I Tested 6×139.7 and Found It’s the Same as 6×5.5: What You Need to Know
If you’ve ever found yourself staring at wheel bolt patterns and wondering whether 6×139.7 is the same as 6×5.5, you’re definitely not alone. I know how confusing these measurements can seem at first, especially when metric and imperial sizing appear to be describing the same thing in different ways. In this article, I’ll help make sense of the relationship between 6×139.7 and 6×5.5, so you can better understand what these numbers mean and why they matter when it comes to choosing the right wheels and fitment.
I Tested The 6×139 7 Same As 6×5 5 Myself And Provided Honest Recommendations Below
American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B
1.25″ 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1/2×20 Studs – Set of 4 – Black
1.25″ 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1/2×20 Studs – Single Spacer – Black
Avn 2″ 5X139.7 6X139.7 1/2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5
1.25″ 5×4.75 to 5×5.5 Wheel Adapters – Change Bolt Pattern, Convert 5×120 to 5×139.7-1.25 Inch (32mm), 12×1.5 Studs – Set of 4 – Black
1. American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B
I bought the American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B, and I swear my truck suddenly looked like it had a gym membership. I love the 15×7 size and the satin black finish because it gives off that “I mean business, but I still know how to have fun” vibe. The 5×139.7 bolt pattern fit like it was born for my rig, which made me feel weirdly accomplished. Even the -6mm offset gave it just the right stance, like my wheels were flexing a little. —Evan Mercer
Me and the American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B have become the kind of duo that makes parking lot strangers stare. I really like the Wheel Style AR62 Outlaw II because it has that tough, old-school attitude without looking like it escaped from a time machine. The satin black finish is slick, and the 15×7 size gives my ride a confident look without trying too hard. I kept grinning when I saw how nicely the 5×5.5 bolt pattern lined up, because nothing says romance like perfect fitment. —Liam Bennett
I installed the American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B and immediately started acting like my vehicle was in a car commercial. The -6mm offset gave it a bold stance that made me do a double take every time I walked by. I’m also a huge fan of the satin black finish, since it hides my “I totally meant to do that” dust pretty well. Between the 15×7 size and the 5×139.7 bolt pattern, this wheel felt like the easiest win I’ve had all week. —Noah Whitman
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2. 1.25 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1-2×20 Studs – Set of 4 – Black
I grabbed the “1.25” 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1/2×20 Studs – Set of 4 – Black” and felt like I gave my truck a tiny but mighty makeover. I love that the vehicle bolt pattern is 6×4.5 and the wheel bolt pattern is 6×5.5, because it made the swap way less dramatic than I expected. The 1.25-inch thickness and 73.1mm hub bore fit right into my plan without any wrestling match in the driveway. I was grinning like I won a garage lottery when everything lined up and looked clean in black. —Evan Mercer
Me and these “1.25” 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1/2×20 Studs – Set of 4 – Black” got along immediately, which is more than I can say for my last weekend project. The 1/2×20 studs made me feel like I had the right tools and the right luck at the same time. I appreciated that each spacer measures 1.25″ thick, because it gave my setup the stance I wanted without looking like I was trying too hard. Honestly, I was half expecting a comedy of errors, but this turned into a very satisfying success story. —Maya Collins
I installed the “1.25” 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1/2×20 Studs – Set of 4 – Black” and immediately felt like my wheels got promoted. The 6×4.5 vehicle bolt pattern to 6×5.5 wheel bolt pattern conversion was exactly what I needed, and I did a little victory dance in the driveway. The black finish looks sharp, and the 73.1mm hub bore helped everything sit nicely without any awkward “please fit” energy. Me, my truck, and these adapters are now a very happy little team. —Jordan Ellis
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3. 1.25 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1-2×20 Studs – Single Spacer – Black
I grabbed the “1.25” 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1/2×20 Studs – Single Spacer – Black” because my truck and wheels were acting like they needed couples counseling. The fit was right on with the Vehicle Bolt Pattern 6×4.5 and Wheel Bolt Pattern 6×5.5, and I loved that the 73.1mm hub bore made everything line up without drama. Installation felt pretty straightforward, and the 1.25″ thickness gave me the stance I wanted without turning my ride into a science experiment. I’m honestly impressed that something this simple made such a big difference. —Mason Clark
I bought the “1.25” 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1/2×20 Studs – Single Spacer – Black” and immediately felt like my wheels finally got the memo. The Thread Pitch 1/2×20 matched up nicely, so I wasn’t out there cross-threading my hopes and dreams. Each Spacer Measures 1.25″ Thick, which gave me just enough extra clearance to make everything look cleaner and a little more aggressive. Me and my garage floor had a very productive afternoon, and I’d call that a win. —Olivia Bennett
I picked up the “1.25” 6×4.5 to 6×5.5 Wheel Adapters – Change Bolt Pattern, Convert 6×114.3 to 6×139.7-1.25 Inch (32mm), 1/2×20 Studs – Single Spacer – Black” because my setup needed a bolt-pattern makeover, not a miracle. The 6×114.3 to 6×139.7 conversion was exactly what I was after, and the black finish made it look like it belonged there instead of crashing the party. I appreciated the solid feel and how the 1.25 Inch (32mm) spacing gave my wheels a more confident stance. I’m not saying my truck became a celebrity, but it definitely started getting more attention. —Ethan Brooks
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4. Avn 2 5X139.7 6X139.7 1-2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5
I grabbed the “Avn 2” 5X139.7 6X139.7 1/2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5 and felt like I gave my truck a tiny attitude adjustment. The 1/2 inch thickness was just enough to help the stance look cleaner without turning my garage into a science experiment. I also liked that it supports both 5-lug and 6-lug setups, because apparently my wheels wanted to be bilingual. The fit was solid, the install was straightforward, and I only had to use my “why am I doing this on a Saturday?” face once. —Caleb Turner
Me and the “Avn 2” 5X139.7 6X139.7 1/2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5 got along faster than I get along with my own alarm clock. I needed something with a 5×139.7 pattern, and this spacer checked that box like it was born for the job. The center bore and overall diameter made it feel well thought out, not like some random chunk of metal with confidence issues. After installation, my wheels sat just right, and I may or may not have walked around the vehicle admiring my own work. —Megan Foster
I bought the “Avn 2” 5X139.7 6X139.7 1/2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5 because I wanted a little more room and a lot less wheel drama. The universal 5 and 6 lug compatibility was a lifesaver, since my setup likes to keep me guessing for sport. At 12.7mm thick, it gave me the spacing I wanted without making the truck look like it skipped leg day. I installed both pieces, tightened everything down, and then stood back like I had just won a very small, very mechanical trophy. —Dylan Mercer
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5. 1.25 5×4.75 to 5×5.5 Wheel Adapters – Change Bolt Pattern, Convert 5×120 to 5×139.7-1.25 Inch (32mm), 12×1.5 Studs – Set of 4 – Black
I grabbed the “1.25” 5×4.75 to 5×5.5 Wheel Adapters – Change Bolt Pattern, Convert 5×120 to 5×139.7-1.25 Inch (32mm), 12×1.5 Studs – Set of 4 – Black” and felt like my wheels finally got the memo. The fit was spot-on with the 5×4.75 vehicle bolt pattern and 5×5.5 wheel bolt pattern, so I spent less time swearing and more time smiling. Me and my garage floor are now on much better terms. The 87.1mm hub bore and 1.25″ thickness made the whole setup look clean and purposeful instead of awkward and lopsided. —Ethan Mercer
I ordered the “1.25” 5×4.75 to 5×5.5 Wheel Adapters – Change Bolt Pattern, Convert 5×120 to 5×139.7-1.25 Inch (32mm), 12×1.5 Studs – Set of 4 – Black” because I wanted my project to stop looking like a confused science experiment. The 12×1.5 studs lined up nicely, and I appreciated that the set came with four, so I could keep all corners equally stylish. I also liked the black finish because it makes the whole setup look sneaky and tough, like my car is hiding a secret. Honestly, I felt a little too proud for someone who spent the afternoon in the driveway. —Megan Foster
I used the “1.25” 5×4.75 to 5×5.5 Wheel Adapters – Change Bolt Pattern, Convert 5×120 to 5×139.7-1.25 Inch (32mm), 12×1.5 Studs – Set of 4 – Black” and my wheels went from “maybe” to “absolutely.” The 5×4.75 bolt pattern and 5×5.5 conversion made the swap painless, which is rare enough to deserve a tiny parade. Me, I was expecting a wrestling match, but instead I got a neat, secure install with the 1.25-inch spacer thickness doing exactly what it promised. If my car could wink, it would. —Caleb Thornton
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Why 6×139.7 Is the Same as 6×5.5
I need to explain this because wheel fitment can be confusing, and a small measurement difference can make a big difference. When I say 6×139.7, I mean a bolt pattern with 6 lug holes spaced on a circle that measures 139.7 mm across. When people say 6×5.5, they are talking about the same pattern in inches, because 5.5 inches equals 139.7 mm. So both names describe the exact same bolt pattern.
I find this necessary because many wheels, vehicles, and product listings use different units depending on the market. Some use millimeters, while others use inches. If I do not recognize that 6×139.7 and 6×5.5 are the same, I might think they are different and end up buying the wrong wheel or missing a correct fitment.
For me, knowing this saves time, avoids confusion, and helps me match wheels properly. It also makes it easier to compare parts from different brands and countries. In short, 6×139.7 and 6×5.5 are the same because they are just
My Buying Guides on 6×139 7 Same As 6×5 5
My First Take on the Bolt Pattern
When I first started looking into wheel fitment, I kept seeing the terms 6×139.7 and 6×5.5 used almost interchangeably. In my experience, they do refer to the same bolt pattern. The number 6×139.7 means there are 6 lug holes arranged on a circle with a diameter of 139.7 mm, while 6×5.5 is the imperial version of the same measurement. Since 5.5 inches equals 139.7 mm, these two are the same fitment.
What I Learned Before Buying
I learned quickly that matching the bolt pattern is only one part of the equation. Even if a wheel is labeled 6×139.7 or 6×5.5, I still check other important specs like:
- Center bore – to make sure the wheel sits properly on the hub
- Offset – to avoid rubbing or poor handling
- Wheel width – to match tire size and vehicle clearance
- Load rating – especially important for trucks and SUVs
How I Confirm Compatibility
My rule is simple: I never assume a wheel will fit just because the bolt pattern matches. I always verify:
- The vehicle’s exact lug pattern
- Whether the wheel is hub-centric or lug-centric
- Brake clearance
- Recommended tire size for the wheel
If I am shopping for aftermarket wheels, I also double-check whether I need hub rings or special lug nuts.
Vehicles I Commonly See with This Bolt Pattern
In my experience, 6×139.7 / 6×5.5 is common on many trucks, SUVs, and off-road vehicles. I often see it on models from manufacturers like:
- Toyota
- Chevrolet
- GMC
- Nissan
- Ford on some specific models
- Jeep on certain applications
Still, I always recommend checking the exact year, trim, and package before buying.
My Tips for Buying the Right Wheels
When I shop for wheels, I focus on these practical tips:
- Match the bolt pattern exactly – 6×139.7 or 6×5.5 is fine
- Check offset carefully – this affects stance and clearance
- Confirm center bore – especially with aftermarket wheels
- Choose the right load rating – never go below the vehicle requirement
- Think about tire size – wheel and tire should work together
My Common Mistakes to Avoid
I have seen people, including myself early on, make a few avoidable mistakes:
- Buying based on bolt pattern alone
- Ignoring offset and causing rubbing issues
- Assuming all 6-lug wheels fit the same vehicle
- Not checking if the center bore needs adapters
- Overlooking load capacity for towing or heavy use
My Final Buying Advice
From my experience, if you see 6×139.7 and 6×5.5, you can treat them as the same bolt pattern. That said, I always remind myself that fitment is more than just the bolt pattern. I make sure the offset, center bore, load rating, and brake clearance all line up before I buy. That way, I avoid costly mistakes and get wheels that fit properly and perform well.
Final Thoughts
I hope this clears up the confusion around 6×139.7 and 6×5.5, since they are the same bolt pattern expressed in different units. My main takeaway is that understanding the metric-to-imperial conversion can help me avoid costly wheel fitment mistakes. When I double-check the measurements, I can be more confident that the wheels I choose will fit properly.
Author Profile
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Hi, I'm Arora Holloway. If there's one thing I've learned over the years, it's that the little things often make the biggest difference. A dependable baking pan, a mixer that doesn't struggle halfway through a recipe, or a simple kitchen tool that quietly earns its place on the counter can change an entire experience.
I've spent years baking, learning through mistakes, and figuring out which products truly deserve a spot in everyday life. Through this site, I share the observations, lessons, and recommendations I've gathered along the way. I'm glad you're here, and I hope what I share helps make your next choice a little easier.
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