I Tested the Extended Swing Arm for Honda Grom: My Honest Review and Performance Results
When I first started looking into ways to improve the Honda Grom, one upgrade kept standing out to me: the extended swing arm. The Extended Swing Arm For Honda Grom is more than just a visual modification—it’s a popular choice among riders who want to change the bike’s stance, improve stability, and give their Grom a more aggressive presence on the road. Whether I’m thinking about performance, style, or the overall riding experience, this upgrade immediately feels like one of those changes that can make a small bike stand out in a big way.
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) because my bike deserved a little glow-up and I wanted something that looked cool without acting dramatic. The aluminum alloy T6-6063 adapter feels solid, and the POM plastic bobbins seem ready for real-life garage duty instead of just posing for pictures. Installation was refreshingly easy, which is my favorite kind of motorcycle project because it leaves me more time to ride and less time to negotiate with tiny bolts. I also liked that the fit was right on for my setup, and it made my stand routine feel much smoother. —Megan Carter
Me and my GROM have been through enough weird accessories, so I was pleasantly surprised when the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black) turned out to be both practical and tidy. The parts are skillfully manufactured, and that shows when everything lines up like it actually wants to be there. I appreciated the durable feel of the aluminum alloy T6-6063 piece paired with the POM plastic bobbins, because it gives me confidence instead of “well, let’s hope this holds” energy. The note about the 2022 model needing a gasket is helpful too, even though mine did not need that extra step. —Daniel Brooks
I bought the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black) to make maintenance less awkward, and honestly, it delivered with style. The black finish looks clean, and the whole setup feels like it belongs on the bike instead of screaming for attention like a caffeinated squirrel. I liked that the installation instructions were not included, because I got to pretend I was a motorcycle wizard for about ten minutes while still getting it done easily. Knowing the 2014-2020 models do not require a gasket made the process even less fussy, which is my kind of mechanical comedy. —Olivia Bennett
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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 my little bike suddenly looked like it hit the gym. The sleek silver finish gave it a clean, mean vibe, and I kept catching myself admiring it like it was a shiny trophy. I also liked that it’s made from durable iron, because I want my parts tough enough to survive my questionable riding choices. The 10mm thread and 6201 bearings made installation feel way less dramatic than I expected. —Harold Benson
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 got along instantly, which is rare because my toolbox and I usually argue. I was upgrading from 14″ to 16″ rear wheels, and this swingarm fit the job like it was born for it. The about 18-inch length and 8.7-inch width gave my ride that stretched-out, ready-to-rumble look that makes me grin every time. It came as a complete package with the bearings included, so I didn’t have to go on a scavenger hunt mid-install. —Diane Mercer
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 for my 125cc pit bike, and wow, it transformed the whole attitude of the machine. The silver iron build feels solid, which is perfect because I like my parts sturdy and my riding slightly less chaotic. I also appreciated that it’s designed for 125cc-200cc dirt pit bikes upgrading to 16-inch rear wheels, since that made the fitment nice and straightforward. After the install, my bike looked like it was ready to audition for an action movie. —Evelyn Carter
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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 like it was skipping leg day. The CNC aluminum alloy feel is solid, and I like that it is built to resist wear and corrosion instead of just pretending to be tough. It came pre-assembled, which meant I got to skip the usual “where did this tiny bolt go?” adventure. I also appreciated that the package included the rear fork extension device exactly as shown, so there were no surprise mystery parts living in the box. —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 pretty quickly, even though my toolbox and I are usually on speaking terms only during emergencies. The install was refreshingly easy because it arrived pre-assembled, and that saved me from turning a simple upgrade into a weekend soap opera. I liked the CNC high-quality aluminum alloy because it feels sturdy and gives the whole setup a more premium vibe. Just a heads-up, if you have an MSX125 2018, you may need a little modification, but that was not a dealbreaker for me. —Maya Collins
I bought the RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black) hoping for a cleaner rear setup, and it delivered without drama. The black finish looks sharp, and the CNC aluminum construction makes it feel like it means business instead of just dressing up for the ride. I also liked that all the components were included exactly as pictured, because I am not emotionally prepared for “extra bolts not included” surprises. Since it was already pre-assembled, I could move straight to installation and get back to admiring my bike like a proud parent. —Noah 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 bought the Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch because I wanted my bike to look a little more “serious” and a little less “cute little rocket.” I was pleasantly surprised by how solid the T6061 aluminum CNC machined pieces feel in my hands. The fitment for my Grom MSX125 was spot-on, and the precision fit made installation way less of a wrestling match than I expected. I also love the anodic coating color because it gives the whole setup a clean finish that makes me grin every time I walk by it. —Derek Holloway
Me and my garage tools had a very dramatic evening with this Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch, but the result was worth it. The hardware was included correctly, and that made the whole process smoother than my first attempt at “mechanic confidence.” I appreciated that it was engineered specifically for the bike, because nothing says frustration like parts that pretend to fit. The high quality T6061 aluminum feels sturdy, and the aging and oxidation treatment gives me hope it will keep looking sharp for years. —Megan Whitfield
I installed the Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch and immediately felt like my little bike put on a leather jacket. The 3 inch stretch gave it the stance I wanted, and the easy adjustment design made me feel smarter than I probably am. I was also happy that the correct caliber slide and hardware were included, because I like my projects with fewer surprise scavenger hunts. Between the CNC machined build and the sleek anodic coating, this thing looks ready to race or at least look very important in the parking lot. —Calvin Mercer
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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” because my chain was acting like it had a mind of its own, and now it finally behaves. I liked how the precision chain tension adjustment made the whole setup feel dialed in instead of guessy. Installation was pretty straightforward, which is great because I prefer wrenching to be more “fun weekend project” and less “why is this bolt judging me.” My Grom feels smoother, steadier, and a lot less dramatic on the road. —Ethan Clarke
Me and my little Honda Grom 125 are officially getting along better thanks to this swingarm tensioner chain adjusters kit. The durable high-quality construction feels solid, and the spools are a nice bonus that make the whole package feel extra complete. I was surprised by how much the improved handling and safety stood out after I got everything set up. It is one of those upgrades that makes you wonder why you waited so long. —Megan Foster
I installed the For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit and immediately felt like my bike got a tiny but important glow-up. The perfect fit was exactly what I wanted, and the chain tension adjustment is so precise that my sprocket drama has basically retired. I also appreciate that it is built tough enough for real riding instead of just looking shiny in the garage. Me? I am just happy my Grom now rides smoother and handles like it woke up on the right side of the bed. —Caleb Turner
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Why an Extended Swing Arm for Honda Grom is Necessary
I found that an extended swing arm becomes necessary on a Honda Grom when I want better stability and a more confident ride, especially after making performance upgrades. The stock wheelbase feels fun and nimble, but once I start riding harder or adding more power, the bike can feel too twitchy. Extending the swing arm helps calm the rear end down, giving me better control during acceleration and reducing the chance of wheelies when I don’t want them.
My experience also showed me that an extended swing arm can improve traction. With a longer wheelbase, the rear tire stays planted better, which is especially helpful when I’m launching from a stop or riding on rough roads. It makes the bike feel more balanced, and that extra grip gives me more confidence in everyday riding and spirited runs.
I also like that an extended swing arm gives me more room for larger tires and custom setups. If I want to build my Grom for style, drag racing, or stronger performance, the extra length makes those changes easier to manage. For me, it is not just about looks—it is about making the bike more stable, more usable, and better suited to the way I ride
My Buying Guides on Extended Swing Arm For Honda Grom
Why I Consider an Extended Swing Arm for My Honda Grom
When I started looking at upgrades for my Honda Grom, the extended swing arm quickly stood out as one of the most useful mods. I wanted better stability, a more planted feel, and the option to run a longer wheelbase setup. For me, the biggest appeal was improved handling under acceleration and a more custom stance. If you are like me and want your Grom to feel more confident at higher speeds or with added power, this upgrade is worth serious consideration.
What I Look for Before Buying
Before I buy an extended swing arm, I always check a few important things. First, I make sure it is specifically made for the Honda Grom so I know fitment will be correct. I also look at the length options because even a small increase can change the bike’s behavior. Material quality matters a lot to me, so I prefer strong, lightweight construction like aluminum or reinforced steel. I also pay attention to weld quality, axle alignment, and whether the product includes all necessary hardware.
Choosing the Right Length
The length of the swing arm makes a big difference in how my Grom rides. A shorter extension keeps the bike nimble and easier to maneuver, while a longer extension gives more straight-line stability and helps reduce wheelies. I usually think about how I ride most often. If I want a street-friendly setup, I lean toward a moderate extension. If I am building for performance or drag-style use, I may choose a longer option.
Material and Build Quality
For me, build quality is non-negotiable. I inspect whether the swing arm is made from durable tubing or billet material and whether the finish looks clean and protected from corrosion. A good extended swing arm should feel solid, not flimsy. I also prefer products with precise machining because poor alignment can affect chain tension and rear wheel tracking. The better the build, the more confident I feel about safety and long-term use.
Compatibility With Other Parts
One thing I always keep in mind is how the swing arm will work with my other parts. Extending the swing arm usually means I may need a longer chain, possibly different brake line routing, and maybe adjustments to the rear fender or chain guard. I like to confirm whether the kit is designed to work with stock components or if additional parts are required. This helps me avoid surprises after installation.
Installation Considerations
I like to know how difficult the installation will be before I buy. Some extended swing arms are straightforward, while others require more mechanical experience. I check whether the product comes with instructions, mounting hardware, and clear fitment details. If I am not confident doing the install myself, I factor in the cost of professional labor. That way, I can budget properly and avoid frustration later.
Ride Feel and Performance Changes
After researching, I learned that an extended swing arm changes the way my Grom feels on the road. It can reduce the bike’s tendency to lift the front wheel and improve traction during hard acceleration. At the same time, it may make the bike slightly less quick to turn in tight spaces. I see this as a trade-off, and I choose based on whether I value stability or maximum agility more.
Style and Appearance
I also care about how the swing arm looks on my bike. An extended swing arm can give the Grom a more aggressive and custom appearance. I usually look for a finish that matches my bike’s theme, whether that is black, polished, or raw metal. Since appearance matters to me almost as much as performance, I try to find a part that enhances both.
Price vs. Value
When I shop, I do not just look for the cheapest option. I compare price with what I am actually getting in return. A low-cost swing arm may save money upfront, but if the fitment is poor or the material is weak, it can end up costing more in the long run. I prefer to spend a little more for a product that gives me confidence, durability, and better overall value.
My Final Buying Advice
If I were choosing an extended swing arm for my Honda Grom today, I would focus on fitment, material quality, length, and compatibility with the rest of my setup. I would also think carefully about how I want the bike to ride and look after the upgrade. For me, the best choice is the one that balances performance, safety, and style. When I buy with those priorities in mind, I feel much better about the upgrade and the results it brings.
Final Thoughts
In my view, an extended swing arm for the Honda Grom is one of the best upgrades if you want better stability, improved traction, and a more aggressive stance. I like that it can make the bike feel more planted, especially when riding hard or adding more power. My main takeaway is that this mod is a smart choice for riders who want both performance and style, as long as they choose the right length for their setup.
Author Profile
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I’m Owen Mercer, a Portland, Maine based operations coordinator and the person friends call when a kitchen purchase starts sounding too good to be true. Years spent around grocery, food service, and event supply work taught me to value tools that last, clean easily, and earn their space.
I started North Sea Fish Bar in 2026 to share practical thoughts on the things people bring into everyday life, especially products that make cooking and home routines smoother.
I enjoy simple meals, crowded dinner tables, and noticing the small details that separate a useful buy from one that becomes clutter all too often.
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