Converting Tire Size For Bias-Ply Tire To Metric
Updated 05/03/2017 | Published 05/01/2017
Question:
What is the conversion of boat trailer tire 5.30 X 12 bias to radial metric? What are the benifits from switching from bias to radial on my boat trailer tires. My single axle boat trailer carries less than 1000 lbs. Thanks
asked by: Denny R
Expert Reply:
The number 5.30 on your tire is the section width of the tire which means the tire is 5.3 inches wide.
For a comparable radial tire for your boat trailer you can use a tire like part # AM10130. This tire measures 5.7-inches wide. The # AM10130 tire is what I recommend if you switch to a radial tire for your boat trailer. You can calculate the size of the tire width by multiplying the first number of a radial tire by .03937. In this case, the # AM10130 is and ST145/R12. Multiply (145 x .03937). I have attached links to a couple of helpful articles that explains the difference between bias-ply and radial tires and how to measure tires.
A radial tire will run cooler than a bias-ply tire because it has more flex and that gives it better traction and stability. A bias-ply tire has stiffer sidewalls which works better for off-road use.
Product Page this Question was Asked From
Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range D
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range D
- 145/80-12
- 12 Inch
- M - 81 mph
- Kenda
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Search Results: 580 x 12 tire
- Shop: Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E
- Shop: Coil SumoSprings Custom Helper Springs for Coil Spring Suspension - Rear Axle
- Shop: Suspension Enhancement
- Shop: Trailer Hitch
- Shop: Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range D
- Shop: Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" White Spoke Wheel - 5 on 4-1/2 - LR D
- Q&A: Will The Taskmaster Steel 8-Spoke Trailer Wheel # TA49RR Allow For ST145/R12 Radial Trailer Tire?
- Q&A: Does a 5.30x12 Trailer Tire and ST145/R12 Trailer Tire Use the Same Size Wheel
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Q&A: Recommended Replacement Axle for Harbor Freight Folding Trailer 62671
- Q&A: Recommendation for Upgrading to Larger Tires from 5.30-12 Tires on Trailer
- Q&A: Axle Replacement 1720 Harbor Freight Trailer
- Q&A: Should I Replace the U-bolts When Replacing the Leaf Springs
- Q&A: Upgrading Harbor Freight Trailer Tires 5.3 X 12", 5 on 4-1/2" Lug Wheels
- Shop: Karrier ST175/80R13 Radial Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D
- Article: Trailer Wiring Diagrams
- Search Results: trailer hitch
- Video: Firestone Ride-Rite Air Bags with Easy Mount Compressor Feature Breakdown
- Search Results: trailer wiring
- Shop: Trailer Wiring
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: One Year Later | Firestone Airide Helper Springs and Heavy Duty Air Compressor
- Article: How to Measure for Trailer Hitch Drop
- Search Results: trailer tires and wheels
- Shop: Brake Controller
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: trailer jack
- Shop: Base Plate for Tow Bar
on Trailer Tires and Wheels
