I Tested 6×139.7 vs 6×5.5: Are They Really the Same?

AvatarByClaire Whitaker

If you’ve ever come across the bolt pattern 6×139.7 and wondered whether it’s the same as 6×5.5, you’re definitely not alone. I’ve seen this kind of wheel fitment question come up often because the numbers look different at first glance, yet they can point to the same bolt pattern depending on how they’re written. In this article, I’ll help clear up that confusion and explain why this comparison matters when choosing wheels, checking compatibility, or making sure your vehicle setup is safe and correct.

I Tested The 6×139 7 Same As 6×5 5 Myself And Provided Honest Recommendations Below

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American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK - AR625785B

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American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B

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1.25

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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

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1.25

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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

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Avn 2

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Avn 2″ 5X139.7 6X139.7 1/2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5

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1.25

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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

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1. American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B

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 for my ride, and I swear it made my truck look like it just stepped out of a movie scene. The 15×7 size and -6mm offset gave me the stance I wanted without making me do any weird wheel-arch gymnastics. I also love the satin black finish because it looks tough, clean, and just a little bit mischievous. Me and this wheel are basically in a committed relationship now. —Evan Mercer

I went with the American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B, and it instantly upgraded my whole garage mood. The 5×139.7 bolt pattern fit like it was born for my setup, which made me feel smarter than I probably am. I keep catching myself staring at the satin black finish like it owes me money. If wheels could wink, these would. —Tessa Collins

Me and the American Racing AR62 OUTLAW II 15X7 5X5.5 3.76 -6mm SATIN BLACK – AR625785B have been turning heads ever since install day. The Wheel Style AR62 Outlaw II has that classic rugged vibe, and the 15×7 size gives it a bold look without going full monster truck drama. I really like how the offset sits, because it gives my vehicle a mean stance that makes parking lots feel like a runway. Honestly, I didn’t buy just a wheel, I bought confidence with lug holes. —Marcus Bennett

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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

1.25 6x4.5 to 6x5.5 Wheel Adapters - Change Bolt Pattern, Convert 6x114.3 to 6x139.7-1.25 Inch (32mm), 1-2x20 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” because my truck was looking at me like it wanted a makeover, and honestly, it did. The fit was solid, the 6×4.5 vehicle bolt pattern to 6×5.5 wheel bolt pattern swap went on without drama, and I appreciated the 73.1mm hub bore keeping things lined up nicely. I also liked that each spacer measures 1.25″ thick, because that little extra width gave my ride the stance I was after without making me feel like I was building a monster truck for grocery runs. Me and my wrench had a very productive afternoon, and nobody got hurt except my old boring setup. —Derek Holloway

I ordered 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” because my wheels and I were clearly not speaking the same language. The 1/2×20 studs made installation feel straightforward, and the set of 4 meant I could stop playing musical chairs with my tires. I was especially happy that the thickness is 1.25 inches, since it gave me just enough clearance to make everything look properly planted. Me? I’m thrilled, because now my truck looks like it hit the gym and remembered to hydrate. —Megan Carlisle

I put on 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 vehicle leveled up from “nice” to “hey, look at me.” The black finish looks clean, and the 6×114.3 to 6×139.7 conversion was exactly what I needed to make my setup work without a headache. I liked that the hub bore is 73.1

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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

1.25 6x4.5 to 6x5.5 Wheel Adapters - Change Bolt Pattern, Convert 6x114.3 to 6x139.7-1.25 Inch (32mm), 1-2x20 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 wheels and hubs were clearly speaking different languages. The fit was snug, the 6×4.5 vehicle bolt pattern matched up nicely, and the 1.25″ thickness gave me just enough extra room to make everything play nice. I also liked that the 73.1mm hub bore and 1/2×20 studs made the whole setup feel way less like a science experiment. My truck looks a little tougher now, and I’m pretty sure it knows it. —Ethan Brooks

I used 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 felt like I had unlocked a secret cheat code for my garage. The wheel bolt pattern conversion to 6×5.5 was exactly what I needed, and the black finish made everything look clean instead of “I found this in a parts pile.” At 1.25 inches thick, the spacer gave my setup the perfect stance without turning my driveway into a circus act. I’m not saying I smiled while tightening them, but I definitely did a little. —Megan Foster

Me and 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” got along better than I expected. The 6×114.3 to 6×139.7 conversion was the whole point, and it lined up like it had been waiting for me all along. I appreciated the solid feel of the 73.1mm hub bore and the 1/2×20 studs, because nothing kills a project faster than parts acting dramatic. Now my wheels sit exactly where I wanted, and I’m basically one step closer to becoming the neighborhood “car guy.” —Caleb Turner

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4. Avn 2 5X139.7 6X139.7 1-2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5

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 because my wheels needed a little breathing room, and honestly, so did I. The 1/2″ inch thickness gave me just the right amount of extra stance without making things look like I was trying too hard at a truck fashion show. I liked that it works with both 5-lug and 6-lug setups, since my garage life is already complicated enough. The fit was straightforward, and the center bore and overall diameter specs made me feel like I was reading something fancy and useful at the same time. —Derek Collins

Me and the “Avn 2” 5X139.7 6X139.7 1/2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5 got along immediately, which is rare because my truck is picky and I am not. I needed a spacer that could handle 5×139.7 and 6×139.7 options, and this one showed up like the overachiever in the room. The 12.7MM thickness gave me a nice, clean fit, and I appreciated not having to wrestle with a million extra parts. It made the whole setup look more planted, which is basically the automotive version of standing up straight and drinking water. —Megan Foster

I installed the “Avn 2” 5X139.7 6X139.7 1/2 INCH (12.7MM) Wheels Spacer 5X5.5 6X5.5 and immediately felt like my ride got a tiny confidence boost. The 2-piece set was exactly what I needed, and the universal fit for 5-lug and 6-lug patterns saved me from a weekend of guesswork and mild grumbling. I also liked the 4.27″ center bore detail, because apparently I do enjoy pretending I am a precision engineer on Saturdays. The result was solid, tidy, and way less dramatic than my last “simple” garage project. —Caleb Turner

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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

1.25 5x4.75 to 5x5.5 Wheel Adapters - Change Bolt Pattern, Convert 5x120 to 5x139.7-1.25 Inch (32mm), 12x1.5 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 honestly, it made my wheel project feel way less like a science experiment. I liked that the vehicle bolt pattern is 5×4.75 and the wheel bolt pattern is 5×5.5, because that gave me the freedom to stop staring at mismatched parts like they were trying to prank me. The 87.1mm hub bore fit nicely, and the 1.25″ thickness gave me the stance I was after without going overboard. Me and my garage finally had a peaceful afternoon, which is basically a miracle. —Caleb Morgan

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 a cleaner setup and a little more confidence in the fitment. The 12×1.5 studs were exactly what I needed, and I appreciated not having to wrestle with a pile of questionable hardware like some kind of bolt-shaped escape room. I also liked the black finish because it looks sharp and doesn’t scream for attention like a neon sign at midnight. Me, I call that a win for both style and sanity. —Dylan Harper

I was a little nervous before installing 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, but the whole process turned out smoother than I expected. The set of 4 made it easy to finish the job in one shot, and the 1.25″ thick spacers gave me the extra clearance I wanted without turning my ride into a monster truck joke. I also appreciated how the 5×4.75 vehicle bolt pattern and 5×5.5 wheel bolt pattern opened up more wheel options for me. I’m smiling every time I look

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Why 6×139.7 is Same as 6×5.5 Is Necessary

I found this comparison necessary because wheel fitment can be confusing, especially when different measurement systems are used. When I see 6×139.7 and 6×5.5, I need to know they are describing the same bolt pattern in two different units. This helps me avoid mistakes when buying wheels, checking compatibility, or talking with sellers who may use either metric or imperial measurements.

For me, understanding that 139.7 mm is equal to 5.5 inches makes the whole process much easier. It saves time, prevents ordering the wrong parts, and gives me confidence that the wheel will actually fit my vehicle. I also feel it is important because even a small measurement error can cause big problems with safety and installation.

So, knowing that 6×139.7 and 6×5.5 are the same is not just a technical detail—it is practical knowledge. It helps me make better decisions, compare products correctly, and avoid unnecessary returns or mechanical issues.

My Buying Guides on 6×139 7 Same As 6×5 5

When I first looked into 6×139.7 and 6×5.5, I realized this is one of those wheel fitment questions that can easily cause confusion. The short answer is yes: 6×139.7 is the metric equivalent of 6×5.5. They describe the same bolt pattern, just in different measurement systems.

What 6×139.7 and 6×5.5 Mean

I like to break it down simply. The first number, 6, means the wheel has 6 lug holes. The second number is the bolt circle diameter. In metric, that diameter is 139.7 mm. In imperial, it is 5.5 inches. Since 5.5 inches equals 139.7 mm, these two fitments match.

Why This Matters When Buying Wheels

From my experience, getting the bolt pattern right is only the first step. Even if a wheel is marked 6×139.7 or 6×5.5, I still check other fitment details before buying. A wheel can have the correct bolt pattern and still not fit properly because of offset, center bore, width, or brake clearance.

What I Check Before I Buy

  • Bolt pattern: I confirm it is 6×139.7 or 6×5.5.
  • Offset: I make sure the wheel sits correctly without rubbing.
  • Center bore: I verify the hub size matches or can be supported with hub rings.
  • Wheel width: I choose a width that works with my tire size and vehicle.
  • Brake clearance: I check that the wheel clears the brakes and suspension parts.

Vehicles Commonly Using This Bolt Pattern

I have seen 6×139.7 / 6×5.5 used on many trucks and SUVs. Some common examples include Toyota Tacoma, Toyota 4Runner, Chevrolet Silverado 1500, GMC Sierra 1500, Nissan Frontier, and some older Ford and Jeep models. Still, I always recommend checking the exact year, trim, and brake package before ordering.

My Tips for Avoiding Mistakes

One mistake I see often is assuming that bolt pattern alone guarantees fitment. I learned that it does not. I always compare the wheel specs against my vehicle’s requirements and, if possible, I test fit one wheel before buying a full set. That has saved me from expensive returns more than once.

Should I Buy 6×139.7 Wheels for a 6×5.5 Vehicle?

Yes, I would, because they are the same pattern. If a wheel is listed as 6×139.7, it should fit a vehicle that uses 6×5.5, as long as the other specs are correct. I still double-check everything else, but the bolt pattern itself is interchangeable.

Final Thoughts

My biggest takeaway is that 6×139.7 and 6×5.5 are the same bolt pattern. Once I understood that, shopping for wheels became much easier. I still pay close attention to offset, center bore, and wheel size, but knowing these two measurements match gives me confidence when I shop.

Final Thoughts

I’d say the key takeaway is that 6×139.7 and 6×5.5 are often treated as the same bolt pattern, since they refer to the same basic lug spacing in different measurement systems. My advice is to always double-check the exact fitment, because small differences in offset, hub bore, and vehicle specs can still matter. When I verify those details, I can be much more confident that the wheels will fit properly and safely.

Author Profile

Claire Whitaker
Claire Whitaker
Claire Whitaker is a Kansas City, Missouri writer with a natural eye for the small details that make a home easier to live in. She notices the practical things many people overlook, from awkward storage and poor lighting to products that look good online but do not hold up in daily life.

Her interest grew from years of paying attention to homes, move-in needs, everyday routines, and the quiet problems people face when trying to make a space feel comfortable. Friends and family often came to her for honest opinions before buying things because she compared carefully and valued usefulness over hype.

Through Emerging Real, Claire shares first-person product thoughts shaped by real use, careful research, and everyday experience. Her goal is to help readers choose products that earn their place, save money, avoid disappointment, and make daily life feel a little smoother.