Which Tires Are The Right Size For 1970 Single Axle Airstream Trailer

Updated 06/30/2014 | Published 06/27/2014

Products Featured in This Question

Karrier ST205/75R15 KR03 Radial Trailer Tire - Load Range D

(2339)

$120.92

Karrier ST225/75R15 Radial Trailer Tire with 15" White Wheel - 6 on 5-1/2 - Load Range D

(1573)

$198.88

Karrier ST225/75R15 Radial Trailer Tire with 15" Galvanized Wheel - 6 on 5-1/2 - Load Range D

(2449)

$267.64

Question:

hello ... i have purchased a 1970 single axle 23ft airstream safari with new tires and wheels 6 bolt .... the tires are Commodore ST205/75R15 .... my concern is that they state weight at about 1820lbs .... the dry weight of the trailer is apprx 3400lbs ...... did someone sell the previous owner the wrong tires as this rig will probably be low 4000lb when loaded ..... thanks for you help ....roy

asked by: Roy M

Expert Reply:

You will want to check your Airstream axle out and make sure it has the weight capacity of 4,000 lbs as you mentioned. The capacity should be on a plate or sticker on the axle, or you could use the VIN and call the manufacturer for that information.

If you find that the axle has a higher weight capacity than the 3640 lbs your tires provide, you may wish to replace the tires with a load range D tire like the Karrier ST205/75R15 Radial Trailer Tire, part # AM10245. This tire has a maximum load rating of 2,150 lbs at 65 psi. This tire will fit 15 x 5, 15 x 5-1/2, 15 x 6, and 15 x 6-1/2 rims, and has a 6 ply rating.

If you wish to replace the tire and wheel, and find that you have a 6 on 5-1/2 bolt pattern, I recommend part # AM32664, which is the Karrier ST225/75R15 Radial Trailer Tire with 15 inch White Wheel, or part # AM32666, which is the same tire mounted on a galvanized wheel. Both of these tires have a capacity of 2,540 lbs at 65 psi.

Simply upgrading the tires will not increase the load capacity of your axle.

expert reply by: Jeffrey L