Selecting the right swing arm can improve stability, handling, and wheel compatibility for 14″ or 16″ rear wheels on dirt pit bikes. This guide compares five popular options designed for 125cc to 200cc engines, including upgrades from 14″ to 16″ rear wheels. Each product is evaluated on construction, fitment, and ease of installation to help riders choose a robust, reliable upgrade for demanding terrain.
| Product | Brand | Wheel Size Support | Material | Notable Features |
|---|---|---|---|---|
| YC Yier 21” Extended Swingarm | YC Yier | 14″ to 16″ | Iron | 15mm bearings, 6200 bearings included |
| ICONSPORTSS Heavy Duty Swing Arm | ICONSPORTSS | 14″ to 16″ | Iron | 550mm length, 15mm axle, versatile fit |
| Suisuitong Rear Swing Arm | SUISUITONG | 14″ to 16″ | Iron | Durable, 10mm thread, 6201 bearings |
| CWTD 450mm Rear Swing Arm | CWTD | 12″ wheels; compatible with 70cc-125cc | Iron | Brand new, 12″ wheel compatibility |
| TC-Motor Rear Swing Arm | TC-Motor | 12″ wheel options; fits many 80/100-12 or 14″ | Steel | Comprehensive compatibility for various Chinese bikes |
Note: The table above highlights key specs to help compare compatibility and build quality. Always verify fitment with your specific bike model and wheel size before purchasing.
YC Yier 21” Extended Swingarm Review
The YC Yier swingarm is designed for 125cc-200cc dirt pit bikes with 14″ rear wheels upgraded to 16″ rear wheels. The package includes a single swing arm and a 15mm thread with two pieces of 6200 bearings, supporting a straightforward upgrade for riders seeking extended rear travel. Its iron construction aims to balance strength and weight, suitable for varied trail conditions. When considering the 21″ length, ensure frame clearance and chain alignment are appropriate for your bike setup.
WPHMOTO 14” Rear Swing Arm Review
The WPHMOTO swing arm is a brand-new component intended for 125cc-160cc dirt pit bikes with 14″ rear wheels. The kit includes one swing arm and is positioned as a direct upgrade path for riders seeking improved stability and durability. Its simple design focuses on compatibility with a range of common 14″ rear-wheel configurations, making it a practical option for riders updating suspension geometry without changing other components.
91.SCS 490mm Swing Arm Review
The 91.SCS 490mm swing arm is a universal option for 110cc-125cc-140cc pit bikes. The product notes advise buyers to verify fitment prior to purchase due to variations in bike geometry. This swing arm focuses on providing a balance between length and compatibility, with a caution to ensure proper shape and measurement against the bike’s frame and mounting points.
ICONSPORTSS Heavy Duty Swing Arm Review
ICONSPORTSS offers a heavy-duty iron swing arm with a 550mm length and 15mm axle, designed to fit 125cc, 150cc, 160cc, and 200cc dirt pit bikes. It explicitly supports upgrading from 14″ to 16″ rear wheels, expanding tire and gearing options. The construction emphasizes durability for rough terrain and frequent use, making it a robust upgrade for riders seeking longer travel and stronger mounting integrity.
Suisuitong 21” Extended Swing Arm Review
The Suisuitong rear swing arm is a 21″ extended option with a 14″ to 16″ wheel upgrade capability. Built from high-strength silver iron, it aims to provide stability and ease of installation with a 10mm thread and 6201 bearings. It is designed to fit a range of 125cc-200cc dirt pit bikes and emphasizes reinforced structure for enhanced ride control across varied terrains.
CWTD 450mm Rear Swing Arm Review
CWTD’s 450mm rear swing arm targets 70cc-125cc dirt pit bikes with 12″ rear wheels. It is presented as a brand-new component with straightforward installation. Its compatibility is labeled for smaller-displacement bikes, making it a practical choice for riders with compact frames who want reliable arm strength and predictable handling with 12″ wheels.
TC-Motor Black Steel Rear Swing Arm Review
TC-Motor’s steel rear swing arm supports a broad range of 125cc-190cc pit dirt bikes, providing mounting for 12″ and certain 14″ wheels (with compatible axles). The description notes the need for a 15mm wheel axle in some configurations, making it a versatile option for riders who work with a variety of Chinese-made pit bikes, including popular models like SSR, Apollo, Taotao, and others.
Buying Guide: Key Considerations for Pit Bike Swing Arms
- Wheel compatibility: Verify whether the arm supports your rear wheel size (12″, 14″, or 16″) and whether it enables a swap from 14″ to 16″ without additional parts.
- Engine compatibility: Confirm the engine displacement range (e.g., 70cc–200cc) to ensure the swing arm aligns with your bike’s frame geometry and chainline.
- Axle and bearing specifications: Check axle diameter (commonly 12mm or 15mm) and bearing types (6200, 6201, etc.) to ensure proper fitment and longevity.
- Material and durability: Iron or steel swing arms offer strength for off-road use; consider weight and anticipated riding conditions when choosing.
- Installation ease: Look for arms with clear mounting points and a straightforward installation process; some kits include bearings and threads for quicker setup.
- Fitment notes: Some listings require special attention to shape, size, or frame clearance. Always compare the arm’s length and mounting pattern against your bike model.
- Warranty and support: If available, consider seller support and return policies, especially for universal swing arms that claim broad compatibility.
When selecting a pit bike swing arm, prioritize compatibility with your wheel size and frame geometry, while weighing durability against install effort. For riders upgrading to larger rear wheels, a longer arm and reinforced construction can improve stability, traction, and suspension leverage on rough terrain. Always double-check measurements and consult your bike’s service manual or a qualified technician if you are unsure about fitment.