The right swing arm can improve rear suspension travel, stability, and overall ride feel on dirt bikes from 110cc to 190cc. This guide reviews five popular swing arm options compatible with common Chinese-made dirt bikes and clones, helping you choose a reliable upgrade for tougher terrain, bigger wheels, and sturdier rear frames. Each option below offers different wheel compatibility, axle sizing, and build materials to suit varied riding styles from trail riding to competitive motocross.
| Product | Brand | Key Fit Notes | Wheel Compatibility |
|---|---|---|---|
| TC-Motor Silver 480mm Aluminum Rear Swingarm | TC-Motor Store | Aluminum 480mm, 15mm axle, fits 12″ & 14″ wheels | 12″ Wheel 80/100-12 or 14″ Wheel 90/100-14 |
| Dirt Pit Bike Steel Swing Arm | Unknown (Steel) | CRF style 70-125CC compatibility | 12″ & 14″ tires |
| 21” Extended Swingarm Iron 15mm Bearings | Yier | 14″ to 16″ wheel upgrade, 15mm axle | 125cc-200cc dirt pit bikes |
| Dirt Bike Rear Swing Arm Kit | Yier | 15mm axle, heavy-duty construction | 12″ & 14″ wheels |
| 18” Aluminum Frame Swing Arms Extension | Anime | Universal fit for pit bikes and clones | CRF50 XR50 and similar |
Note: Always verify compatibility with your specific bike model, frame mounting points, and wheel size before purchase. The list focuses on popular options that widely align with common 110cc–190cc dirt bikes and clones.
TC-Motor Silver 480mm Aluminum Rear Swingarm
Fitment includes a 480mm aluminum swingarm designed for 125cc through 190cc pit dirt bikes. This option supports both 12″ wheels (80/100-12) and 14″ wheels (90/100-14) with a 15mm axle requirement. It is compatible with a broad range of Chinese-made dirt bikes such as Stomp Demon X, WPB, Orion, M2R, Lucky MX, Thumpstar, Explorer, Braaap, Atomic, Pitpro, Pitster Pro, DHZ, SSR, Piranha, and more. Always confirm exact model compatibility by checking listed pictures and measurements.
Key considerations: aluminum construction offers weight savings and corrosion resistance, while the 15mm axle ensures secure mounting. If your bike uses a different axle diameter or wheel size, this swingarm may require adapters or additional parts.
Dirt Pit Bike Steel Swing Arm
This steel swing arm is tailored for CRF-style dirt pit bikes manufactured in China, targeting models within 70cc–125cc range. It accommodates 12″ and 14″ tires and is designed for rear disc brake configurations. The robust steel build emphasizes durability under rugged riding while maintaining straightforward installation for compatible bikes. Check your bike’s mounting points and brake type to ensure seamless fitment.
21″ Extended Swingarm Iron With Bearings
Designed for 125cc–200cc dirt pit bikes, this 21″ extended swingarm supports a wheel upgrade path from 14″ to 16″ rear wheels. The package includes one swing arm and two pieces of 6200 bearings with a 10mm thread. The 15mm axle specification aids secure mounting and improved rear-end stability, making it a strong option for riders seeking more wheel options and enhanced rear traction on rough terrain.
Dirt Bike Rear Swing Arm Kit
Yier’s heavy-duty rear swing arm kit emphasizes durability for off-road use, with compatibility for 12″ and 14″ wheels across 70cc–160cc dirt pit bikes and clones from brands such as SSR, Apollo, Taotao, Coolster, and SDG. A 15mm axle improves mounting security, aiding shock absorption and ride stability. This option emphasizes a robust build for aggressive riding or competition conditions while maintaining straightforward installation for many popular models.
18” Aluminum Frame Swing Arms Extension
This Anime swing arm extension targets universal compatibility for pit bikes and clones, including CRF50 XR50 and similar small-bore models. While not limited to a specific wheel size, aluminum construction helps reduce weight while offering reliable strength for extended rear suspension action. It is a practical upgrade for riders seeking a lighter alternative that still delivers improved rear-end behavior on varied terrains.
Buying Guide: Key Purchase Considerations For Swing Arm Upgrades
- Wheel compatibility: Confirm whether the swing arm supports your current wheel size or if an upgrade is planned (12″, 14″, 16″). Some models specify the need for a specific axle size, such as 15mm.
- Material and durability: Aluminum swing arms tend to be lighter and resistant to corrosion, while steel options may offer greater raw strength. Choose based on riding style and maintenance preferences.
- Fitment and model range: Check listed fitments to ensure compatibility with your bike’s engine displacement and frame design. Some swing arms target CRF-style bikes or a wide array of Chinese-made pit bikes.
- Axle and mounting hardware: Ensure the kit includes or is compatible with the required axle diameter and mounting hardware. A secure connection improves handling and safety on rough terrain.
- Suspension integration: Consider how the new swing arm interacts with rear shocks, linkage, and overall suspension travel. Upgrades with a longer arm may alter geometry and require additional adjustments.
- Installation effort: Some swing arms are direct replacements; others may require substantial modifications, alignment checks, or additional parts like bearings and spacers.
- Maintenance: Aluminum may require regular cleaning to prevent corrosion in salt or muddy environments; steel may need rust protection in damp climates.
- Warranty and supplier support: Choose sellers with return policies or warranties, especially for aftermarket components with compatibility caveats.
Overall, selecting the right swing arm involves balancing wheel size goals, frame compatibility, material strength, and installation feasibility. For riders who plan larger wheel upgrades or seek improved stability on challenging terrain, the options above provide diverse approaches to upgrading the rear suspension geometry and ride quality.