How to properly buy 15x6jj rims

[GON]

Want to buy replacement rims for a horse trailer. Featherlite is the trailer manufacturer, and the VIN sticker states "15x6jj". Tire size is ST225/75R 15(C), note I run Ds instead if Cs.

Doing an Amazon search, not confident in what rim to select.

Any suggestions on selecting the correct rim?

A chatgpt subscription search returned the following:
A 15x6JJ rim specification breaks down like this:

• 15 = wheel diameter in inches
• 6 = wheel width in inches
• JJ = flange/bead seat profile shape used for the tire bead

The “JJ” designation is common on many passenger vehicles, SUVs, trailers, and light trucks. It refers to the contour of the wheel lip where the tire seals against the rim.
Typical specs you’ll often see on a 15x6JJ wheel include:

Specification	Typical Value
Rim Diameter	15 in
Rim Width	6 in
Bead Seat Profile	JJ
Offset	Usually 0 to +45 mm depending on vehicle
Bolt Pattern	Varies by application
Center Bore	Vehicle-specific
Construction	Steel or aluminum
Tire Width Compatibility	Commonly 185–225 mm tires

Examples from real 15x6JJ wheels:

• Trailer wheel example:
  • 5x4.5 bolt pattern
  • 0 mm offset
  • 3.5 in backspacing
  • 2150 lb load capacity
• Heavy-duty trailer wheel example:
  • 6 on 5.5 bolt pattern
  • 0 offset
  • 2860 lb load capacity

Common tire sizes that fit 15x6JJ rims include:

• 195/65R15
• 205/65R15
• 205/70R15
• 215/75R15
• 225/75R15 (application dependent)

 

[GaryMX5]

You have the basic size. Offset will be found on the back of the wheel usually with the letters "ET" before a number. You should try to stick with the same offset when possible but varying by a few mm's is not usually an issue. Places like Tirerack, Discount tire and even Walmart sell quality trailer wheels (and tires). It's great to try to save a few bucks by searching around but getting dependable service is just as important.

 

[AdmiralYoda]

You need a generic steel wheel. My first thought would be to go to summitracing.com and go to the tires/wheels section. You can filter on wheel diameter (15), width (6), bolt pattern (???) and backspacing. Sort from low-to-high price.

You can search on the google machine to determine if you have a 5x4.5", 5x5" or 5x5.5" bolt pattern and how to measure the backspacing if you can not find the stamping on the back.

Here is an example of what is at the cheaper end of the list. 15x6, 5x4.5" bolt pattern, 3.5" backspace. $69
https://www.summitracing.com/parts/ale-2756012-s

 

[BHopkins]

You have the basic size. Offset will be found on the back of the wheel usually with the letters "ET" before a number. You should try to stick with the same offset when possible but varying by a few mm's is not usually an issue. Places like Tirerack, Discount tire and even Walmart sell quality trailer wheels (and tires). It's great to try to save a few bucks by searching around but getting dependable service is just as important.

As long as the tires don't rub the trailer or fender, does offset even matter for this application? It doesn't look like there are any brakes on the axles. From what I understand, trailer wheels usually have 0 offset, but if GON checks to make sure there is enough inside clearance, would it matter if it had an inch or more of positive offset?

 

[The_Jeff]

Have you looked at farm stores like Tractor Supply? This is their bread and butter.

 

[GaryMX5]

As long as the tires don't rub the trailer or fender, does offset even matter for this application? It doesn't look like there are any brakes on the axles. From what I understand, trailer wheels usually have 0 offset, but if GON checks to make sure there is enough inside clearance, would it matter if it had an inch or more of positive offset?

Gon's photo showed a tandem axle. My concern is whether differing offsets (mixing wheels of differing offset on the same side) might impact tracking, handling, etc. I assume he's replacing all four but if he intends to use an existing wheel (spare?) it might be an issue. As you mentioned, most of the time offset is not a big deal as long as there's adequate clearance. There are, however, those absurd instances where way too much positive camber can stress hubs, bearings, etc.

 

[AZjeff]

It doesn't look like there are any brakes on the axles.

No chance a 2 axle horse trailer does not have brakes.