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Tiremaxx Service Centers
18.5x8.50-8 trailer tires at Tiremaxx in St. Joseph, MN

Specialty Trailer Tires

18.5x8.50-8 Trailer Tires

What 18.5x8.50-8 means, what else fits the same wheel, and how to get the right load range, from the Tiremaxx tire crew in St. Joseph, MN.

Wheel
8"
Construction
Bias-ply
Section width
8.5"
Overall dia.
18.5"

What 18.5x8.50-8 means

Every number on the sidewall is telling you something. Here's this one, decoded:

  • 18.5Overall diameterThe tire stands about 18.5 inches tall when inflated and unloaded.
  • 8.50Section widthAbout 8.5 inches across the widest part of the tire.
  • –ConstructionBias-ply. The plies run diagonally, which gives a stiff, tough sidewall.
  • 8Wheel diameterFits a 8-inch wheel. This is the number that has to match your rim exactly.

Also written as

The same tire is cross-referenced as 215/60-8. If that's what's on your old tire or your paperwork, you're in the right place.

Size is only half the answer

Two 18.5x8.50-8 tires can be rated for very different weights. Load range (B, C, D, E and up) sets how much each tire can carry at its rated pressure, and on a trailer that number matters as much as the size does. Your trailer's certification label, usually on the front left of the frame, lists the size and load range it was built for. Bring us that label, your paperwork or the old tire and we'll match the load range to what you actually tow.

Commonly used on: small equipment trailers, wide-tread utility trailers.

Other sizes on an 8" wheel

These share your rim diameter. Whether one of them will actually work depends on rim width, load range and fender clearance. Ask us before you switch.

18.5x8.50-8 questions, answered

18.5: The tire stands about 18.5 inches tall when inflated and unloaded. 8.50: About 8.5 inches across the widest part of the tire. –: Bias-ply. The plies run diagonally, which gives a stiff, tough sidewall. 8: Fits a 8-inch wheel. This is the number that has to match your rim exactly. Altogether that works out to roughly 18.5 inches of overall diameter.

Specialty Trailer (ST) tires are built with stiffer sidewalls for towing loads and are rated differently than passenger tires, so they aren't interchangeable just because the numbers look similar. Your trailer's certification label lists the size and load range it was built for. Matching it is what keeps the load capacity you're supposed to have. Bring us the label or the old tire and we'll match it.

We carry 4.80-8, 5.70-8, 16.5x6.50-8 in the same 8-inch wheel diameter. Sharing a rim diameter doesn't guarantee a swap will work, though. Rim width, load range and clearance all have to line up. Call (320) 363-7246 and we'll tell you straight whether a change makes sense.

Yes. 18.5x8.50-8 and 215/60-8 are cross-references for the same tire, written in different notation systems. Trailer and equipment tires are often listed both ways, so don't worry if your paperwork and your sidewall don't look identical.

Stock moves, so the honest answer is to check. Send us the size through the availability request on this page or call (320) 363-7246. We'll tell you what we have on the shelf, what load ranges are available and how fast we can get anything we'd need to order.

← All specialty trailer tire sizes

Pull up to the counter

Need 18.5x8.50-8 on the trailer?

Tell us the size and load range and we'll prepare a no-pressure quote.

Schedule ServiceCall (320) 363-7246