PT 40, 42 & 43 owners. A ? about your tire size

[Stephen Birtles]

Kurt is not reinventing the wheel Just trying to find the proper size


Stephen 77fc35



--- In WanderlodgeForum@yahoogroups.com, "Gregory OConnor"
wrote:
>
> Kurt, proverbialy you always try and reinvent the wheel, now you
> crossed the line. Stay with 12's.
>
> steer tires on many commercial rigs are different than drive tires
> (tag and power axle). I stick with the 12R's because the actual size
> seem closer MFG to MFG and they are easier to find than metric (I
> think Sears started metric just to sell 2 sets and an extra
> drawer).
>
> If you set up a rotation purchase of tires you can always have new
> tires on the steer. I like to drop new upfront because I think slow
> turning and stationary turning on hot asphalt can cause ply
> adhersion/seperation issues. Regroovable tires always seem to be
> built for the market that puts the tires to the test so I try and
> find regroovables (but have never had them grooved). I always
> feared that the comfort ride claims of Mitch' tire design have
> compramised the build but that may just be a way for me to justify
> not paying the extra 100 per the tire Mitch charge.
>
> If you want my opinion, you have 8 good tires now. I would not add
> more than 2 per the year. new upfront, the old front to one side of
> the drive axle or the other side or split them up on the tags. This
> would leave you with only the choice for 12's. no need to rotate the
> tires around the back and height is not an issue from side to side
> because the differential knows not to spin both sides the same.
> Some think tire size overworks the diff ans screws with the ring
> gear, I think it is worked by bad shocks or uneven roads. --- In
> WanderlodgeForum@yahoogroups.com, "Kurt Horvath"
> wrote:
> >
> > After a 2 hour web search I can not find anybody that makes a tire
> in
> > 315 75R 22.5.
> > Everybody has a 315 80R 22.5 they are about 1" wider than a 12R
> 22.5
> > & 11.3" Vs 12.5" in width, and the 315's are a little
> shorter,19.6"
> > Vs 19.8" loaded radius, overall diameter is the same @ 42.4", they
> > both use 9" rims, the 315's have a 1700lbs single wheel higher
> > capacity and a 1465lbs higher dual wheel capacity, per tire.
> > The only thing I see as a problem may be the dual wheel spacing.
> > 13.2" for the 12R and 14.1" for the 315's. The only other
> difference
> > is revolutions per mile, I'd say insignificant @ 2 RP Mile. Info
> from
> > B.F.Goodrich. The only chart I could find without bouncing all
> over
> > the web
> > I've seen several size tires on comparable birds PT 40,42,& 43's,
> > I've seen coaches with 11R 22.5, and the coach for sale on e-bay
> > states it has 315's on it..
> > Convention wisdom states all tires should be of the same size &
> Mfg.
> > I would like to have the heavier tires on the steer axles. I don't
> > think 1/2 inch wider on each side of the tire in the front wheel
> > wells would make a difference, though it is already a tight fit.,
> and
> > I'm not sure if the larger tires would have an adverse effect on
> the
> > overall drive ability. I'm hoping for better control , higher
> > capacity and the added safety in a more capable tire.
> > Any thoughts?
> >
> > Kurt Horvath
> > 95 PT-42
> > 10AC
> >
>