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Choosing the right pit bike swing arm can widen rear-wheel options, improve stability, and enhance ride control on rough terrain. This guide highlights five top swing arms that fit common 14″ and 16″ rear wheels on 110cc–200cc dirt bikes from brands like SSR, Apollo, Taotao, Coolster, and more. Each option emphasizes durability, straightforward installation, and reliable bearings. Use the summary table below to compare core specs at a glance, then read detailed product sections to evaluate fit, mounting hardware, and upgrade potential.

Summary Of Selected Swing Arms

YC Yier 21-Inch Extended Swing Arm

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The YC Yier 21-Inch Extended Swing Arm is designed for riders seeking an upgrade path from 14″ to 16″ rear wheels on mid-size dirt bikes. It targets engines in the 125cc–200cc range, making it suitable for popular platforms that run Coolster, SSR, Apollo, Taotao, and similar chassis. The kit includes one swing arm and relies on a 10mm thread with two 6200 bearings, providing a stable pivot with reduced play for smoother handling on rough trails. The extended length enhances wheelbase for improved straight-line stability at speed.

Key characteristics include compatibility with both 14″ and 16″ rear wheels, solid iron construction, and a straightforward installation path for riders upgrading their wheel size. The 21″ extension aligns with common frame geometries used on many 125cc–200cc pit bikes, helping to preserve rake and trail consistency after the upgrade. As with any major swing-arm change, verify frame clearance, chain alignment, and brake line routing before installation to prevent interference during riding.

Reference features: fits 125cc–200cc engines, supports 14″ to 16″ rear wheels, includes 1x swing arm, 10mm thread, two 6200 bearings. Plan for proper torque specs and check for any frame contact after mounting. This arm aims to offer a robust upgrade path for riders chasing more wheel compatibility and steadier handling on rugged trails.

WPHMOTO 14-Inch Rear Swing Arm

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The WPHMOTO 14-Inch Rear Swing Arm is a practical replacement for riders who run 14″ rear wheels on 125cc–160cc dirt pit bikes. It’s described as brand new and ships as a single swing arm (1x). This arm is designed to fit 125cc–160cc dirt pit bikes with 14″ rear wheels, enabling a straightforward upgrade when upgrading from stock components. While the listing highlights a fresh, factory-new condition, buyers should confirm fit with their specific model and any existing hardware before purchase to avoid compatibility gaps.

In terms of installation, the unit is presented as a direct replacement option, minimizing guesswork for riders who want a quick upgrade path. Compatibility with SSR, Apollo, Taotao, and other brands in the 125cc–160cc class makes it a versatile option for riders who run mixed-brand setups. Expect a standard swing arm length designed to maintain correct chain alignment and suspension geometry when paired with compatible rear wheels.

Reference features: brand-new condition, includes 1x swing arm, fits 125cc–160cc dirt pit bikes with 14″ rear wheels. Ensure proper torque, check alignment, and verify that mounting points align with your frame for a reliable upgrade.

ICONSPORTSS Heavy Duty Swing Arm

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The ICONSPORTSS Heavy Duty Swing Arm is built for riders who demand strength and versatility. With a 550mm length and a 15mm axle, this arm is designed to fit 125cc, 150cc, 160cc, and 200cc dirt pit bikes, and works with both 14″ and 16″ rear wheels. The construction emphasizes durability, offering reliable performance on rugged trails. The design targets riders who want a robust upgrade that preserves alignment while accommodating wheel-size upgrades from 14″ to 16″.

Key features include durable iron construction for longevity, a precise fit for 125cc–200cc platforms, and upgrade compatibility from 14″ to 16″ rear wheels. The arm’s length and axle size are chosen to balance stability and weight, supporting improved ride control on uneven terrain. Installation complexity is typical for aftermarket swing arms, with standard mounting points and hardware compatibility. Consider the overall weight impact and ensure chain alignment remains optimal after installation.

• Durable Iron Construction
• Fits 125cc–200cc Dirt Pit Bikes
• Supports 14″ to 16″ Wheel Upgrades

Suisuitong 21-Inch Extended Swing Arm

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The Suisuitong 21-Inch Extended Swing Arm is designed for riders upgrading from 14″ to 16″ rear wheels on 125cc–200cc dirt bikes. This heavy-duty swing arm is constructed from durable iron and includes a guard for added protection. It emphasizes a reinforced structure for stability and performance in demanding off-road conditions. The kit specifies a 10mm thread and 6201 bearings, making installation straightforward and secure for a reliable upgrade that improves wheelbase and ride control on rugged terrain.

Key benefits include an extended 21″ length to accommodate longer wheelbases, compatibility with both 14″ and 16″ rear wheels, and a focus on durability to withstand rough trails. The included guard helps protect the swing arm and chain area during aggressive riding. Users should verify their frame geometry and ensure the mounting points align with existing hardware. Proper installation ensures smooth operation and reduces the risk of interference with the brake system or chain tension.

Reference features: durable iron rear swing arm, 21″ extension, fits 14″ and 16″ wheels, reinforced structure, 10mm thread, 6201 bearings.

TC-Motor Black Steel Rear Swingarm

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The TC-Motor Black Steel Rear Swingarm is a versatile option for 125cc–160cc pit dirt bikes with 12″ wheels and 80/100-12 or 14″ wheels (90/100-14). The swingarm is described as brand new, with 12″ wheel compatibility and mounting hardware to suit a wide range of Chinese-made pit bikes. The design emphasizes straightforward installation and ease of maintenance, making it appealing for riders who want a reliable, economical upgrade to their stock setup.

Key features include broad compatibility with popular 12″ wheel variants and several engine classes, including 70cc–190cc. It requires awareness of your brake and chain alignment after mounting. Installers should confirm the engine compatibility and wheel size, as this swing arm targets many 12″ configurations used by SSR, Apollo, Taotao, and similar brands. Expect standard mounting points, with potential adjustments needed for proper alignment and clearance.

Kemblawolf Heavy-Duty Rear Swing Arm

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The Kemblawolf Heavy-Duty Rear Swing Arm is designed for 12-inch wheels and fits a broad range of dirt pit bikes from 70cc up to 150cc, including SSR, Apollo, and Taotao models. The arm uses a 12mm axle and measures about 440mm in length, offering a sturdy upgrade path for riders seeking improved stability and suspension leverage on compact frames. The build emphasizes reliability under off-road use and compatibility with common 12″ wheel setups, making it a strong option for riders who prioritize durability and wide compatibility.

Considerations include confirming 12″ wheel compatibility with your specific bike, ensuring proper chain alignment after installation, and checking that the 12mm axle matches your existing hardware. The 440mm length provides a balance between weight and stiffness, suitable for 70cc–150cc platforms. As with any swing arm upgrade, verify frame clearance, brake line routing, and potential clearance with exhaust components before completing installation.

Reference features: fits 12″ wheels (80/100-12), 12mm axle, 440mm length, compatible with SSR, Apollo, Taotao, 12″ rear wheel upgrades.

Buying Guide

When selecting a pit bike swing arm, focus on wheel compatibility, engine class, and mounting geometry. A swing arm that fits 14″ and 16″ rear wheels gives you flexibility to upgrade wheel size without swapping other major components. Check the axle bore size (commonly 12mm or 15mm) and bearing type (such as 6200 or 6201) to ensure the new arm uses compatible hardware and spacers with your wheel hub and swing arm bearing housings.

Durability and material also matter. Iron or steel swing arms typically offer strength for aggressive off-road riding, but weight and construction quality influence handling. Longer arms (like 21″ extended models) increase wheelbase and straight-line stability but can alter steering response; shorter arms preserve nimbleness but may limit wheel upgrade options. Installation ease varies by model; some kits include all necessary mounting bolts, guards, and bearings, while others assume you already have compatible hardware.

To compare options quickly, consider these criteria side-by-side: wheel compatibility (12″, 14″, 16″), arm length (440mm, 550mm, 21″), axle size (12mm vs 15mm), bearing type (6200 vs 6201), and whether the package includes mounting hardware or guards. For riders chasing performance upgrades, an arm offering a clear path from 14″ to 16″ wheels with a strong construction and reliable bearings tends to deliver the best value over stock replacements.