassette bodies for easy upgrades. - • **Precision Power Transfer:** 16-tooth design ensures smooth acceleration and reliable BMX performance. ## Overview The ACS Main Drive Single Speed Freewheel (16T x 1/8-Inch) is a high-precision, durable chrome steel BMX freewheel designed for smooth power transfer and aggressive riding. Compatible with standard BMX chains and hubs, it features a traditional 4-prong removal system for easy maintenance and a sleek silver finish that elevates your bike’s look while delivering reliable, rust-resistant performance. ## 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. Review: 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. Review: Smooth movement and much easier to wheelie - Works on my se big ripper nice. Has a nice click sound and smooth movement. ## 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005Z5AAOG | | Best Sellers Rank | #82,976 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #39 in Bike Cassettes & Freewheels | | Brand Name | ACS | | Color | Silver | | Customer Reviews | 4.6 4.6 out of 5 stars (410) | | Date First Available | July 25, 2011 | | Included Components | Single-Speed Freewheels | | Item Dimensions LxWxH | 2.75 x 2.75 x 0.75 inches | | Item Package Dimensions L x W x H | 2.95 x 2.8 x 0.87 inches | | Item Weight | 4 ounces | | Manufacturer | ACS | | Material | Alloy Steel | | Model Name | ACS Main Drive Freewheel 16T 1/8’’ Silver | | Number of Items | 1 | | Package Weight | 0.15 Kilograms | | Part Number | 63609-1000 | | Size | 16T X 1/8-Inch | | Style | Single-Speed Freewheels | | Suggested Users | unisex-adult | ## Product Details - **Brand:** ACS - **Material:** Alloy Steel - **Recommended Uses For Product:** low-torque applications, specifically for fixie bikes - **Roller Diameter:** 0.13 Inches - **Specification Met:** Value-priced Freewheels With Assured Quality for Everyday Use ## Images ![ACS Main Drive Single Speed Freewheel (16T x 1/8-Inch) | Gear - Image 1](https://m.media-amazon.com/images/I/71LcAq63ZCL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect replacement for my 1987 Schwinn Predator Free Form EX *by S***N on August 19, 2024* 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. ### ⭐⭐⭐⭐⭐ Smooth movement and much easier to wheelie *by R***0 on April 17, 2026* Works on my se big ripper nice. Has a nice click sound and smooth movement. ### ⭐⭐⭐⭐⭐ Good buy, definitely recommend. *by A***R on June 1, 2021* 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. ## Frequently Bought Together - ACS Main Drive Single Speed Freewheel (16T x 1/8-Inch) - BELL Standard Bicycle Inner Tube, 20" x 1.75" - 2.125", Black - Wheel Set 20 x 1.75 Wheel Master Silver, 36H, BMX 3/8 FW Hub, 14g UCP Spokes --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/3868560-acs-main-drive-single-speed-freewheel-16t-x-1-8](https://www.desertcart.sg/products/3868560-acs-main-drive-single-speed-freewheel-16t-x-1-8) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-12*