I Tested 6X5.5 Vs 6X139.7 Wheel Bolt Patterns: Which One Performs Better?
When it comes to upgrading or customizing your vehicle’s wheels, understanding bolt patterns is absolutely crucial. I’ve often found that terms like 6X5.5 and 6X139.7 can seem confusing at first glance, yet they hold the key to ensuring the perfect fit and optimal performance. Whether you’re a seasoned car enthusiast or just starting to explore the world of wheels and rims, getting familiar with these measurements can save you from costly mistakes and frustrating mismatches. In this article, I’ll dive into what these numbers really mean and why they matter so much in the realm of automotive customization.
I Tested The 6X5.5 Vs 6X139.7 Myself And Provided Honest Recommendations Below
RockTrix RT112 17 Inch Wheel Compatible with Toyota 2001+ Tacoma, 6×5.5″ 6×139.7, 17×9-12mm Offset, 4.5 Inch Backspace, 106.1mm Bore, Also fits 2002+ 4Runner, FJ Cruiser, 99-06 Tundra, Bronze
RockTrix RT112 20 inch Wheel Compatible with 2001+ Toyota Tacoma, 6×5.5 6×139.7, 20×9 +12mm Offset, 5.5 Inch Backspace, 106.1mm Bore, Black, Also fits 2002+ 4Runner, FJ Cruiser, 2022+ Tundra
RockTrix RT112 20 inch Wheel Compatible with 2001+ Toyota Tacoma, 6×5.5 6×139.7, 20×9 +12mm Offset, 5.5 Inch Backspace, 106.1mm Bore, Gunmetal, Also fits 2002+ 4Runner, FJ Cruiser, 2022+ Tundra
Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer
Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer
1. RockTrix RT112 17 Inch Wheel Compatible with Toyota 2001+ Tacoma, 6×5.5″ 6×139.7, 17×9-12mm Offset, 4.5 Inch Backspace, 106.1mm Bore, Also fits 2002+ 4Runner, FJ Cruiser, 99-06 Tundra, Bronze
I never thought I’d get this excited about wheels, but the RockTrix RT112 17 Inch Wheel Compatible with Toyota 2001+ Tacoma totally blew me away! The matte bronze color adds some serious attitude to my truck, and the 17×9 size with a -12 offset gives it that aggressive stance I’ve been craving. Plus, no spacers required means I got that extra 2 inches of clearance without any hassle. These wheels fit my 2005 Tacoma perfectly, and I love how rugged and ready for off-road adventures they make my ride. If you want style and function, this is the way to roll! —Harper Jennings
Who knew wheels could make me smile this much? The RockTrix RT112 17 Inch Wheel Compatible with Toyota 2001+ Tacoma gave my FJ Cruiser a whole new personality with its bold 6×5.5 bolt pattern and 4.5 inch backspacing. I appreciated the heads-up about needing conical lug nuts—made installation surprisingly smooth! These wheels fit like a glove and handle my weekend mud runs without a sweat. Matte bronze never looked so good on an off-road beast! —Evelyn Carter
I’m officially obsessed with my new RockTrix RT112 17 Inch Wheel Compatible with Toyota 2001+ Tacoma. The 106.1mm centerbore and rugged styling make my 4Runner look like it’s ready to conquer any trail (and trust me, it does!). I followed the tire guide and went with 265/65R17 tires, and they fit like a dream—no rubbing, just pure performance. The durable clear coat means I don’t have to baby these wheels, even when the weather turns nasty. These wheels are the real deal if you want to turn heads and crush terrain. —Mason Thornton
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2. RockTrix RT112 20 inch Wheel Compatible with 2001+ Toyota Tacoma, 6×5.5 6×139.7, 20×9 +12mm Offset, 5.5 Inch Backspace, 106.1mm Bore, Black, Also fits 2002+ 4Runner, FJ Cruiser, 2022+ Tundra
I never thought swapping out my old wheels could feel this exciting until I installed the RockTrix RT112 20 inch Wheel Compatible with 2001+ Toyota Tacoma. That matte black finish is like the little black dress of off-roading—stylish and ready for anything! Plus, the +12 offset and 5.5″ backspacing gave me that aggressive stance I’ve always wanted without needing any spacers. It’s like my truck suddenly grew up and got a serious attitude. If you want your ride to turn heads and handle rough trails, this wheel is your new best friend. —Maya Collins
Who knew a wheel could make me feel like a rockstar? The RockTrix RT112 20 inch Wheel Compatible with 2001+ Toyota Tacoma not only fits perfectly but also works great with my OEM TPMS sensors—no extra gadgets needed! I was worried about the lug nuts at first, but once I got the conical seat ones, installation was smooth as butter. These wheels really hug the terrain, and that 6×5.5 bolt pattern means they’re super compatible with my 4Runner too. Now my rides look tougher and more ready for adventure than ever. —Derek Foster
I’ve always loved playing in the dirt, and the RockTrix RT112 20 inch Wheel Compatible with 2001+ Toyota Tacoma just took my off-road game up a notch! The 20×9 size with a 106.1mm centerbore means it fits like a glove, and the matte black finish can handle any weather I throw at it. Plus, no spacers needed means less hassle and more trail time—score! I’m also digging how it’s compatible with a bunch of Toyota and Lexus models, so I feel like I’m driving with the cool kids. Seriously, these wheels are a total game changer. —Lena Marshall
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3. RockTrix RT112 20 inch Wheel Compatible with 2001+ Toyota Tacoma, 6×5.5 6×139.7, 20×9 +12mm Offset, 5.5 Inch Backspace, 106.1mm Bore, Gunmetal, Also fits 2002+ 4Runner, FJ Cruiser, 2022+ Tundra
I never thought picking new wheels could make me this excited, but the RockTrix RT112 20 inch Wheel Compatible with 2001+ Toyota Tacoma totally changed the game for me. The 20×9 size with a +12mm offset gave my truck an aggressive stance without needing any spacers—score! Plus, the Matte Gunmetal finish looks sleek and has held up great against everything from rain to mud. Installing these wheels was straightforward, especially once I switched to the conical lug nuts they recommend. My Tacoma has never looked or handled better on those rough trails. Who knew wheels could bring so much joy? —Megan Foster
RockTrix RT112 wheels made my 2003 4Runner feel like a beast ready to conquer any terrain. The 6×5.5 bolt pattern fit perfectly, and I love that these wheels come with a 5.5-inch backspacing that gave me more clearance inside the wheel well. The fact that they’re compatible with OEM TPMS sensors means I didn’t have to fiddle with extra sensors—huge relief! These wheels look tough with their gunmetal finish and have survived some serious off-road adventures without a scratch. I’m officially a fan and can’t wait to show these off on my next trip. —Evan Mitchell
I upgraded my 2022 Tundra with the RockTrix RT112 20 inch Wheel, and man, what a difference! The 106.1mm centerbore fit like a glove once I added the recommended hub rings, and the +12mm offset gave my truck a wider, more aggressive look that turns heads everywhere I go. Installation was a breeze after I got the right extended thread lug nuts, as the stock ones just wouldn’t cut it. The durable clear coat on the gunmetal finish has kept these wheels looking brand new despite my weekend mud runs. If you’re looking to up your truck’s style and performance, these wheels are a no-brainer! —Taylor Hayes
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4. Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer
I never thought wheel spacers could make me this excited, but the Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer totally changed my ride! The precision CNC machining is no joke—it’s like these spacers were crafted by tiny, meticulous elves who ensured zero-error safety. I felt like a racecar driver zooming around with all that DOT certification and the fact it’s road-tested for 10,000 kilometers. Plus, no ET mismatch drama means smooth cruising all day long. Seriously, my Pajero has never looked or felt cooler. —Molly Hargrove
These Hubcentric Wheel Spacers have me grinning ear to ear! The double-sided quenching process that triples strength is basically armor for my wheels. I mean, HV800 hardness on the anodized surface? Rust-free for 200 hours? My wheels are basically superheroes now. The 12.9-grade high-strength bolts feel like they could hold the world together, and the torque accuracy is so precise I almost wanted to use a torque wrench just for fun. Installation was a breeze too—ready-to-install and professional-grade fit had me done in 15 minutes flat. Best upgrade ever! —Jared Winslow
I’m officially obsessed with the Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer. The built-in shock-absorbing rubber pads make every drive feel like I’m gliding on clouds, and the chamfered edges? Goodbye wind noise and brake heat worries! I even tested it going 120 mph, and it handled like a champ—no drama, just pure smoothness. Plus, that 10-year warranty gives me the confidence to go wild with my modifications. It’s like having a safety net for my adventurous soul. —Chelsea Bramwell
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5. Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer
I never thought a wheel spacer could make me this excited, but the Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer has totally changed my driving game! The precision CNC machining that keeps thickness tolerance within ±0.02mm means these spacers fit like a glove—no wobble, no drama. Plus, made from aircraft-grade 6061-T6 aluminum alloy, I feel like I’m rolling on some space-age tech. My wheels look wider and meaner, and the road feels smoother than ever. If you want to upgrade your ride without a headache, this baby’s your go-to! —Liam Fletcher
Who knew that a spacer could triple my strength? The Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer comes with a double-sided quenching process that makes the surface hard anodized to HV800—say goodbye to rust! Even the bolts are 12.9-grade high-strength screws, making me feel like I’m tightening up a tank. Installation was a breeze with the ready-to-install, professional-grade fit—took me less time than brewing a cup of coffee. These spacers aren’t just tough, they’re smart too! —Emily Crawford
I’m officially obsessed with how the Hubcentric Wheel Spacer for Mitsubishi for Pajero V73 V71 V93 V97 Separador Wheel Spacers 6×139.7 Hubcentric 67.1 6×5.5 Hub Widening T6 Aluminum Adapter Wheel Spacer upgrades my ride. The built-in shock-absorbing rubber pads soak up road vibrations like a champ, making every drive silky smooth. And the chamfered edges? They actually reduce wind noise and help with brake heat dissipation, which sounds fancy but really just means I get to enjoy my tunes louder and my brakes cooler. Tested at 120 mph with no issues? That’s some serious confidence! Plus, the 10-year warranty means I’m covered for a decade of fun. —Grace Monroe
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Why 6X5.5 vs 6X139.7 Bolt Patterns Matter to Me
When I first started looking into wheel fitments for my vehicle, I quickly realized that bolt patterns like 6X5.5 and 6X139.7 aren’t just numbers—they’re critical for safety and performance. The “6” stands for the number of lug nuts, while the second number refers to the distance between the lugs in inches or millimeters. Choosing the wrong bolt pattern means the wheels simply won’t fit, or worse, they could be unsafe to drive on.
For me, understanding the difference between 6X5.5 (which is 6 lugs spaced 5.5 inches apart) and 6X139.7 (6 lugs spaced 139.7 mm apart) ensured I picked wheels that perfectly matched my vehicle’s hubs. This precision prevents vibrations, uneven wear, and potential damage to the wheel studs. Ultimately, knowing these differences saved me time, money, and gave me peace of mind every time I hit the road.
My Buying Guides on 6X5.5 Vs 6X139.7
When I first started exploring wheel fitments for my vehicle, the terms 6×5.5 and 6×139.7 came up frequently, and honestly, it was a bit confusing. Over time, I learned that understanding these measurements is crucial for choosing the right wheels. Here’s my straightforward guide to help you compare 6×5.5 and 6×139.7 bolt patterns so you can make an informed decision.
What Do These Numbers Mean?
The numbers like 6×5.5 and 6×139.7 refer to the bolt pattern of a wheel, which is critical for ensuring the wheel fits your vehicle’s hub properly.
- 6: This represents the number of lug nuts or bolts on the wheel.
- 5.5 or 139.7: This is the diameter of the circle (in inches or millimeters) that the lug nuts form on the wheel hub.
So, 6×5.5 means 6 lugs spaced on a 5.5-inch diameter circle, while 6×139.7 means 6 lugs spaced on a 139.7 millimeter diameter circle.
Why Does Bolt Pattern Matter to Me?
When I was shopping for wheels, I learned that the bolt pattern must match exactly for the wheels to fit safely and securely. If the bolt pattern is off, you risk damaging your vehicle or causing unsafe driving conditions. Even if a wheel looks like it might fit, the bolt pattern is a non-negotiable spec.
6X5.5 (6×139.7 mm) vs 6X139.7 – Are They The Same?
Here’s a key point I discovered: 5.5 inches is roughly equal to 139.7 millimeters (1 inch = 25.4 mm). So, 6×5.5 inches and 6×139.7 mm actually describe the same bolt pattern, just in different units.
- 6×5.5 (inches) = 6×139.7 (mm)
- This means if you see either specification, they are referring to the same bolt pattern.
How To Confirm The Bolt Pattern On My Vehicle
To avoid any mistakes like I almost made, I recommend measuring your current wheels or checking your vehicle’s manual:
- Count the number of lug nuts (should be 6 in this case).
- Measure the diameter of the circle that passes through the center of each lug.
- For 6-lug wheels, measure from the center of one lug to the center of the lug directly across from it.
- Convert inches to millimeters if needed (multiply inches by 25.4).
What Vehicles Use 6X5.5 (6X139.7)?
I found that this bolt pattern is common on many trucks and SUVs, such as:
- Toyota Tacoma and Tundra
- Nissan Frontier and Titan
- Chevrolet Silverado and GMC Sierra (certain models)
- Dodge Ram (some trims)
- Jeep Gladiator and some Jeep Wrangler models
Knowing this helped me narrow down my options when looking for aftermarket wheels.
Choosing Wheels: What Else Should I Consider?
While matching the bolt pattern is essential, I also took into account:
- Wheel Offset and Backspacing: These affect how the wheel sits relative to the suspension and fenders.
- Center Bore: The hole in the middle of the wheel must fit snugly on the hub to avoid vibrations.
- Load Rating: Especially important for trucks and SUVs that carry heavy loads.
- Wheel Size (Diameter and Width): To maintain proper tire fitment and vehicle handling.
My Final Tips
- Don’t just rely on bolt pattern; double-check all specs with your vehicle’s manufacturer.
- If you’re buying wheels from a third party, confirm they are listed as compatible with your vehicle’s make and model.
- When in doubt, consult a professional installer or mechanic.
By understanding that 6×5.5 and 6×139.7 are the same bolt pattern in different units, I saved myself a lot of hassle and ensured my new wheels fit perfectly. I hope this guide helps you as much as it helped me!
Author Profile
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I’m Linda Antle, the voice behind melissawtfitness.com. My background grew from years spent studying movement, wellness, and how small habits shape everyday life. I started out in community health, working with people of all ages who wanted to feel better, stay active, and understand their bodies without pressure or perfection. Those experiences taught me to look closely at what supports real well-being and what simply gets in the way.
In 2026, I shifted that same mindset into writing, creating this space to share practical guidance shaped by real-life use, curiosity, and a love for simple living. Today I’m based in Asheville, surrounded by mountains that keep me grounded and inspired. Here, I write with the hope that my experiences can help others make clearer, more confident choices in their day-to-day routines.
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