Tires

Joe-

The front axle on a spread axle trailer experiences a tremendous amount of scrub when cornering the trailer as it often acts as a pivot point for the trailer. There are three factors that impact the scrub effect on a tire in this position: tread depth, shoulder design, and the amount of spread.

Having a shallow tread depth minimizes the amount of lateral force and stress transferred to the shoulder and will prolong the tire life.

Selecting an open shoulder design or a shoulder design with stress relieving sipes will also minimize the amount of shoulder that is "grabbed" by the road and folded under during sharp radius turns.

Reducing the spread between axles will minimize the scrubbing effect. A 60" spread will be more damaging to your tires than a 48" spread.

The new tires best suited for this design are the Dunlop SP181A and the Goodyear G314 trail tires both available in the size you are looking for.

Goodyear has specifically designed a retread for the spread axle position called the G319SA (SA=Spread Axle)if you already have good casings You may want to consider this option.

The spread axle trail position is extremely demanding on a tire and no tire is perfectly designed to withstand this amount of scrub, but selecting the right tread depth and shoulder design will help you go farther.

RPMs can be found in the technical literature for any tire manufacturers. See www.goodyear.com/truck for a complete listing.

In goodyears literature I see

11R22.5 = 504 RPM
11R24.5 = 481 RPM

295/75R22.5 = 517
295/75R24.5 = 503

Typically this is caused by a mechanical failure such as a locked brake or leaking axle fluid on the brake drum etc...

Of course their are others but those are the top two that come to mind.

No it is not standard practice to rotate trail tires. Mostly because the costs associated with a rotation maintenance program for trail tires does not compensate for any potential savings. There is limited savings to be had with such a program because if the correct tire is selected for the application then even tire wear is expected negating the need for tire rotation.

There are many more factors that dictate the average tire price. Simply stating that the tire is intended for a 387 Peterbilt does not provide enough information to give a fair answer.

Variables like tire size, intended use, wheel position, use of retreads, wide base or low profile design and tire manufacturer will all cause wide swings in tire prices.

A cheap retreaded trail tire could go for less than $100 whereas a widebased 445/65R225 will reach upwards of $500 or more. Your best bet is to contact your local tire dealer who can get you a realistic price range for your unique needs.