Tire Question...12R22.5

[John]

Thanks Neil, and everyone else that posted...That was very
informative. I had to go by the place I usually get my commercial
tires today and they're looking for me some 12Rs. I Should hear
something about what they can get for me by tomorrow evening or Monday
morning. He thought the Michilens would be around $425 plus mounting
etc. He said he would also check to see what else was available in
that size range. I'll let everyone know what they find out.

Thanks again,
John

--- In WanderlodgeForum@yahoogroups.com, "Neil & Pat" wrote:
>
> Hi John, you have already received several answers to your inquiry;
however,
> I thought that I would add a few additional thoughts. I believe
that what
> you are thinking of doing would not only be ill advised but may be
downright
> dangerous. From my years as a tire engineer and with A' Weigh We Go
> weighing coaches including many Bluebirds (my own PT-36 included) I have
> knowledge that most all late 90s Birds are very close to their
maximum GVWR
> or GAWR as delivered and many are over that critical (and legally
> enforceable) limit when operated.
>
> For that reason based on the lessor ability to carry a load the 11R
tires
> are in no way suitable for use on your 98 LX. The actual load
capability
> for the 12R and 11R are #6610/7390 & #6780/6005 (single/dual)
respectively,
> thus, you can see that there is a major reduction in the tires carrying
> capacity, probably less that your coach requires. On the slim
chance that
> your specific coach might be unusually light where the 11R could
carry the
> weight it will require an increase in tire pressure to do so,
something that
> most RVers hate to do because of the ride quality reduction that
accompanies
> higher tire pressures. In addition there is a approximately a .75"
radius
> reduction (affecting your computers and dash readouts) along with a .80"
> reduction in tread width with a corresponding reduction in tire
footprint
> area (which will increase wear, decrease steering power and decrease
> stopping power); finally while your current rims will probably be OK
to use
> they are not optimal for the 11R (9:00 vs. 8:25) a fact which will also
> compromise somewhat the total tire performance
>
> Do not listen to those who are not unbiased experts in just what
tires are
> required for RV usage. Remember also that RV are the only vehicle
on the
> road that "operates at 100% of its capability 100% of the tire."
Tires are
> no place to compromise; there are some very important people on
board your
> coach. Do the right thing and have your coach weighed properly,
> wheel-by-wheel as is done by the RVSEF, only then will you be able
to make
> sound judgments re: tires, pressures, etc. If you have any other
questions
> or if I have misread your original question please do not hesitate
to ask
> additional questions.
>
> Regards,
>
> Neil LeKander
> Author "The RVer's Ultimate Survival Guide"
> author@...
>
> -----Original Message-----
> From: WanderlodgeForum@yahoogroups.com
> [mailto:WanderlodgeForum@yahoogroups.com]On Behalf Of John
> Sent: Wednesday, October 11, 2006 6:44 PM
> To: WanderlodgeForum@yahoogroups.com
> Subject: [WanderlodgeForum] Tire Question...12R22.5
>
> I have started looking for new tires for our coach as it has the
> origional tires on it. While they are showing no cracking at all, I am
> still concerned about their age and would like to start swapping them
> out before I have to do it from the side of the road. The current
> tires are 12R22.5 which seems to be a lot more uncommon than
> 11R22.5s(which I run on my dump truck). From talking to a couple tire
> people they say the 11R22.5 are a little smaller(shorter). Has anyone
> switched from the 12s to the 11s? Any recomendations on a particular
> brand?
>
> Thanks,
> John Cassel
> 98 Wanderlodge LX
>
>
>
> [Non-text portions of this message have been removed]
>