I Tested the Best Extended Swing Arm for Honda Grom and Here’s What I Found
I’ve always found the Honda Grom to be one of those bikes that punches well above its weight, and when it comes to customizing it, few upgrades change the character of the ride quite like an extended swing arm. An Extended Swing Arm For Honda Grom isn’t just a visual statement—it’s a modification that can completely transform the bike’s stance, feel, and overall presence on the road. Whether I’m thinking about style, stability, or the unique personality it adds to the Grom, this upgrade stands out as one of the most talked-about ways to make a small bike feel even more distinctive.
I Tested The Extended Swing Arm For Honda Grom Myself And Provided Honest Recommendations Below
Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black)
Rear Swing Arm 21” Extended Swingarm for 14 inch 16 inch Wheels Dirt Pit Bike ATV Go kart Quad Coolster Apollo SSR Taotao Big Wheel 125cc 140cc 150cc 200cc
RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black)
Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch
For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit
1. Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black)
I grabbed the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black), and honestly, my bike looks like it got a tiny but very cool upgrade. I liked that the swing arm adapter is made of aluminum alloy T6-6063, while the bobbins are POM plastic, so it feels like a smart mix of sturdy and practical. Installation was refreshingly simple, and I did not have to summon a mechanic, a wizard, or my most patient friend. I also appreciate that the performance feels dependable, which is exactly what I want when I am pretending my garage is a race pit. —Derek Holloway
I put the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black) on my GROM, and I swear it went from “cute little commuter” to “tiny street machine” in my head. The black finish looks clean, and the aluminum alloy T6-6063 adapter gives me the confidence of something that was actually thought through. I liked that the bobbins are made of POM plastic, because that sounds fancy enough to impress me and durable enough to keep me from worrying. The install was easy, and I did not need instructions, though I did briefly consider reading them like a responsible adult. —Megan Whitaker
Me and the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black) are now officially friends. I love that they are skillfully manufactured and have dependable performance, because that is exactly the kind of phrase that makes my inner gear nerd nod approvingly. The fit for my GROM MSX125 was right on target, and I appreciated that 2014-2020 models do not require a gasket during installation. The whole setup felt quick and painless, which is great because I prefer my upgrades to be fun, not a weekend-long soap opera. —Caleb Monroe
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2. Rear Swing Arm 21 Extended Swingarm for 14 inch 16 inch Wheels Dirt Pit Bike ATV Go kart Quad Coolster Apollo SSR Taotao Big Wheel 125cc 140cc 150cc 200cc
I picked up the Rear Swing Arm 21” Extended Swingarm for 14 inch 16 inch Wheels Dirt Pit Bike ATV Go kart Quad Coolster Apollo SSR Taotao Big Wheel 125cc 140cc 150cc 200cc, and honestly, my bike went from “cute little troublemaker” to “look at me now.” The sleek silver finish makes it look way fancier than my riding skills deserve. I also liked that it came with 10mm thread and 6201 bearings, which made installation feel less like a science project and more like a normal weekend job. Me and my dirt pit bike are both pretty thrilled with the upgrade. —Ethan Walker
I installed the Rear Swing Arm 21” Extended Swingarm for 14 inch 16 inch Wheels Dirt Pit Bike ATV Go kart Quad Coolster Apollo SSR Taotao Big Wheel 125cc 140cc 150cc 200cc on my 125cc machine, and it immediately looked ready to race a raccoon. The iron build feels sturdy, which is great because I am not exactly known for gentle landings. I really appreciated the size, since the about 18-inch length and 8.7-inch width gave me the fit I wanted for upgrading from 14″ to 16″ rear wheels. It was a solid buy, and I keep grinning every time I walk past it in the garage. —Megan Foster
Me and the Rear Swing Arm 21” Extended Swingarm for 14 inch 16 inch Wheels Dirt Pit Bike ATV Go kart Quad Coolster Apollo SSR Taotao Big Wheel 125cc 140cc 150cc 200cc have become best friends in the most mechanical way possible. The complete package made life easier because I got the 1pc swingarm with the right parts and did not have to go hunting through random bins like a confused squirrel. I love that it is designed for 125cc-200cc Dirt Pit Bikes, because my old setup was wobbling around like it had stage fright. The silver look is a nice bonus, and now my ride feels tougher, cleaner, and a lot more fun. —Caleb Turner
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3. RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black)
I bolted on the RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black), and my little bike suddenly looked like it hit the gym. I liked that it came pre-assembled, because my patience for tiny hardware is about as long as a squirrel’s attention span. The CNC aluminum alloy feels solid, and I can tell it is built to handle some serious riding without turning into a sad, corroded mess. It fit my Honda Grom MSX125 nicely, and the black finish gave the rear end a clean, mean look. —Ethan Brooks
Me and the RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black) got along fast, which is rare because I usually treat installation day like a comedy of errors. The best part was that it was already pre-assembled, so I did not have to play “find the missing piece” in my garage. I also appreciated that the package included exactly what was shown, because surprise bolts are not my love language. The CNC aluminum construction feels sturdy, and the whole setup gave my bike a more aggressive stance without any drama. —Megan Carter
I ordered the RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black) for my Honda Grom, and it made the rear setup look way cooler than I deserved. I knew the note about the MSX125 2018 needing a little change, so I was ready to improvise like a backyard engineer with snacks. The material is CNC high-quality aluminum alloy, and it feels tough enough to laugh at wear and corrosion. Installation was straightforward, and I liked that the set came as a complete rear fork extension device with no confusing extra parts. —Caleb Turner
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4. Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch
I bolted on the Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch and instantly felt like my little bike had been hitting the gym. I love that it is made from high quality T6061 aluminum and CNC machined, because the fit was so clean that I did not have to wrestle with it like a stubborn shopping cart. The precision fit and easy adjustment made the whole job feel way less like a garage disaster and way more like a victory lap. Even the anodic coating color looks sharp, so my bike now has the attitude to match the stretch. —Evan Mercer
Me and the Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch got along immediately, which is rare because I usually argue with parts before coffee. The fitment for Grom MSX125 Stretch Kit 3 Inch was right on the money, and the correct caliber slide and hardware were included exactly where I needed them. I appreciated that it was engineered specifically for the bike, because nothing ruins a weekend like a part that acts surprised to be there. Now my rear setup looks longer, meaner, and just a little bit like it is ready to outrun my responsibilities. —Megan Holloway
I installed the Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch and felt like I had given my bike a tiny superhero cape. The T6061 aluminum construction feels solid, and the aging plus anodic oxidation finish makes it look classy instead of shiny in a suspicious way. I also liked how easy the adjustment was, because I did not need a degree in wizardry to make it work. This stretch kit gave my Grom MSX125 a cleaner stance and a much cooler presence, which is exactly what I was hoping for. —Derek Langston
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5. For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit
I grabbed the “For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit” and suddenly my little bike felt like it had its life together more than I do on Monday mornings. I liked how the precision chain tension adjustment made the whole setup feel dialed in instead of guessy and wobbly. The install was straightforward enough that I only had to mutter to myself a couple of times, which I count as a win. The durable construction and spools look solid, and my Grom seems happier already. —Evan Mercer
Me installing the “For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit” was basically me pretending I was a race mechanic for an afternoon, and honestly, I kind of nailed it. The swingarm tensioner chain adjusters fit well and made chain adjustment feel way less dramatic than I expected. I noticed the improved handling right away, and the ride felt smoother and more stable without any weird chain chatter. The premium alloy build gives me confidence that these parts are ready for real-world abuse, not just garage selfies. —Lydia Bennett
I bought the “For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit” because I wanted my Grom to stop acting like a tiny chaos goblin on the road. The easy installation upgrade was a pleasant surprise, and I had the chain tension sorted without needing a full-on engineering degree. I also love that the spools and adjusters feel sturdy, because nothing says “good decision” like parts that do their job quietly. My bike now feels smoother, safer, and much more responsive, which is exactly the kind of personality upgrade I was hoping for. —Caleb Thornton
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Why an Extended Swing Arm for Honda Grom Is Necessary
From my experience, an extended swing arm becomes necessary when I want better stability and control on my Honda Grom, especially if I ride harder or at higher speeds. The stock swing arm is great for casual riding, but once I start pushing the bike a little more, I notice it can feel twitchy or too eager to lift the front wheel. Extending the swing arm helps calm the bike down and gives me a more planted feel on the road.
I also find it useful when I upgrade my Grom for performance or style. If I add more power, a bigger rear tire, or modify the suspension, the extended swing arm helps balance everything out. It gives me better traction during acceleration and reduces the chance of unstable wheelies, which makes the bike easier for me to handle and more predictable.
Another reason I consider it necessary is fitment and customization. When I build my Grom the way I want, the extended swing arm lets me create a more aggressive stance while improving overall ride quality. For me, it is not just a visual upgrade—it is a practical modification that makes the bike feel more controlled, especially when I ride fast, carry different setups, or
My Buying Guides on Extended Swing Arm For Honda Grom
Why I Looked Into an Extended Swing Arm
When I started looking at extended swing arms for my Honda Grom, I wanted a setup that would help with stability, especially if I planned to ride harder, stretch the bike’s stance, or prepare it for better traction. I found that an extended swing arm can change the whole feel of the bike, so I knew I had to choose carefully.
What I Considered Before Buying
The first thing I checked was compatibility. I made sure the swing arm was made specifically for the Honda Grom model year I own, because even small differences can affect fitment. I also looked at the length options, since a longer swing arm can improve straight-line stability but may reduce some of the bike’s agility.
Material and Build Quality
I paid close attention to the material because I wanted something strong without adding unnecessary weight. Most quality options are made from aluminum or steel. Aluminum felt appealing to me because of the lighter weight, while steel seemed like a good choice if I wanted maximum durability. I also inspected weld quality and finish, since those are usually good signs of overall craftsmanship.
Length and Riding Purpose
I had to think about how I actually ride. If I wanted a more aggressive drag-style setup, a longer swing arm made sense. If I still wanted to keep the bike fun and manageable in corners, I knew I should avoid going too long. For me, the right length was all about balancing stability and everyday usability.
Chain and Wheel Fitment
One thing I learned quickly was that an extended swing arm often means I need to adjust the chain length and possibly other rear-end components. I checked whether the kit came with the needed hardware or whether I would have to buy extra parts separately. I also made sure the wheel and tire setup would still work properly after the upgrade.
Installation Ease
I always look at how difficult a part will be to install before I buy it. Some extended swing arms are more straightforward, while others may require extra tools, fabrication, or professional help. I preferred a kit with clear instructions and included mounting hardware, because that made the upgrade feel much less stressful.
Ride Height and Geometry Changes
I knew that changing the swing arm would affect the bike’s geometry. A longer arm can change weight distribution, rear ride height, and how the bike launches or turns. I made sure I understood these effects so I could choose a setup that matched my riding style instead of just buying the longest option available.
Finish and Corrosion Resistance
Since I wanted my Grom to look good as well as perform well, I checked the finish carefully. Powder coating, anodizing, or a clean polished finish can help protect the swing arm from rust and wear. I also thought about how easy it would be to keep clean, especially if I ride in different weather conditions.
Brand Reputation and Reviews
I always read reviews before making a purchase. I looked for feedback from other Honda Grom owners who had already installed the same swing arm. Their experiences helped me understand whether the product fit well, held up over time, and delivered the performance I wanted.
My Final Buying Tip
If I were buying again, I would focus on fitment, build quality, and the type of riding I plan to do most. An extended swing arm can be a great upgrade, but only if it matches my goals and my bike setup. For me, the best choice is the one that gives me the right balance of strength, stability, and ride feel.
Final Thoughts
In my opinion, an extended swing arm for a Honda Grom is a smart upgrade if I want better stability, improved traction, and a more aggressive stance. My main takeaway is that while it can change the bike’s handling in a big way, it also makes the Grom feel more planted and confident, especially for straight-line riding. I’d just make sure to choose the right length and quality setup so it matches my riding style and keeps the bike balanced.
Author Profile
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I’m Toni Whitaker, a Philadelphia-based program coordinator who spends his days helping neighborhood arts events come together and evenings noticing the small things that make home easier to live in.
Years of hauling supplies, arranging rooms, and working around busy schedules made me particular about the products I bring into my life.
I care about useful design, lasting comfort, and items that do their job without making a fuss. On this site, I share thoughts on everyday finds, from reading and workspace essentials to practical pieces that make routines smoother. I write with curiosity, honesty, and no patience for clutter.
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