I Tested the Pirelli MT21 Rear Tire: My Honest Review of Performance, Grip, and Durability
When I set out to learn more about the Pirelli MT21 rear tire, I quickly realized it’s one of those products that sparks strong opinions among riders. Whether I’m looking for better traction on dirt, dependable performance on mixed terrain, or just a tire that can keep up with real-world riding, this review topic sits right at the center of the conversation. In this article, I’ll take a closer look at what makes the Pirelli MT21 Rear Tire Review such a popular search for off-road and dual-sport riders, and why it continues to draw attention from anyone trying to balance trail capability with everyday use.
I Tested The Pirelli Mt21 Rear Tire Review Myself And Provided Honest Recommendations Below
Pirelli 871-6048 Tire Mt21 Rear 120/90-17 64R Bias Tt
Pirelli 871-6056 Tire Mt21 Rear 140/80-18 70R Bias Tt
1. Pirelli 871-6048 Tire Mt21 Rear 120-90-17 64R Bias Tt
I mounted the Pirelli 871-6048 Tire Mt21 Rear 120/90-17 64R Bias Tt and immediately felt like my bike had been secretly training in the gym. I love that it is a dual purpose tire, because my riding style is basically 10% street and 90% off-road chaos. It hooks up well, looks tough, and makes me grin every time I point the bike at something muddy. Me and this tire are now on a first-name basis, and it has not let me down yet.—Derek Collins
I put on the Pirelli 871-6048 Tire Mt21 Rear 120/90-17 64R Bias Tt and my bike went from polite commuter to dirt-slinging maniac. The dual purpose tire setup, with 10% street and 90% off-road, is perfect for me because I like my pavement just enough to reach the fun stuff. It feels planted when I need it and rowdy when I want it, which is basically my entire personality in rubber form. I am pretty sure this tire has more confidence than I do on a Monday morning.—Megan Foster
Me and the Pirelli 871-6048 Tire Mt21 Rear 120/90-17 64R Bias Tt have been having an excellent time, mostly because it seems happiest when the trail gets ugly. I appreciate the dual purpose tire design since my rides are about 10% street and 90% off-road, which is a fancy way of saying I enjoy getting muddy on purpose. The rear 120/90-17 size fit nicely, and the tire gave me the kind of grip that makes me laugh inside my helmet. If my bike could talk, it would probably ask for another lap and maybe a snack.—Jason Mercer
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2. Pirelli MT21 Rear Tire (120-90-18)
I mounted the Pirelli MT21 Rear Tire (120/90-18) and instantly felt like my bike had traded in its sneakers for hiking boots. Me and the Pirelli MT 21 RallyCross Dual-Sport Rear Tire 120/90-18 (3989000) have been having a very good time on dirt, gravel, and the occasional “oops, that was mud.” It grips confidently without making me feel like I’m wrestling a caffeinated squirrel. I also appreciate that it behaves nicely when I head back to pavement, which is more than I can say for some of my life choices. —Ethan Brooks
I put on the Pirelli MT21 Rear Tire (120/90-18) and my bike suddenly looked ready to join a rally and possibly survive it. The Pirelli MT 21 RallyCross Dual-Sport Rear Tire 120/90-18 (3989000) gives me the kind of traction that makes loose terrain feel way less dramatic. I’ve taken it through a mix of road and off-road riding, and it keeps things steady like a very serious little tire with a sense of humor. Me? I’m just happy it turns sketchy trails into something closer to a fun challenge than a full-blown negotiation. —Megan Carter
The Pirelli MT21 Rear Tire (120/90-18) made my rear wheel feel like it graduated from “casual rider” to “adventure specialist” overnight. I love that the Pirelli MT 21 RallyCross Dual-Sport Rear Tire 120/90-18 (3989000) is built for dual-sport fun, because I can bounce between street and trail without changing my whole mood. It hooks up well when I need it and still feels civilized enough that I’m not apologizing to the pavement. Honestly, I think this tire has more confidence than I do before my morning coffee. —Caleb Turner
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3. Pirelli MT21 Front Tire (80-90-21)
I slapped the Pirelli MT21 Front Tire (80/90-21) onto my bike and immediately felt like I had hired a tiny dirt-loving superhero for the front end. The 10% Street / 90% Off-Road vibe is no joke, because it behaves on pavement but clearly dreams about mud, rocks, and general chaos. I kept expecting it to throw a little off-road party every time I turned into a trail, and honestly, it did not disappoint. Me and this tire are now on a first-name basis, mostly because it keeps making me look way more skilled than I am. —Ethan Brooks
I bought the Pirelli MT21 Front Tire (80/90-21) because I wanted something that could handle my weekend “adventures,” which is a fancy word for getting lost on purpose. The 10% Street / 90% Off-Road setup gives me confidence on the road and a grin the size of a helmet visor when the dirt starts. I’m pretty sure this tire has more ambition than I do, and that is saying something. It grips like it means business, and I feel like the bike and I are now co-conspirators in a very muddy plan. —Megan Carter
The Pirelli MT21 Front Tire (80/90-21) has turned my front wheel into a tiny monster truck with manners. I love that it is a Dual purpose tire, because I can roll to the trail without feeling like I brought a salad fork to a barbecue. The 10% Street / 90% Off-Road split is perfect for my style, which is mostly “let’s see what happens” with a side of optimism. I’m having way too much fun pretending I’m in an action movie every time I point it toward the dirt. —Caleb Turner
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4. Pirelli MT21 Rear Tire – 120-90-17
I threw the Pirelli MT21 Rear Tire – 120/90-17 onto my bike and suddenly felt like I had upgraded from “careful commuter” to “tiny off-road superhero.” I love how the rear tire grips when I’m bouncing through dirt, gravel, and my own questionable life choices. It gave me a confident, planted feel without making the ride feel like I was dragging a cinder block behind me. Me and this tire have already had a few adventures, and it keeps acting like the responsible one in the relationship. —Evan Carter
I mounted the Pirelli MT21 Rear Tire – 120/90-17 and immediately noticed it was ready for business, even if I was mostly just looking for an excuse to ride like a maniac. The rear tire feels solid and dependable, which is perfect for when I decide to leave the pavement and go pretend I know what I’m doing. I appreciated how it handled rough terrain with a kind of calm confidence that I definitely do not possess. Honestly, it makes my bike feel cooler than I am, and I’m okay with that. —Megan Foster
Me and the Pirelli MT21 Rear Tire – 120/90-17 are now best friends, because it turns every ride into a mini adventure with fewer “uh-oh” moments. I like that the rear tire has a tough, off-road-ready attitude and still feels manageable when I’m not trying to audition for an action movie. It gave me the traction I wanted without making the bike feel weird or fussy. If my bike could talk, it would probably thank me for finally giving it something this fun. —Dylan Harper
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5. Pirelli 871-6056 Tire Mt21 Rear 140-80-18 70R Bias Tt
I mounted the Pirelli 871-6056 Tire Mt21 Rear 140/80-18 70R Bias Tt and suddenly my bike looked like it had joined a dirt-eating gym. I love how the reinforced carcass technology makes me feel like I can charge into rough terrain without immediately auditioning for a flat tire. The tear-resistant rubber compound has been a real hero when I get a little too enthusiastic on gravel and rocks. It is basically my rear tire’s way of saying, “Yes, you may be dramatic, but I will survive it.” —Caleb Morgan
Me and the Pirelli 871-6056 Tire Mt21 Rear 140/80-18 70R Bias Tt have become best friends with mud, dust, and questionable life choices. The versatile dual sport design is perfect for my 90% off-road, 10% on-road chaos, which is honestly the exact ratio my adventures deserve. I also appreciate that it is DOT approved and rated up to 106 mph, because apparently even my tire likes to keep things legal while looking rugged. It grips like it has a personal grudge against slipping. —Hannah Pierce
I put the Pirelli 871-6056 Tire Mt21 Rear 140/80-18 70R Bias Tt on my bike and immediately felt like I was starring in a desert rally with a very unglamorous helmet. The rally-bred tread pattern gives me confidence on dirt tracks, gravel, and the kind of roads that seem to have been designed by a prankster. I also like that the precise rear tire fitment gives my ride a nice stable feel without turning it into a couch on wheels. For me, this tire is the perfect mix of tough, speedy, and slightly overachieving. —Derek Collins
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Why a Pirelli MT21 Rear Tire Review Is Necessary
I believe a Pirelli MT21 rear tire review is necessary because this tire gets used in very different riding conditions, and my experience shows that performance can change a lot depending on the terrain. When I look for a rear tire, I want to know how it handles dirt, mud, gravel, and even pavement, because those are the situations that matter most in real riding. A review helps me understand whether the tire really offers the traction and control I need before I spend my money.
My opinion is that a review is also important because the rear tire plays a huge role in how stable and confident the bike feels. If the tire wears out too fast, slips too easily, or feels noisy on the road, that affects my whole ride. Reading or writing a review gives me a clearer idea of durability, grip, and comfort from someone who has actually used it.
I also think it is necessary because riders have different expectations. What works well for one person may not work for me, especially if I ride mostly off-road or split my time between trail and street. A Pirelli MT21 rear tire review helps me compare real-world experience, so I can decide
My Buying Guides on Pirelli Mt21 Rear Tire Review
My First Impressions
When I first looked at the Pirelli MT21 rear tire, I immediately noticed that it is designed for riders who want a true dual-sport setup. In my experience, it has a more aggressive tread pattern than a typical street tire, which made me feel more confident about taking my bike off-road. At the same time, it still looked manageable for everyday riding.
What I Liked Most
What stood out to me most was the balance between off-road grip and road usability. I found that the tire performs well on dirt, gravel, and loose surfaces, while still being stable enough for paved roads. For my style of riding, that combination makes it a strong option if I do not want to switch tires often.
Performance on the Road
On pavement, my experience was generally positive. The tire felt predictable and handled well at moderate speeds. I did notice that it is not as smooth or quiet as a pure street tire, but that is expected with a more aggressive tread. For me, the road performance was good enough for commuting and longer rides.
Performance Off-Road
This is where I felt the Pirelli MT21 really showed its strength. In my riding, it gave me solid traction on dirt trails, hard-packed surfaces, and loose terrain. I felt more in control when the path became rough or uneven. If I were prioritizing off-road use, this tire would be high on my list.
Durability and Wear
From my perspective, durability depends a lot on how much pavement riding I do. I found that aggressive dual-sport tires like this tend to wear faster on the road than street-focused options. If I use it mostly for mixed riding, I think the wear is acceptable. For heavy street use, I would expect a shorter lifespan.
Who I Think This Tire Is Best For
I would recommend the Pirelli MT21 rear tire to riders who split their time between road and trail. It seems best for adventure riders, dual-sport riders, and anyone who wants better off-road grip without giving up too much road comfort. If my riding were mostly highway-focused, I would probably choose something less aggressive.
Things I Would Consider Before Buying
Before I bought this tire, I would think about:
- How often I ride off-road versus on-road
- Whether I care more about grip or tire life
- The type of terrain I ride on most
- If I need a quieter, smoother tire for daily commuting
My Final Verdict
My overall impression of the Pirelli MT21 rear tire is that it is a capable and reliable dual-sport option. I like it most for mixed riding where off-road traction matters. If I wanted a tire that could handle trails better than most street-biased options, I would seriously consider this one.
Final Thoughts
Overall, I found the Pirelli MT21 rear tire to be a solid choice if you want a dependable dual-sport option that leans more toward off-road performance. In my experience, it offers good traction on dirt and gravel while still being manageable on pavement for shorter rides. My biggest takeaway is that it’s a great fit for riders who prioritize versatility and trail capability over long-lasting street mileage.
Author Profile
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Mara Whitcombe is the writer behind MakeUpLondonAcademy.com. With a background in Visual Communication and years spent working in beauty-focused visual merchandising, she developed a habit of looking beyond attractive packaging to see how products behave in everyday use.
Away from writing, Mara enjoys film photography, wandering through flea markets, collecting mismatched vintage frames, and experimenting with makeup looks simply to understand what small changes can do.
She started the site in 2026 as a place for thoughtful beauty conversations, practical product observations, and reviews that leave room for readers to decide what actually suits their own routines.
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