Recommended Tire Size for Upgrading Tires From 7.00-15LT on My Horse Trailer
Published 12/22/2015 >
Question:
my 1988 tandem axle sundowner 4 horse trailer had 7.00-15lt tires and was told the st 205-90d-15 tire is the replacement for it. yes or no ?
asked by: Jeff
Expert Reply:
Good news, I can help you find a tire for your Sundown Horse Trailer.
The 205/90-15 is a close tire size to the 7.00-15. The closest size to a 7.00x15 tire that we offer would be a 225/75-15. One 225/75-15 tire that could work for you is the Kenda # AM10303, this tire would be slightly shorter and a little wider than your 7.00-15 tire.
Something to keep in mind is that a 7.00-15 tire typically fits 15 x 5-1/2 inch wheel. The ST225/75R15 tire size will fit on 15 inch diameter rims that are 6, 6-1/2, or 7 inches wide. They will not fit on rims narrower than 6 inches. I recommend checking the width of your rims to determine if the new tires will fit. Another thing to note when moving to a different tire size is fender and frame clearance.
A 7.00-15 tire will be about 8 inches wide and have an overall diameter of about 29 inches. The overall diameter of a 225/75-15 tire is about 28 inches and it will be about 9 inches wide. This means the new tires will sit about 1/2 inch closer to the inside of your fender or trailer frame. I recommend measuring the space you have available to make sure a wider tire will fit.
I linked a few Help Articles on trailer tire sizes for your convenience.

Product Page this Question was Asked From
Karrier ST225/75R15 Radial Trailer Tire - Load Range E
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range E
- 225/75-15
- 15 Inch
- M - 81 mph
- Kenda
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Q&A: Closest Metric Replacement Tire Size for 7.00-15 Tire on Livestock Trailer
- Search Results: 225~75~15
- Shop: Strider ST205/75R15 Radial Trailer Tire w/ 15" Revolver Silver Mod Wheel - 5 on 4-1/2 - LR D
- Shop: Trailer Wiring
- Shop: Lippert SolidStep 4.0 RV Steps for 26" Wide Doorways - 4 Steps
- Search Results: 5/8 inch studs
- Search Results: 5/8 inch studs trailer brakes
- Search Results: complete flat towing systems
- Search Results: vehicle tow bar brake system
- Search Results: flat tow
- Shop: Trailer Hitch
- Article: Trailer Tire Sizing
- Q&A: Best Option For Replacing Dometic Duo-Therm On 2001 Dynamax Isata Touring Sedan Motorhome
- Shop: Provider ST225/75R15 Radial Trailer Tire - Load Range E
- Shop: Vehicle Tow Bar Wiring
- Shop: Dexstar Conventional Steel Wheel w/ +0.5" Offset - 16" x 6" Rim - 8 on 6-1/2 - Black
- Search Results: advent air distribution box
- Shop: Base Plate for Tow Bar
- Q&A: Recommended Replacement for 7.00-15LT Tires
- Shop: Front Mount Hitch
- Q&A: How to Set Up a 2017 GMC 1500 Sierra for Flat Towing Behind an RV
- Shop: Vehicle Tow Bar Brake System
- Article: Roadmaster Vehicle Specific Base Plates
- Shop: Blue Ox Avail Non-Binding Tow Bar - RV Mount - 2" Hitch - 10,000 lbs
- Shop: Blue Ox Base Plate Kit - Fixed Arms
- Shop: Replacement Quick Disconnect Crossbar Assembly for Roadmaster Tow Bars
- Shop: Brake Controller
- Video: Flair-It PEX Bypass Valve Fitting Review
- Video: Review of Advent Air RV Air Conditioners - 13500 BTU White RV AC - ADV96SR
- Article: How (and Where) to Connect an RV Propane Grill