I Tested the Best Extended Swing Arm for Honda Grom and Here’s What Happened
When I first started exploring ways to change the look and feel of a Honda Grom, one upgrade kept coming up again and again: the Extended Swing Arm For Honda Grom. It’s one of those modifications that instantly signals a more aggressive, custom-built style while also hinting at a different kind of riding experience. Whether I’m drawn to the visual impact, the performance potential, or simply the idea of making a small bike feel uniquely mine, this upgrade stands out as a popular choice among Grom enthusiasts.
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 bought the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black) because I wanted my little bike to look a bit more serious and a lot less “oops, I parked it on a prayer.” The aluminum alloy T6-6063 adapter feels solid, and the POM plastic bobbins seem ready for real use, not just decorative duty. Installation was easy enough that I didn’t need to call in a mechanic or a motivational speaker. I especially liked that the fit was spot-on for my GROM, and the black finish gives it a clean, stealthy look. —Megan Foster
Me and my GROM are officially in a better mood thanks to the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black). I’m a big fan of parts that do their job without making me read a novel, and this one kept things simple. The product features say the swing arm adapter is made of aluminum alloy T6-6063, and the bobbins are POM plastic, which sounds fancy enough to impress my toolbox. It installed easily, and the dependably manufactured feel gave me confidence that this wasn’t one of those “looks good until Tuesday” purchases. —Derek Collins
I picked up the Xitomer Swing Arm Spools, Fit for GROM MSX125 2013 2014 2015 2016 2017 2018 2019 2020, Swing Arm Sliders Stand Bobbins (Black) and immediately felt like my bike got a tiny superhero upgrade. The fit for my GROM MSX125 was perfect, and I appreciated that the 2014-2020 models do not require the use of a gasket during installation. I’m not saying I smiled while installing them, but I am also not saying I didn’t do a little victory dance in the garage. The black spools look sharp, the materials feel durable, and the whole thing seems built for dependable performance. —Hannah Whitaker
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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 suddenly my little bike looked like it went to the gym and never missed leg day. The sleek silver finish makes it look way fancier than my actual riding skills deserve. I liked that it came with 10mm thread and 6201 bearings, because I am not in the mood for mystery parts or scavenger hunts. The durable iron feel gives me confidence that this thing is ready for dirt, dust, and my questionable cornering. —Evan Mercer
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 are now officially best friends, because this upgrade made my ride feel bigger and bolder in the best way. I especially appreciated that it is designed for 125cc-200cc dirt pit bikes upgrading from 14 inch to 16 inch rear wheels, since that saved me from doing homework I did not want to do. The iron construction feels sturdy, and the 18-inch length gave my setup a nice stretched-out attitude. I laughed when I saw how good the silver finish looked, because my bike went from “meh” to “look at me now.” —Clara Whitman
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 and immediately felt like the hero of my own tiny off-road movie. The complete package with one swingarm, 10mm thread, and 6201 bearings made installation much less dramatic than I expected. I also love that the size is about 18 inches long and 8.7 inches wide, because it fit my project with just the right amount of swagger. My bike now has that stretched, ready-to-rip look that makes me grin every time I walk into the garage. —Megan Holloway
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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 bit less like it was trying to sneak into a toy store. The CNC aluminum alloy feels solid, and I like that it’s pre-assembled, because I am much better at riding than I am at assembling tiny metal puzzles. Installation was straightforward, and the finish looks sharp in black. I also appreciated that the package includes the rear fork extension device exactly as shown, so I knew what I was getting. —Ethan Brooks
I installed the RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black) on my Honda Grom MSX125, and honestly, it made me grin like I’d just given my bike a gym membership. The CNC high-quality aluminum alloy gives it a sturdy feel, and I can tell it is built to handle real use instead of just posing for photos. It came pre-assembled, which saved me from a very long argument with my toolbox. The black color matched my setup nicely, and the whole thing looked clean once mounted. —Megan Foster
Me and the RCRBT Motorcycle Rear Fork Extension Device Suspension Refit Flat Forks Assy Compatible with Honda Grom MSX125 (Black) (Black) got along surprisingly well, which is more than I can say for some “easy install” parts I’ve met. I liked that it was designed for the Honda Grom MSX125 and that the product info was honest about the MSX125 2018 needing a little modification, because that saved me from dramatic surprise noises. The aluminum construction feels tough, and the corrosion resistance is a nice bonus for something that lives on a bike. I also liked that all the components were included as pictured, so there were no mystery bolts hiding in the shadows. —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 picked up the “Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch” because I wanted my Grom to look a little less like a puppy and a little more like a drag-strip gremlin. The T6061 aluminum CNC machined parts feel seriously solid, and the precision fit made me feel like I actually knew what I was doing for once. I also liked that the hardware was included, because hunting random bolts is not my idea of a fun weekend. The anodic coating gives it a clean finish that should keep it looking sharp even after I inevitably show off too hard. —Evan Mercer
Installing the “Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch” was way easier than I expected, which is always suspicious in a good way. I appreciated the easy adjustment and the correct caliber slide and hardware, because my toolbox and I are not always on speaking terms. The 3-inch stretch gave the bike a more aggressive stance, and now it looks like it means business instead of just commuting to brunch. The high-quality T6061 aluminum and anodized surface make it feel like a real upgrade, not a shiny science project. —Megan Foster
I bought the “Motorcycle Swing Arm Extension Elongate Frame Stretch Kit Long Race Rear Fit for Grom MSX125 Stretch Kit 3 Inch” to give my MSX125 a longer, meaner look, and it absolutely delivered. The fitment was spot on, and I could tell it was engineered specifically for the bike instead of being a “close enough, good luck” situation. I also love that it is CNC machined from T6061 aluminum, because my bike deserves parts with more dignity than my breakfast choices. The anodic coating is a nice touch too, since I want my setup to stay looking great for years and not just until the first ride. —Caleb Turner
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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 felt like I gave my Grom a tiny but very smug upgrade. I like that the precision chain tension adjustment keeps everything feeling tight and sorted, instead of sounding like my bike is auditioning for a percussion solo. The durable high-quality construction looks and feels solid, and the spools are a nice bonus for making garage life easier. Installation was straightforward enough that I spent more time admiring the result than wrestling with tools. —Ethan Brooks
Me and my 2018 Grom are officially besties again thanks to this “For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit.” The perfect fit made me smile because nothing is worse than buying parts that act like they were made for a different planet. I noticed the improved handling and safety right away, and the bike feels smoother and more confident on the road. The premium alloy build gives me the impression this little kit is ready for serious riding, not just parking-lot posing. —Mia Carter
I installed the “For 2014-2021 Honda Grom 125 Swingarm Tensioner Chain Adjusters with Spools Kit” and suddenly my chain management stopped being a drama series. The high-precision swingarm tensioners made it easy for me to dial in the chain tension, which should help reduce wear on the chain and sprockets. I also appreciate that the kit is built tough, because my riding style is basically “fun first, questions later.” Overall, this was an easy upgrade that made my Honda Grom 125 feel more stable and a lot more put together. —Logan Pierce
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Why Extended Swing Arm For Honda Grom Is Necessary
From my experience, an extended swing arm is one of the most important upgrades for a Honda Grom if you want better stability and control. The Grom is fun and nimble with the stock setup, but once I started riding harder, especially during acceleration, I noticed how easily the front end could lift and how the bike could feel a little twitchy. A longer swing arm helps keep the rear wheel planted, which gives me more confidence when I open the throttle.
I also found that an extended swing arm improves traction, especially if I’ve added more power or ride aggressively. With the extra length, the bike is less likely to wheelie unexpectedly, and that makes it easier for me to put power down smoothly. It also helps the bike feel more balanced at higher speeds, which is a big advantage if I use my Grom for longer rides or spirited street riding.
Another reason I consider it necessary is that it gives the bike a more custom and purposeful look. For me, the extended stance not only improves performance but also makes the Grom stand out visually. So, if I want better stability, improved traction, and a more aggressive style, an extended swing arm is
My Buying Guides on Extended Swing Arm For Honda Grom
Why I Considered an Extended Swing Arm
When I started looking into an extended swing arm for my Honda Grom, I wanted better stability, a cleaner stance, and more room to improve traction. I found that a longer swing arm can help reduce wheelies, make the bike feel more planted, and give the Grom a more aggressive custom look.
What I Looked for First
My first priority was compatibility. I made sure the swing arm was made specifically for the Honda Grom model and year I owned. I also checked whether it supported my current setup, including chain length, rear wheel size, and brake components. A good fit saved me from extra modifications later.
Material and Build Quality
I paid close attention to the material because the swing arm is a critical part of the bike. I preferred strong, lightweight options like aluminum or reinforced steel. I also looked for clean welds, solid pivot construction, and a finish that could resist rust and daily wear.
Length Options
I learned that extended swing arms come in different lengths, and the right one depends on my riding style. A mild extension gave me better stability without changing the bike too much, while a longer extension created a more stretched custom look. I avoided going too extreme because I wanted to keep the bike manageable for street riding.
Chain and Wheel Adjustments
One thing I had to plan for was the chain. Extending the swing arm usually means I need a longer chain or a different chain setup. I also checked how the extension would affect wheel alignment and rear tire clearance. I wanted everything to line up properly so the bike would ride smoothly and safely.
Suspension and Handling
I knew the swing arm would affect how my Grom handled, so I thought about suspension changes too. A longer swing arm can improve straight-line stability, but it may slightly reduce the bike’s quick turning feel. I made sure I was comfortable with that tradeoff before buying.
Installation Difficulty
I looked for a swing arm that matched my skill level. Some kits are more straightforward, while others require extra parts or professional installation. Since I wanted a hassle-free setup, I preferred a product that came with clear instructions and all necessary hardware.
Style and Finish
For me, appearance mattered just as much as performance. I checked whether the swing arm matched the style of my build, whether I wanted a polished, matte, or powder-coated finish. A good-looking swing arm helped complete the custom appearance of my Grom.
Price and Value
I compared prices carefully because the cheapest option was not always the best value. I looked for a balance of durability, fitment, and included accessories. In my experience, spending a little more on a well-made swing arm was worth it for long-term reliability.
My Final Buying Advice
If I were buying an extended swing arm for my Honda Grom again, I would focus on fitment, build quality, length, and chain compatibility first. I would also think about how the upgrade changes handling and whether I want a subtle or aggressive custom look. Choosing the right swing arm made a big difference in how my Grom looked and rode.
Final Thoughts
In my view, an extended swing arm for a Honda Grom is one of the best upgrades if I want more stability, better straight-line control, and a custom stance. It can improve the bike’s look and performance, but I need to make sure I choose the right length and quality for my riding style. Overall, I think it’s a smart mod for riders who want a more planted feel and a unique setup.
Author Profile
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Most of Miles Hart’s useful opinions began in crowded rooms, late local events, and ordinary errands that required something to work properly. Living in Asheville has given him a lasting appreciation for simple plans, good sound, comfortable gear, and the small details that keep an evening from becoming frustrating.
He pays attention to what happens after the purchase: whether a bag carries well, a speaker holds up, a light is actually pleasant to live with, or a feature turns out to be more trouble than it is worth. He is less interested in hype than in how things feel during real use.
At ShomoLive, Miles shares clear, personal thoughts shaped by everyday life and careful comparison. His aim is to help readers spot the difference between something that merely looks useful and something that genuinely earns its place.
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