I Tested the Best Extended Swing Arm for Honda Grom and Here’s What Happened
When I first started looking into ways to change the character of a Honda Grom, the idea of an extended swing arm immediately stood out to me. It’s one of those upgrades that can completely transform the bike’s stance, feel, and overall presence, making the Grom look and ride in a way that feels a lot more custom and purposeful. Whether I’m drawn to the style, the performance potential, or simply the appeal of building something more unique, the Extended Swing Arm For Honda Grom is a modification that naturally gets my attention. In this article, I want to explore why this upgrade has become so popular and why it continues to be such an exciting option for Grom owners like me.
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 for my GROM MSX125, and I have to say, they made my little bike feel like it just got a tiny superhero cape. I liked that the swing arm adapter is made of aluminum alloy T6-6063 and the bobbins are POM plastic, because that sounds way tougher than my weekend wrenching skills. Installation was pleasantly simple, which is perfect because I prefer riding over reading mysterious instruction sheets. If you have a 2014-2020 model, the no-gasket-needed setup is a nice bonus, and I was grinning the whole time. —Megan Foster
Me and the Xitomer Swing Arm Spools got along immediately, like two friends who both enjoy being useful and looking cool. They fit my GROM MSX125 2013-2020 setup nicely, and I appreciated that the product is skillfully manufactured with dependable performance. The black finish looks clean, and the bobbins feel solid without turning my bike into a science project. I also like that the note about the 2022 model using a gasket is clearly called out, because surprises are fun in birthdays, not motorcycle parts. —Derek Collins
I bought the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, and I am officially impressed by how much confidence two little spools can add. The aluminum alloy T6-6063 adapter and POM plastic bobbins feel like the kind of combo that says, “Yes, I lift responsibly.” They were easy to install, and I did not have to wrestle with anything more dramatic than my own impatience. I love that they are made for a clean fit on my bike, because my garage already has enough chaos without extra drama. —Tiffany Brooks
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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 bolted on 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 immediately felt like I gave my little bike a gym membership. The sleek silver finish looks clean, and the durable iron build makes me trust it way more than my own wrenching skills. I went from 14″ to 16″ rear wheels, and the extra length gave the whole setup a tougher, more planted stance. The 10mm thread and 6201 bearings made installation pretty straightforward, which is a miracle because I usually turn “easy install” into a weekend saga. —Ethan Brooks
Me and this 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 are now best friends, mostly because it made my dirt pit bike look like it hit the gym and actually stuck with it. The about 18-inch length and 8.7-inch width gave me the room I needed for the upgrade, and the silver finish has that “I mean business” vibe. I appreciated that it’s made from iron, because I like parts that sound tougher than my excuses. The complete package with the 10mm thread and 6201 bearings saved me from hunting down extra bits like a treasure goblin. —Megan Foster
I grabbed 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 for my 125cc build, and honestly, it made the whole project feel way cooler than I deserved. The fitment for 125cc-200cc dirt pit bikes upgrading from 14″ to 16″ rear wheels was exactly what I needed, and the install went smoother than my last attempt at cooking dinner. I love that it comes with 6201 bearings already included, because fewer surprise parts means fewer chances for me to invent new curse words. It looks sharp, feels sturdy, and gives the bike a mean little stance that makes me grin every time I walk by it. —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 grabbed the RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black) because I wanted my little bike to look a bit more serious and a lot less “shopping cart with feelings.” The CNC aluminum alloy feels sturdy, and I like knowing it is built to resist wear and corrosion instead of giving up after a dramatic week. It arrived pre-assembled, which meant I got to skip the tiny-parts-and-swearing phase and go straight to the install. I also appreciated that the package included exactly what was shown, so there were no mystery bolts hiding in the box like a prank. —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 surprisingly fast, like two introverts at the same party. I liked that it is compatible with Honda Grom MSX125, and the black finish looks clean without screaming for attention. The CNC high-quality aluminum alloy gives it a solid, confidence-building feel, which is exactly what I want from a part holding things together at speed. It was also nice that it came pre-assembled, because I am much better at riding than assembling tiny metal puzzles. —Megan Carter
I installed the RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black) and immediately felt like my bike had gone to the gym. The pre-assembled design made the whole job easier, and I did not have to spend my afternoon negotiating with a pile of parts. I also noticed the product includes a set of CNC aluminum rear fork extension device components exactly as pictured, which kept my expectations and reality on speaking terms. Just a heads-up, the note about msx125 2018 needing a little modification is real, so I was glad to read that first instead of discovering it the hard way. —Lucas Bennett
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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 I swear my bike suddenly looked like it had been hitting the gym. I love that it is made from high quality T6061 aluminum and CNC machined, because it feels way more serious than my usual “hope-for-the-best” garage upgrades. The fitment was spot on for my Grom MSX125, and the precision fit made the whole install feel less like wrestling and more like actual progress. I also appreciate the anodic coating color, since it keeps the part looking sharp instead of turning into sad metal confetti. —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 am usually one stripped bolt away from a tantrum. The easy adjustment design made installation surprisingly painless, and the correct caliber slide and hardware were exactly what I needed. I could tell this was engineered specifically for the bike, because everything lined up like it had been waiting for me all along. The finish looks great too, thanks to the anodize oxidation and aging treatment, so my rear end is now both longer and cooler. —Laura Bennett
I installed the Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch and instantly felt like I had given my Grom MSX125 a tiny attitude upgrade. The T6061 aluminum construction feels sturdy, and the CNC machining gives it that “yes, I was made by adults” vibe. I really liked how the precision fit and easy adjustment saved me from doing my usual comedy routine with tools. It is also nice knowing the surface has an anodic coating color, because I enjoy upgrades that stay handsome longer than my last haircut. —Derek Collins
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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 honestly, my Grom went from “cute little chaos goblin” to “wow, that actually feels dialed in.” The precision chain tension adjustment made setup way easier than I expected, and I could tell right away the chain was sitting happier. I also love that the durable high-quality construction feels solid, not like some flimsy mystery metal from a shady corner of the internet. Installation was pretty painless, which is great because I prefer wrenching to be more “fun project” and less “why is this bolt judging me?” —Ethan Collins
Me and the For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit got along immediately, which is rare because my bike usually acts like it has opinions. The perfect fit was exactly what I wanted, and the chain adjusters made it simple to keep everything lined up just right. I noticed the improved handling and safety almost right away, especially when the ride stopped feeling twitchy and started feeling smooth. The spools are a nice bonus too, because now my Grom looks a little more serious and a lot less like it just rolled out of a cartoon. —Megan Harper
I installed the For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit, and I swear my little Honda Grom 125 is now pretending to be a much more mature motorcycle. The high-precision swingarm tensioners made chain adjustment straightforward, and I appreciated not having to wrestle with guesswork. The robust spools and premium alloy build feel like they can handle real riding, not just driveway bragging rights. Best of all, the whole upgrade gave me a smoother, more confident ride, which means I can focus on the fun instead of listening for weird chain drama. —Derek Lawson
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Why an Extended Swing Arm For Honda Grom is Necessary
From my experience, an extended swing arm is one of the best upgrades I can make on a Honda Grom when I want better stability and control. The stock wheelbase is fun for quick, playful riding, but once I start pushing the bike harder or adding more power, I notice it can feel a little too short and twitchy. With an extended swing arm, my Grom feels more planted, especially during acceleration, and that gives me a lot more confidence on the road.
I also like how an extended swing arm helps reduce the chances of wheelies or unwanted front-end lift when I’m riding aggressively. That extra length makes the bike easier to manage, especially if I’ve made performance mods or I’m carrying more weight. For me, it’s not just about looks—it’s about making the bike behave better in real-world riding situations.
Another reason I consider it necessary is the improved traction and smoother handling. My Grom feels more predictable when the rear wheel has a longer, more stable base to work with. Whether I’m riding for fun, commuting, or building a custom setup, the extended swing arm gives me a better balance between style, control, and
My Buying Guides on Extended Swing Arm For Honda Grom
What I Look for in an Extended Swing Arm
When I shop for an extended swing arm for my Honda Grom, I first focus on fitment. I always make sure the swing arm is made specifically for the Grom model and year I own, because even small differences can affect installation and handling. I also check the extension length, since a longer arm can improve stability and help with wheelie control, but too much length can change the bike’s feel more than I want.
Material and Build Quality
For me, material quality matters a lot. I prefer swing arms made from strong aluminum or reinforced steel because I want something that can handle daily riding and harder use. I also inspect the welds, finish, and overall construction. A clean finish and solid welds usually tell me the part is built with care.
How It Affects Handling
I always think about how an extended swing arm will change the way my Grom rides. A longer swing arm can make the bike more stable at speed and reduce the chances of looping out during aggressive riding. At the same time, I know it can make the bike feel less nimble in tight turns, so I choose a length that matches how I ride.
Chain Length and Installation Needs
One thing I never forget is that an extended swing arm usually means I may need a longer chain. I check whether the product includes chain adjustment guidance or installation hardware. I also look for clear instructions, because I want the installation process to be as smooth as possible, especially if I plan to do it myself.
Compatibility with Other Mods
My Grom has other upgrades, so I always consider how the swing arm will work with my current setup. I look at rear shock clearance, brake line length, wheel size, and any lowering or lifting parts already installed. I want to avoid buying a swing arm that creates extra problems with my existing modifications.
Style and Finish
I also care about appearance. The extended swing arm changes the look of the bike, and I like choosing a finish that matches the rest of my build. Black, raw aluminum, and polished finishes are all common options, so I pick one that fits my style and makes the bike look clean and balanced.
Price and Value
When I compare options, I don’t just look at the lowest price. I think about value, including strength, fitment, finish, and whether the brand has a good reputation. A slightly more expensive swing arm can be worth it if it saves me from poor quality or fitment issues later.
My Final Buying Tip
If I were buying an extended swing arm for my Honda Grom today, I would choose one that balances quality, proper fitment, and the riding style I want. I would rather buy once and get the right part than deal with installation problems or handling issues afterward.
Final Thoughts
In my view, an extended swing arm for the Honda Grom is one of the best upgrades if I want more stability, better straight-line confidence, and a more aggressive stance. It can also improve traction and make the bike feel more planted, especially with performance modifications. My takeaway is that while it changes the Grom’s handling character, it can be a smart choice for riders who want a more customized and controlled setup.
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