tire questions....

[Rose Mary]

Hi group
Have spent some hours the last few days talking to tire shops. Les
Schwab and Commercial Tire

Have 6 good toyos (only a couple years and less old) but they are
rated G. I've known since last year I needed to replace the steer
tires with a heavier rated tire. The duals I plan to run out some time
on....
Michelin 12 R 22.5 ZX2 had been recommended but have been out of stock
each time I inquire.
All the 11 r 22.5 seem to be underrated, the highest at 13200...still
not enough to have much leeway.
Today talking with commercial about a Yokohama 12 R 22.5 for a good
rating.
My question is -
there is + .5 difference in the overall height of the tire, compared
to what I am currently running (11R 22.5 Toyo) -will this difference
in pitch cause a problem with the driveline
(vibration, possible damage??). Wouldn't be an issue I reckon if I
were replacing all 6 tires but that isn't happening.....

Not looking for cheap, looking for right and safe, after this bird
experiencing 3 steer blowouts in the heat the past few years...the
last with me at the wheel. We've been lucky to have kept it on the
blacktop upright and no other vehicles got involved.

Equal to use or not to use, that is another question.....

Thanks
Rose Mary
82 FC 35
JP's White Bird