The best single speed cassette conversion kit simplifies turning a multi-speed hub into a reliable single-speed setup. This guide highlights five well-suited kits for different bike types and riding goals. It helps riders decide who benefits most from each kit, whether road, mountain, BMX, or dirt-jump bikes. Expect clear differences in spacer sets, base thickness, and compatibility with Shimano or Sram HG hubs. A quick buyer’s table below summarizes the top picks for fast reference.
| Brand | |||
|---|---|---|---|
| Bibike | Single Speed Conversion Kit (13T–22T) | 13T–22T | Road and mountain bikes needing multiple sizing options |
| CyclingDeal | Single Speed Conversion Kit (16T/18T) | 16T, 18T | Hubs converted from 7–11 speed for road and MTB riders |
| CooMeng | 15T/16T/18T Single Speed Cogs | 15T, 16T, 18T | Dirt jump and BMX-like setups with strong chain retention |
| PeakRider | Single Speed Conversion Kit for Shimano HG | Standard 7–12 speed compatible | Shimano HG freehubs requiring robust base and precision spacer set |
| Bibike | Single Speed Conversion Kit (17T, 10mm/5mm spacers) | Specify 17T with spacer mix | Versatile mounting for mixed-wheel setups and higher-torque riding |
Bibike Single Speed Conversion Kit 13T–22T
This kit provides multiple sprocket sizes from 13T to 22T with spacers and a lock ring for Shimano or Sram HG 8–11 speed bodies. It suits riders seeking a broad gear ratio range on mountain or road bikes. The included spacers enable proper chain line across different setups. Best for riders who want a flexible conversion with readily available spacers for DIY fitting.
Best for: riders who want a wide selection of cog sizes and easy installation on standard HG hubs.
Caution: Verify your hub’s freehub body compatibility before purchase to ensure the spacer stack aligns with your chain width requirements.
CyclingDeal Conversion Kit 18 Teeth
This kit converts a multi-speed hub to a single speed wheel and supports Shimano or Sram 7–11 speed cassette hubs. It includes spacers and a lockring to help achieve a precise chain line. It’s a solid choice for riders who want to preserve their existing chain and achieve a clean single-speed setup without hub replacement.
Best for: riders seeking an all-in-one spacer and sprocket package for a simple hub-to-single-speed transition.
Caution: This kit does not convert a hub into a fixed gear; the hub remains a freewheel type, which matters for some maintenance preferences.
CooMeng 15T/16T/18T Single Speed Cogs
These aluminum single-speed cogs use a narrow-wide tooth profile for reliable chain retention and a heavy-duty 9mm base that distributes stress across the freehub. The one-piece 7075 aluminum flywheel weighs about 66g, offering durability with lighter weight. This kit is ideal for dirt jump and BMX engines that demand secure chain engagement and strong construction.
Best for: riders who need robust retention and a compact, lightweight cog for high-torque riding.
Caution: While strong, aluminum cogs can wear faster than steel under extreme use; monitor chain wear and replace as needed.
CyclingDeal 16 Teeth Conversion Kit
This 16-tooth option, like other CyclingDeal kits, converts a multi-speed hub into a single-speed wheel with compatible spacers and a lockring. The kit emphasizes a good chain line and includes spacers for precise setup. It’s a practical choice for riders who want a mid-range cog size with straightforward installation.
Best for: riders who want a balanced gear ratio and a straightforward installation with a clear chain-line solution.
Caution: The hub remains a freewheel type, not a fixed-gear hub, which matters for certain riding styles and maintenance routines.
Bibike 17T Single Speed Cog Kit
This Bibike kit offers a 17T cog with a set of spacers and a lock ring designed for Shimano or Sram 8–11 speed HG bodies. The included spacers help align chain line on various frame widths. Best for riders who want a mid-size cog with a complete spacer set for a clean, secure single-speed conversion.
Best for: riders wanting a mid-range cog with a full spacer kit for reliable chain tension and alignment.
Caution: Ensure your chain width matches the recommended 1/2″ x 3/32″ to 1/2″ x 11/128″ range to avoid chain-fit issues.
CooMeng 15T/16T/18T Aluminum Single Speed Cogs
This CooMeng kit mirrors a 9mm thick base design with a one-piece 7075 aluminum cog. The texturing emphasizes reliable chain retention and a strong profile for rugged riding. It suits riders who appreciate a lightweight aluminum cog with robust durability for freestyle and dirt-oriented riding.
Best for: riders needing a lightweight, durable cog with strong chain retention for high-torque use.
Caution: Like other aluminum cogs, expect wear over time and inspect teeth for rounding or chipping after heavy riding.
Buying Guide: Key Purchase Considerations
- Hub compatibility: Confirm your freehub body accepts Shimano or Sram HG cassettes and that the kit’s spacers fit your frame width.
- Gear range needs: Choose cog sizes that match your terrain and riding style, from mid-range to broader options for elevated climbs or fast flats.
- Chain compatibility: Ensure the kit supports 1/2″ x 3/32″ to 1/2″ x 11/128″ chains to avoid chain slip or binding.
- Base thickness and construction: Heavier-duty 9mm bases help protect the freehub during hard riding, while lighter aluminum cogs save weight for BMX and dirt jump styles.
- Spacer set completeness: A complete spacer and lock ring set simplifies installation and helps achieve a true chain line.
- Durability vs. wear: Aluminum cogs offer weight savings but may wear faster than steel; factor maintenance into your planning.
Frequently Asked Questions
- What is a single speed conversion kit?
It transforms a multi-speed hub into a single-speed setup by adding a single-speed cog, spacers, and a lock ring compatible with the hub body. - Will these kits work on all bikes?
They are designed for bikes with Shimano or Sram HG-style freehubs and compatible chain widths; always verify hub type and chain size before purchase. - Do these kits convert a hub into a fixed gear?
No. They convert to single speed but keep the hub as a freewheel or fixed configuration depending on the original setup; check your hub type if fixed gear is essential. - What maintenance is required after installation?
Regularly check chain tension, wear on the cog teeth, and ensure spacers remain properly seated to maintain a true chain line. - Are aluminum cogs durable for aggressive riding?
Aluminum cogs provide good durability with lighter weight, but for extreme dirt or BMX tricks, monitor wear and consider wear-resistant options if needed. - Do these kits affect braking or wheel alignment?
When installed correctly with the proper spacers and chain line, there is no brake or wheel alignment impact beyond standard drivetrain alignment.