Pit bike enthusiasts seek durable, reliable extended swing arms to improve ground clearance, stability, and handling. This guide highlights five selected extended swing arms suitable for various pit bike setups, from 125cc to 200cc class machines. Each option offers different wheel sizes and mounting considerations, letting you tailor your ride to your terrain and riding style. The selections below balance construction quality with practical compatibility, helping you choose an upgrade that aligns with your existing equipment and performance goals.
Summary of Selected Products
| Product | Wheel Compatibility | Notable Features | Brand |
|---|---|---|---|
| 21” Extended Swingarm Iron 15mm Bearings | 14″ to 16″ rear wheels | Includes 1 swing arm, 10mm thread, two 6200 bearings | Yier |
| 17″ Aluminum Extended Swingarm (Disc Brake) | Various 125cc pit bikes | Triangular shape; aluminum construction; extends pedal geometry | Unknown |
| Rear Swing Arm 21” Extended Swingarm | 14″ and 16″ wheels | 18″ length; sleek silver finish; iron build | SUISUITONG Store |
| TC-Motor Silver 480mm Aluminum Swingarm | 125cc–190cc pit bikes; 12″ and 14″ wheels | Requires 15mm axle; broad compatibility with many brands | TC-Motor Store |
| 18-Inch Extended Aluminum Swingarm | CRF50 XR50 and similar | Universal fit; flat swingarm design | Anime |
21” Extended Swingarm With 15mm Bearings For Pit Dirt Bikes
The Yier 21” extended swingarm is designed to support 14″ to 16″ rear wheels, making it a versatile upgrade for riders looking to improve rear-end stability and traction. The package includes one swing arm and bearings, with a 10mm thread compatible with two 6200 bearings. This setup is suitable for 125cc to 200cc dirt pit bikes, including popular clones. Consider this option if your bike currently uses smaller rear wheels and you want a straightforward transition to larger wheels for smoothing out rough surfaces.
Key considerations
- Compatibility: Primarily targets 125cc–200cc dirt pit bikes upgrading from 14″ to 16″ rear wheels.
- Bearings: Includes 6200 bearings, which are widely used in ATV and dirt bike applications, easing maintenance and replacement.
- Fit and clearance: Ensure the additional length aligns with frame geometry to avoid chain or brake interference.
Replacement 17-Inch Aluminum Extended Swingarm With Disc Brake
This aluminum extended swingarm is crafted for dirt bikes with disc brakes, compatible with Honda CRF50 XR50 SDG SSR 107–125cc pit bikes and their clones. The triangular design adds structural rigidity, helping to improve steering response and rear-end stability on bumpy surfaces. If you ride a small-displacement pit bike and want to modernize the profile with a stronger aluminum arm, this option provides a balanced blend of light weight and durability.
Key considerations
- Shape and geometry: Triangular design can influence weight distribution and flex characteristics.
- Disc brake compatibility: Ensures braking performance is maintained with the extended arm.
- Installation scope: Tailored for specific models—verify mounting points match your bike.
Rear Swing Arm 21” Extended For 14″ & 16″ Wheels
The SUISUITONG 21″ extended rear swing arm offers compatibility with both 14″ and 16″ wheels, providing a robust platform for bigger rear wheel setups. The finish is a sleek silver, and the arm is built from durable iron for long-lasting performance. This option suits riders seeking a straightforward upgrade path for heavier-duty trail riding or competitive pit bike events, where additional ground clearance and stability can translate to improved lap times and control on uneven terrain.
Key considerations
- Material: Iron construction emphasizes strength, potentially at the expense of some weight compared to aluminum.
- Finish: Silver coloration offers a protective aesthetic and corrosion resistance on exposure to moisture and dirt.
- Geometry: Check overall length and width to ensure compatible wheel clearance and chain alignment.
TC-Motor 480mm Aluminum Swingarm For Pit Dirt Bikes
The TC-Motor 480mm aluminum rear swingarm is designed for 125cc–190cc pit dirt bikes, compatible with 12″ and 14″ wheel configurations. This model requires a 15mm axle to match, and it is advertised as fitting a broad range of Chinese-made pit bikes and clones, such as Stomp Demon X and SSR variants. When considering this arm, confirm the axle diameter, wheel size, and chain alignment to ensure proper fitment with your bike’s drivetrain and braking setup.
Key considerations
- Axle diameter: A 15mm axle match is essential for correct installation.
- Brand compatibility: Lists a wide array of common pit bike brands—verify model-specific fitment.
- Overall length: 480mm impacts wheel alignment and chain tension, so plan accordingly.
18-Inch Extended Aluminum Swingarm For Dirt Bikes
The 18-inch extended aluminum swingarm from Anime caters to universal fitment needs, particularly for CRF50 XR50, XR 50 variants, and similar small-displacement dirt bikes. The flat swingarm design emphasizes simplicity and weight reduction while still delivering extended reach for enhanced stability. This option is attractive for riders who want an easier installation with a broad compatibility net, ensuring the lift and feedback stay predictable during aggressive riding or off-road traversal.
Key considerations
- Fitment versatility: Marketed as universal, but confirm exact model compatibility with your bike’s frame and mounting points.
- Design approach: Flat swingarm emphasizes lightweight handling and straightforward installation.
- Durability: Aluminum construction provides resistance to corrosion and fatigue under typical pit bike use.
Buying Guide: Choosing The Right Extended Swing Arm For A Pit Bike
When evaluating extended swing arms for pit bikes, consider four core dimensions: wheel size compatibility, frame geometry, axle and mounting requirements, and overall durability. Different extensions affect ground clearance, chain alignment, and suspension dynamics, so matching your riding style and terrain is essential.
Wheel compatibility and aim
- Assess the wheel sizes you currently use and plan to use after upgrading. Some arms are optimized for 14″ to 16″ rear wheels, while others support broader options. Proper compatibility ensures consistent braking and steering behavior.
- Consider how the longer arm shifts weight distribution. A longer arm can improve stability on rough terrain but may demand adjustments to suspension setup and steering geometry.
Material and build quality
- Aluminum arms tend to offer lighter weight and corrosion resistance, aiding agility and ease of maintenance. Iron or steel arms tend to be more robust for heavy-duty use but add weight.
- Check for proper heat treatment, weld quality, and bearing support. High-quality bearings minimize vibration and wear, extending life and reducing performance drift.
Compatibility and installation notes
- Measure axle diameters (e.g., 15mm) and ensure alignment with your bike’s brake system and chain tensioner. Mismatches can create drivetrain binding or braking interference.
- Confirm mounting points, frame clearance, and potential need for longer chain or different sprockets. Some arms require additional components or adapters.
Riding goals and terrain
- For flat-surface riding or smooth tracks, a modest extension may offer better stability without large theoretical changes to handling. For rocky or uneven terrain, longer arms can improve control but demand tuned suspension and careful alignment.
- Competition use may demand precise geometry and consistent tolerances; evaluate manufacturer specifications and user reviews for reliability.
Maintenance and longevity
- Regular inspection of mounting bolts, bearings, and pivot points helps prevent play and misalignment. Replacing bearings as needed maintains smooth operation and reduces risk of mechanical failure during rides.
- Inspect finishes for corrosion, especially in damp environments. Protective coatings can extend life in dusty or wet conditions common to pit bike riding.