Mixing 12R22.5 and 275/80R22.5 Tires?

[DoubleEagle]

Any of you guys old enough to remember when a tire was warrantied for the life of the tread dates had nothing to do with if the tire blew they measured the tread deducted a amount and gave you a new tire no matter how old the tire was

I sure am, and I remember cotton cord plies that could go 100 miles an hour in the fifties, of course they were kind of lumpy afterwards. The point of all these time limits (for tires or mattresses) is to stir up sales by scaring people that something bad will happen to them if they don't pony up and spend some bucks. Even young tires can blow suddenly. As far as mattresses go, if you keep it too long, a metal spring can pop up and poke you, but the mattress ads imply that the mattress will get heavy from all the dead skin and bed bugs that will accumulate in eight years. If you don't get good sleep at night while on the road, you might go off it when you nod off, and you blame the accident on a tire blowout. There is your risk of using an old mattress, and an innocent tire gets blamed. 

[kyle4501]

As I see it, age has a bigger affect on the steel belted radials. Not so much for the bias ply tires.

Rubber may be water proof, but it isn't moisture proof - the steel belts can rust. I'm sure it isn't much of an issue in dry climates.

The bond between the rubber and the steel cords in the tire is not as durable as rubber & textile cords.

It is this hidden failure that causes my concern, especially since the unexpected tire failures I have experienced were all tires over 6 years old.


(Having a steer tire blow out at speed may influence your opinion on tire replacement intervals . . . )

[luvrbus]

Tire construction today amazes me, I had a blowout on my pickup and dropped the spare which has never touched the ground and the thing was separated at the tread so I sit till Coachnet sent a service truck with a new tire

[kyle4501]

Tire construction today amazes me, I had a blowout on my pickup and dropped the spare which has never touched the ground and the thing was separated at the tread so I sit till Coachnet sent a service truck with a new tire

Yes, the rubber they use today ain't the same as it used to be.

I remember the first radials Dad got. Firestone 721s - they lasted over 40,000 miles. The most mileage he had gotten out of the bias ply tires was 20,000.

[Oonrahnjay]

Yes, the rubber they use today ain't the same as it used to be.

I remember the first radials Dad got. Firestone 721s - they lasted over 40,000 miles. The most mileage he had gotten out of the bias ply tires was 20,000.

      In 1973, I bought a long-wheel-base Dodge MaxiVan.  It came with bias tires which lasted about 20K on the front axle.  My dad's cousin owned a tire shop just down the street and he swore that he would never ride on any other tire than Michelin radials.  He suggested an oversize Michelin truck radial ("throw the rear tires away, they might have a little tread on them but you'll love the radials" - he was right).  I drove those tires for almost 10 years, an alignment problem caused one front to be worn unevenly at 90K (110K on the odometer) so I replaced both fronts and put the "good" used tire on the spare.  About 15K later, I put a new pair on the rear axles.  I lent that truck to my nephew in 1998 with those 14 and 12 year old tires on it and he drove it for about two years until he burnt up the engine.
      I never really loaded those tires on that van.  It was the days of the "oil crisis" speed limits (55 MPH) and I rarely carried more than two people and a couple of racing motorcycles,  but to have two tires go 90K miles and the other pair of the set go 105K miles made me a Michelin believer.  I got 100K miles out of the "Energie" tires on my first TDI; when a drunk totalled it, I bought a second TDI that had a mixture of mis-sized Japanese and Korean tires on it.  ASAP, I got those off and have replaced them with Michelins every 90K miles for the 320K miles I've owned the second one.  But Michelins on the TDIs haven't been trouble-free -- I got a broken piece of a little spring or circlip (about the size of a pencil lead and an inch long) in one and it had to be plugged when the speedo read about 350K miles ... that's all.
     With bus tires running 12-14 or more plies and carrying tons of weight with the rubber that's made today,  I'm going to spend the $$ it takes to replace at 7 years.  I'm not saying that everybody should but that will be my choice.

[luvrbus]

Times have  changed when I was younger your local service station (a thing of the past) was your local tire and battery shop.
I always ran Altas tires because the station always had the tires in stock wrap in paper.Times have changed and the American consumer set on their @$# and let the manufactures tell them what they needed like it not this is what you buy.My rant for today     

[Dave5Cs]

Clifford was the paper to protect the wooden spokes?

[plyonsMC9]

For the 8 new drive tires on my bus, I deviated from Michelin and bought Hankook. I figure that Freightliner has them as a standard tire offering, they can't be that bad. Plus almost $2,000 cheaper. The tires that were on the truck were 19 years old (truck has sat). Because I used Never Seize on all inner and outer wheel nuts, none locked up-all 80 came off and on without problem. Good Luck, TomC

Same - here - very good experience w/ Hankooks on the bus.  MUCH less expen$ive and heard the truckers liked 'em.  Works for me.   

Kind Regards, Phil

[Branderson]

I too have Hankooks and Toyo for the front.

[daddysgirl]

Any of you guys old enough to remember when a tire was warrantied for the life of the tread dates had nothing to do with if the tire blew they measured the tread deducted a amount and gave you a new tire no matter how old the tire was

I'm 46...and I remember that.
We've all had tire discussions before, and opinions are varied. I've got 12R/22.5 now. Before I'm finished, the bus gets new tires...they are splitting on the walls.
I think I want to use the 315 80R 22.5. Those will fit on 8.5 Alcoas...right?

IMHO and FWIW...Maybe I should find that blowout video for the newbies. Not because they don't know, or to be offensive, but many people might not know that what you should do in an emergency isn't what most people think (have power in reserve...lightly accelerate to gain control...)

[Zephod]

I'm 46...and I remember that.
We've all had tire discussions before, and opinions are varied. I've got 12R/22.5 now. Before I'm finished, the bus gets new tires...they are splitting on the walls.
I think I want to use the 315 80R 22.5. Those will fit on 8.5 Alcoas...right?

IMHO and FWIW...Maybe I should find that blowout video for the newbies. Not because they don't know, or to be offensive, but many people might not know that what you should do in an emergency isn't what most people think (have power in reserve...lightly accelerate to gain control...)

Yes. Down on the accelerator to regain control with a front puncture then steady braking once it's under control. Never hold the steering wheel with your thumbs inside as it could whip and break them, making it harder to control the bus. With a rear puncture, the back will shimmy. Off the accelerator and slow gradually using the footbrake.


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[TomC]

315/80R-22.5 is rated for a 9" wide rim. It may be used on a 8.25" rim with a reduction (like 10%) in weight carrying capability. Good Luck, TomC