Answer: If you’re upgrading rear suspension for dirt pit bikes, an extended or heavy-duty swingarm improves stability, wheelbase, and handling on rough terrain. This guide features five well-suited options for 12″ to 16″ wheels and various pit bike engines. Ideal buyers include trail riders seeking extra stability, racers needing better control, and builders customizing 70cc–300cc machines.
Quick reference table of selected products
| Product | Wheel Fit | Best For | Notes |
|---|---|---|---|
| YC Yier 21″ Extended Swingarm | 14″ to 16″ | Upgrading to larger rear wheels | Includes bearings |
| Kemblawolf 12″ Heavy-Duty Swing Arm | 12″ | Wide model compatibility | 12mm axle, 440mm length |
| 91.SCS Aluminum Rear Swingarm | 16″ / 18″ | Extended stability | Heavy aluminum construction |
| TC-Motor 480mm Aluminum Swingarm | 12″ / 14″ | Chinese pit bikes | Requires compatible axle |
| ICONSPORTSS Dirt Pit Bike Swing Arm & Shock Kit | 12″ wheels | Complete upgrade kit | 260mm shock included |
YC Yier 21″ Extended Swingarm Iron 15mm Bearings
This extended swingarm is designed to upgrade pit bikes from 14″ to 16″ rear wheels. It includes 15mm bearings and a 21″ length, enhancing wheelbase stability for better straight-line tracking on rough trails. Best for riders upgrading to bigger rear wheels on 125cc–200cc machines.
Who it’s best for: Riders seeking a simple wheel-size upgrade with a corresponding stability boost. It suits bikes commonly used in casual dirt runs or local club events.
Caution: Ensure the model fits your specific monster like SSR, Apollo, or Taotao variants with 14″ to 16″ rear wheels.
Kemblawolf Heavy-Duty Rear Swing Arm
Built for 12-inch wheels, this swing arm supports 70cc–150cc dirt pit bikes, including SSR, Apollo, and Taotao. It features a sturdy 12mm axle and a 440mm overall length for reliable rear-end alignment and improved ride quality on rough surfaces.
Who it’s best for: Riders with 12″ wheel setups who want a robust, long-lasting rear arm that improves stability on uneven tracks.
Limitation: Designed specifically for 12″ wheels; compatibility may vary with non-standard axles or mounts.
91.SCS Heavy Duty Aluminum Swingarm
This rear swingarm uses high-strength aluminum to deliver rigidity and durability. It measures 590mm in overall length for a longer wheelbase, plus a reverse shock mount bracket to optimize suspension geometry on rough trails.
Who it’s best for: Riders seeking a premium aluminum upgrade with improved shock geometry for aggressive off-road riding.
Limitation: Aluminum construction can be more prone to cosmetic wear vs. steel in extreme impact scenarios, though strength remains high.
TC-Motor Aluminum Swingarm
Designed for 125cc–190cc pit bikes, this 480mm aluminum swingarm fits 12″ or 14″ wheels with a 15mm axle requirement. It lists compatibility with numerous Chinese-made dirt bikes, making it a versatile option for builders with mixed fleets.
Who it’s best for: Builders and riders with multiple Chinese pit bike models who want a common upgrade path across several machines.
Limitation: Verify axle compatibility and wheel size before purchase to avoid fit issues on specialized models.
ICONSPORTSS Swing Arm And Shock Kit
This kit pairs a dirt pit bike rear swing arm with a heavy-duty 260mm shock for comprehensive suspension replacement. It covers a wide range of 70cc–160cc bikes with 12″ rear wheels and includes mounting hardware for SSR, Apollo, Taotao, and Coolster models.
Who it’s best for: Riders seeking a complete upgrade solution with a matching rear shock for enhanced ride stability on rough terrain.
Caution: Compatibility hinges on wheel size and model; confirm that your bike uses a 12″ rear wheel and 260mm shock pairing.
Buying Guide: How To Choose The Right Swing Arm
What wheel size does your bike use? Most pit bikes run 12″, 14″, or 16″ rear wheels. Pick a swingarm that matches your current or intended wheel size to avoid mounting issues.
Is the axle diameter compatible? Many arms require 12mm axles. Confirm axle hole size and the axle type on your bike before purchasing.
Material matters. Steel swingarms offer durability, while aluminum arms provide lighter weight and corrosion resistance. Consider riding style and expected impact when choosing material.
Length and wheelbase. Longer arms increase wheelbase, improving straight-line stability but may affect turning radius. Choose length based on terrain and riding preference.
Shock integration. Some kits include shocks; others do not. If buying separately, ensure mounting points and travel align with your suspension setup.
Model compatibility. Brands like SSR, Apollo, Taotao, Coolster, and Honda CRF-based styles appear frequently. Check model compatibility charts and pictures in the listing.
FAQ
- What is the main benefit of a longer swingarm? It increases wheelbase for better stability on rough terrain and at higher speeds.
- Do all swingarms fit 12″ wheels? No. Some models are designed for 14″ or 16″ wheels; verify wheel size before buying.
- Can I mix a swingarm with any shock? Not always. Check mounting points, length, and travel to ensure compatibility with your shock.
- Are aluminum swingarms lighter than steel? Yes, typically lighter, which can improve handling but may affect durability in severe impacts.
- Is a complete kit better than a single arm? A kit with a matching shock can simplify installation and ensure geometry compatibility.