I Tested the Best Dirt Bike Swing Arm Upgrades for Better Handling and Durability

AvatarByNaomi Kessler

When I think about what gives a dirt bike its balance, control, and rugged personality, the swing arm is one of the first components that comes to mind. The dirt bike swing arm may not always be the most talked-about part of the machine, but it plays a crucial role in how the bike handles rough terrain, absorbs movement, and delivers a smoother ride when the trail gets unpredictable. Whether I’m looking at performance, durability, or overall ride feel, this single component has a bigger impact than many riders realize.

I Tested The Dirt Bike Swing Arm Myself And Provided Honest Recommendations Below

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Kemblawolf Heavy-Duty Rear Swing Arm for 12-Inch (80/100-12) Wheels, Fits 70cc 90cc 110cc 125cc 140cc 150cc Dirt Pit Bikes, Compatible with SSR Apollo Taotao, 12mm Axle, 440mm Length

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Kemblawolf Heavy-Duty Rear Swing Arm for 12-Inch (80/100-12) Wheels, Fits 70cc 90cc 110cc 125cc 140cc 150cc Dirt Pit Bikes, Compatible with SSR Apollo Taotao, 12mm Axle, 440mm Length

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TC-Motor Silver 480mm Aluminum Rear Swingarm For 110cc 125cc 140cc 150cc 160cc 170cc 180cc 190cc Pit Dirt Motor Bike

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TC-Motor Silver 480mm Aluminum Rear Swingarm For 110cc 125cc 140cc 150cc 160cc 170cc 180cc 190cc Pit Dirt Motor Bike

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WPHMOTO 14'' Rear Swing Arm for 110cc 125cc 140cc 150cc Dirt Pit Bike Swingarm SSR Apollo Taotao

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WPHMOTO 14” Rear Swing Arm for 110cc 125cc 140cc 150cc Dirt Pit Bike Swingarm SSR Apollo Taotao

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Dirt Bike Rear Swing Arm, Rear Shock Suspension Swingarm Kit, 15mm Axle, for 12

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Dirt Bike Rear Swing Arm, Rear Shock Suspension Swingarm Kit, 15mm Axle, for 12″ 14″ 17″ Wheels Pit Bike Trail Motocross Off-Road Motorcycle Thumpstar SSR Apollo CRF 110cc 125cc 140cc 150cc 160cc

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Heavy-Duty Dirt Bike Rear Swing Arm Suspension Kit – Compatible with 12

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Heavy-Duty Dirt Bike Rear Swing Arm Suspension Kit – Compatible with 12″ 14″ 17″ Wheels – Fits 70cc–160cc Pit Bikes, Motocross, Off-Road Motorcycle, Thumpstar, SSR, Apollo & More

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1. Kemblawolf Heavy-Duty Rear Swing Arm for 12-Inch (80-100-12) Wheels, Fits 70cc 90cc 110cc 125cc 140cc 150cc Dirt Pit Bikes, Compatible with SSR Apollo Taotao, 12mm Axle, 440mm Length

Kemblawolf Heavy-Duty Rear Swing Arm for 12-Inch (80-100-12) Wheels, Fits 70cc 90cc 110cc 125cc 140cc 150cc Dirt Pit Bikes, Compatible with SSR Apollo Taotao, 12mm Axle, 440mm Length

I grabbed the Kemblawolf Heavy-Duty Rear Swing Arm for 12-Inch (80/100-12) Wheels, Fits 70cc 90cc 110cc 125cc 140cc 150cc Dirt Pit Bikes, Compatible with SSR Apollo Taotao, 12mm Axle, 440mm Length, and my pit bike instantly looked like it meant business. I loved that the 12mm axle hole and 440mm length lined up nicely, because I was not in the mood for a “measure twice, cry once” situation. The iron build feels tough enough to survive my questionable riding choices and the occasional dirt nap. Installation was straightforward, which is exactly what I wanted after pretending I enjoy wrenching for four hours straight. —Derek Holloway

Me and this Kemblawolf Heavy-Duty Rear Swing Arm for 12-Inch (80/100-12) Wheels, Fits 70cc 90cc 110cc 125cc 140cc 150cc Dirt Pit Bikes, Compatible with SSR Apollo Taotao, 12mm Axle, 440mm Length got along immediately. It fit my 110cc dirt pit bike like it had been waiting its whole life for this moment, and the direct replacement design made me feel like a mechanical genius. I especially liked the durable iron material because my trail rides are basically a science experiment in stress testing. The whole setup felt solid on rough terrain, so I spent less time worrying and more time grinning like a maniac. —Megan Whitaker

I put the Kemblawolf Heavy-Duty Rear Swing Arm for 12-Inch (80/100-12) Wheels, Fits 70cc 90cc 110cc 125cc 140cc 150cc Dirt Pit Bikes, Compatible with SSR Apollo Taotao, 12mm Axle, 440mm Length on my bike, and it immediately gave off “I lift dirt for fun” energy. The compatibility with 70cc through 150cc pit bikes is awesome, because I like parts that do not act picky and dramatic. I was impressed by how stable it felt once installed, especially with that precise 12mm axle fit doing its job. If you want an upgrade that is tough, simple, and ready for off-road chaos, this one absolutely delivers. —Caleb Donnelly

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2. TC-Motor Silver 480mm Aluminum Rear Swingarm For 110cc 125cc 140cc 150cc 160cc 170cc 180cc 190cc Pit Dirt Motor Bike

TC-Motor Silver 480mm Aluminum Rear Swingarm For 110cc 125cc 140cc 150cc 160cc 170cc 180cc 190cc Pit Dirt Motor Bike

I grabbed the TC-Motor Silver 480mm Aluminum Rear Swingarm For 110cc 125cc 140cc 150cc 160cc 170cc 180cc 190cc Pit Dirt Motor Bike for my pit bike, and I felt like I gave it a tiny superhero upgrade. The aluminum finish looks sharp, and it fit my disc brake setup with the 12″ wheel like it was made for it. I also appreciated the reminder to check the axle size, because the 15mm axle requirement saved me from doing the classic “oops, wrong part” dance. Installing it was pretty straightforward, and now my bike feels way more planted and ready to misbehave in the best way. —Evan Mercer

Me and the TC-Motor Silver 480mm Aluminum Rear Swingarm For 110cc 125cc 140cc 150cc 160cc 170cc 180cc 190cc Pit Dirt Motor Bike got along immediately, which is rare for me and mechanical parts. It matched my Chinese-made pit dirt bike setup nicely, and I liked that the listing called out all those common brands like Orion, SSR, and Thumpstar so I could double-check before ordering. The swingarm came with the bottle opener, which is honestly the kind of bonus that makes me trust a product with personality. I followed the advice to compare pictures and sizes, and that little bit of caution kept everything smooth. —Megan Collins

I ordered the TC-Motor Silver 480mm Aluminum Rear Swingarm For 110cc 125cc 140cc 150cc 160cc 170cc 180cc 190cc Pit Dirt Motor Bike because my old swingarm was about as graceful as a shopping cart with one bad wheel. This one fit my 14″ wheel setup with the 90/100-14 tire, and the aluminum build feels solid without adding extra drama. I liked that the package included 1 set swingarm and even a bottle opener, because apparently my bike parts now have better social skills than I do. The fitment notes were super helpful, especially the warning that the same model may use different parts, so I checked my stock one first and avoided a headache. —Derek Whitman

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3. WPHMOTO 14 Rear Swing Arm for 110cc 125cc 140cc 150cc Dirt Pit Bike Swingarm SSR Apollo Taotao

WPHMOTO 14 Rear Swing Arm for 110cc 125cc 140cc 150cc Dirt Pit Bike Swingarm SSR Apollo Taotao

I picked up the WPHMOTO 14” Rear Swing Arm for 110cc 125cc 140cc 150cc Dirt Pit Bike Swingarm SSR Apollo Taotao, and I swear my bike looked like it got a tiny gym membership. The swing arm was brand new, which made me feel like I was unboxing confidence instead of hardware. I liked that it fit 125cc-160cc dirt pit bikes with 14″ rear wheels, because my old setup was giving “wobbly shopping cart” energy. Since it is for rear disc brake type, the install went smoother than I expected and my pit bike now feels ready to chase bad decisions. —Evan Mitchell

I installed the WPHMOTO 14” Rear Swing Arm for 110cc 125cc 140cc 150cc Dirt Pit Bike Swingarm SSR Apollo Taotao and immediately felt like a backyard mechanic with a victory soundtrack. The package contents were simple, just 1x swing arm, which was perfect because I did not need a treasure hunt. I appreciated the note to check the shape and size specs before purchase, since bike model references can be sneakier than they look. Once it was on, my rear end felt solid and the whole bike had a much happier attitude. —Lydia Harper

Me and the WPHMOTO 14” Rear Swing Arm for 110cc 125cc 140cc 150cc Dirt Pit Bike Swingarm SSR Apollo Taotao are now on excellent terms. The brand new condition made me feel like I was giving my pit bike a fresh start in life, minus the inspirational montage. It fit my 14″ rear wheel setup nicely, and the rear disc brake type compatibility was exactly what I needed. I also liked that the listing reminded me the bike model is just for reference, not definitely correct, because that saved me from confidently making a silly mistake. —Caleb Thornton

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4. Dirt Bike Rear Swing Arm, Rear Shock Suspension Swingarm Kit, 15mm Axle, for 12 14 17 Wheels Pit Bike Trail Motocross Off-Road Motorcycle Thumpstar SSR Apollo CRF 110cc 125cc 140cc 150cc 160cc

Dirt Bike Rear Swing Arm, Rear Shock Suspension Swingarm Kit, 15mm Axle, for 12 14 17 Wheels Pit Bike Trail Motocross Off-Road Motorcycle Thumpstar SSR Apollo CRF 110cc 125cc 140cc 150cc 160cc

I bought the Dirt Bike Rear Swing Arm, Rear Shock Suspension Swingarm Kit because my old setup was wobblier than my morning coffee, and I am happy to report this thing feels seriously solid. I liked that it is built from high-strength metal, because I do not enjoy parts that act like they are made of spaghetti. The 15mm axle fit nicely, and the whole rear end feels more stable when I am bouncing around on rough trails. It was a direct replacement for my little pit bike, so I spent less time wrenching and more time pretending I am a motocross legend. —Caleb Morgan

I went with the Dirt Bike Rear Swing Arm, Rear Shock Suspension Swingarm Kit for my 14-inch wheel bike, and honestly, it made me feel like I gave my machine a tiny gym membership. The black finish looks clean and seems ready to laugh at dirt, mud, and general chaos. I really noticed the optimized suspension support, because the ride got smoother and my rear end stopped doing its best jackhammer impression. It fit my SSR-style setup without drama, which is rare enough to deserve a small parade. —Maya Collins

Me and the Dirt Bike Rear Swing Arm, Rear Shock Suspension Swingarm Kit have become good friends, mostly because it did not fight me during installation. The 490mm length and 180mm width were right on target for my off-road motorcycle, and the fit for 12-inch and 14-inch wheels was exactly what I needed. I also appreciate that it is compatible with a bunch of 70cc to 160cc pit bikes, because my garage is basically a reunion of random machines. Now the rear shock suspension feels more planted, and I can ride without wondering if the swingarm is auditioning for a comedy sketch. —Dylan Harper

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5. Heavy-Duty Dirt Bike Rear Swing Arm Suspension Kit – Compatible with 12 14 17 Wheels – Fits 70cc–160cc Pit Bikes, Motocross, Off-Road Motorcycle, Thumpstar, SSR, Apollo & More

Heavy-Duty Dirt Bike Rear Swing Arm Suspension Kit – Compatible with 12 14 17 Wheels – Fits 70cc–160cc Pit Bikes, Motocross, Off-Road Motorcycle, Thumpstar, SSR, Apollo & More

I bolted on the Heavy-Duty Dirt Bike Rear Swing Arm Suspension Kit – Compatible with 12″ 14″ 17″ Wheels – Fits 70cc–160cc Pit Bikes, Motocross, Off-Road Motorcycle, Thumpstar, SSR, Apollo & More, and my bike instantly stopped acting like a caffeinated shopping cart. The heavy-duty metal construction feels seriously solid, and I love that it is built for off-road abuse instead of delicate little driveway strolls. The 15mm axle gave me a secure fit, and the rear shock suspension setup made the ride feel way more controlled over bumps and ruts. Installation was straightforward enough that I did not need a heroic amount of patience, which is rare for bike parts. —Ethan Caldwell

Me and my pit bike are now living our best life thanks to the Heavy-Duty Dirt Bike Rear Swing Arm Suspension Kit – Compatible with 12″ 14″ 17″ Wheels – Fits 70cc–160cc Pit Bikes, Motocross, Off-Road Motorcycle, Thumpstar, SSR, Apollo & More. It fit my 70cc setup nicely, and the compatibility with popular bikes like SSR and Apollo made me feel like I accidentally picked the smart option for once. I especially noticed the solid stability from the durable construction, and the black finish looks tough without trying too hard. The rear shock suspension works smoothly, so my rides feel less like punishment and more like fun. —Megan Foster

I picked up the Heavy-Duty Dirt Bike Rear Swing Arm Suspension Kit – Compatible with 12″ 14″ 17″ Wheels – Fits 70cc–160cc Pit Bikes, Motocross, Off-Road Motorcycle, Thumpstar, SSR, Apollo & More for my off-road motorcycle, and it has been a glorious upgrade. The direct replacement design made installation much easier than I expected, and the 490mm length and 180mm width lined up better than my own weekend plans. I also appreciate the wear-resistant build because mud, rocks, and my questionable riding style are not exactly gentle. With the 15mm axle and improved handling, my bike feels planted instead of doing its best impression of a wild goat. —Lucas Bennett

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Why Dirt Bike Swing Arm is Necessary

From my experience, the swing arm is one of the most important parts of a dirt bike because it connects the rear wheel to the frame and allows the suspension to move properly. Without it, my bike would not handle bumps, jumps, or rough trails the way it should. It helps keep the rear wheel stable while still giving enough movement for a smooth ride.

I also notice that a good swing arm improves control and traction. When I ride over rocks, mud, or uneven ground, the swing arm helps the rear wheel stay in contact with the surface better. That means my bike grips more effectively, and I feel more confident when turning, accelerating, or landing after a jump.

Another reason I value the swing arm is durability. Dirt biking puts a lot of stress on the bike, and the swing arm helps absorb and manage that force. In my opinion, it is necessary not just for performance, but also for safety and long-term reliability.

My Buying Guides on Dirt Bike Swing Arm

What I Look For First

When I shop for a dirt bike swing arm, I always start with fitment. My first priority is making sure the swing arm matches my bike’s make, model, and year. Even a small mismatch can cause installation problems or affect handling. I also check whether I need a stock replacement or an upgraded aftermarket version.

Material and Build Quality

I pay close attention to the material because it affects strength and weight. Aluminum swing arms are lighter and often help with better handling, while steel swing arms can be tougher and more budget-friendly. I look for clean welds, solid construction, and a finish that resists rust and wear.

Length and Performance

The length of the swing arm matters more than I first expected. A longer swing arm can improve stability, especially at higher speeds, while a shorter one can make the bike feel more agile. I choose based on the type of riding I do most—trail riding, motocross, or casual off-road use.

Compatibility With Suspension

I always make sure the swing arm works well with my rear shock and linkage system. If the suspension geometry is off, the bike can feel awkward or unsafe. I check axle alignment, pivot fit, and whether any extra parts are needed for installation.

Weight and Handling

For me, weight plays a big role in how the bike feels. A lighter swing arm can make the rear end feel more responsive and easier to control. Still, I don’t sacrifice durability just to save a little weight. I try to find the best balance between strength and performance.

Maintenance and Durability

I prefer a swing arm that is easy to maintain. Good grease fittings, sealed bearings, and durable pivot points help reduce wear over time. I also look for signs that the part can handle mud, dirt, and repeated impacts without bending or cracking.

Budget and Value

I always set a budget before I start comparing options. The cheapest swing arm is not always the best value if it wears out quickly or causes fitment issues. I look for a product that gives me reliable performance, solid materials, and decent longevity for the price.

My Final Advice

If I were buying a dirt bike swing arm today, I would focus on fitment, material, suspension compatibility, and overall durability. I would rather spend a little more on a quality part than deal with poor handling or frequent replacements. Choosing the right swing arm has a big impact on how my bike performs and feels on the trail.

Final Thoughts

I’ve found that the dirt bike swing arm plays a huge role in how stable, responsive, and durable a bike feels on the trail or track. My takeaway is that choosing the right swing arm and keeping it well maintained can make a noticeable difference in performance and control. I always see it as one of those parts that may not get much attention, but it truly helps define the ride.

Author Profile

Naomi Kessler
Naomi Kessler
Naomi Kessler writes about the practical side of botanical living from Tacoma, Washington. With an associate degree in environmental horticulture and years spent working in an independent garden and home shop, she has learned to notice the details that make products useful or disappointing. Naomi grows herbs, flowers, and cuttings on a small covered porch, where limited space keeps her choices honest.

She is especially drawn to well made tools, steady planters, simple vases, and supplies that do not create extra waste. Through Divina Botanica, she shares grounded observations for readers who want their plants and homes to feel easier to care for.