Speed Rating of AM30140 5.70-8 Trailer Tire/Wheel

Updated 07/02/2020 | Published 06/30/2020

Question:

What speed is this tire rated for?

asked by: Charles L

Expert Reply:

The Kenda 5.70-8 tire you'd looked at, part # AM30140 has a maximum speed rating of 65 mph. If you were looking for something with a higher speed rating, you'll need to increase the wheel diameter up to a 12 inch wheel. The Taskmaster 4.80R12 tire # TA98RR on a 5 on 4-1/2 inch bolt pattern wheel is about 2-2/3 inches larger in diameter than the 5.70-8 inch tire you'd asked about. The tire/wheel has an 81 mph speed rating.

Going with the larger size would move the tire about 1-1/3 inches closer to the underside of the tire or wheel well, and you'll want to see an absolute minimum of 3 inches of clearance there when the trailer is under load. If you'll have less, you'll need to move the fenders upward.

expert reply by: Mike L