15"x5.5" Tire with 5-on4-1/2" Bolt Patterns and Positive Offset

Updated 10/01/2026 | Published 09/30/2026

Question:

I am looking for trailer tires and wheels. 15 x 5.5 wheels with 5 lug on 4.5 and a positive offset of 16 to 20mm. Do you have any? I need to reduce my trailer width by 2, I have 225/75/15 tires on 15X6 rims with 0 offset.

asked by: Tom D

Expert Reply:

Hey Tom!

We do not have a wheel with the exact dimensions you're looking for. The closest option we have is the Dexstar Conventional Steel Wheel # AM20504. It is a 15" x 6" wheel with the 5 on 4-1/2" bolt pattern you need, and it has a positive offset of 0.5", which works out to about 12.7 mm.

Unfortunately, I wasn't able to find a trailer-rated 15" x 5.5" wheel that has the 16 to 20 mm positive offset you're looking for. Also, with your goal of reducing the trailer's overall width by 2", a 16 to 20 mm offset would only bring the wheels inward by about 1-1/4" to 1-1/2" total. To reduce the overall width by a full 2", you would need roughly 25 mm of positive offset per wheel, assuming the tire width stays the same.

One other thing to keep in mind is that your 225/75R15 tires are typically designed for a 6" wide wheel, so I would stick with a 6" wheel rather than dropping down to a 5.5" rim.

The # AM20504 would move each wheel inward about 1/2", so it would reduce your overall trailer width by approximately 1". If you need the full 2" reduction, we would likely need to look at a different tire/wheel setup or possibly the axle configuration.

What kind of trailer are you working on and what do you haul with it?

expert reply by: Jerry B

Tom D.

9/30/2026

Thanks, I am working on a car trailer. Tandem axle 7000gvwr. If I read correctly this rim just does make the rating needed for the 7000lb trailer, correct? I plan to go to a 205/75/15 tire, load range D. If I get one with the 8"overall width, I should make it. Do you have one that could make up an assembly?

Jerry B.

10/1/2026

@TomD Since you have a tandem axle, yes the # AM20504 will have just enough capacity for you. They're rated at 1,820 lbs per wheel, so 3,640 lbs per axle and 7,280 total for four wheels. For the tire, the # AM10245 would be a good option for you. Using an online calculator tool, I'm showing that the width of a ST205/75R15 tire is 8.1", so it's right on the cusp but I'm assuming (I know, I know) that you were rounding down instead of up. Would the 8.1" work for you?