Tires

[MCI-RICK]

The vin/info tag in the bus says the original tire on my bus was 12.5x22.5

I read, in a related thread, the 315/80R 22.5 is close to 12.5x22.5

I now have Goodyear G391E  295/80R22.5

Anyone know of a calculator for 22.5 tires?   I'd like to know height and revs per mile on both sizes?

Rick

[JackConrad]

Rick,
  Weight carrying limitations and tire RPM will vary not only by manufacturer, but by model.  You can go each manufacturer's website to mfind the information.  Jack

[DaveG]

315/80R22.5 490 revs per mile, static loaded radius 19.9, overall diameter 42.4 in

295/80R22.5 503 revs per mile, static loaded radius 19.3, overall diameter 41.3 in

[TomC]

You can go to the Goodyear, Michelin, Bridgestone commercial tire web sites and pull that kind of information.  I switched from 12R-22.5 to 11R-24.5-mainly since this was the tires that were on my big rig truck, and I was driving at the time.  The idea was to be able to bury the cost of new tires of the bus in the cost of the truck-but quit driving before I could take advantage of that.  I still have the 11R-24.5's since they are 476rpm tires, and also have them on my KW Truck that I am converting.  Good Luck, TomC

[MCI-RICK]

Thanks for the info everyone!   

Maybe I'm not imputing the right search info but I haven't found a site that'll give height/diameter.  I've been using a calculator, Dallas shared in the chat room, to determine engine speed & mph and it requires tire height/diameter. 

My tires will need replacing in the not too distant future and there are many factors I'm considering.  I don't think I want to do new wheels and tires at this point.  Although I also want to increase highway speed and tire size makes a difference.

The 315/80R 22.5 seems like the way to go.  I understand it's the max size I could go with?  If that's not correct, please let me know.  I'll be the first to say I don't know.   

Rick

 

[ol713]

Hi;
    If I rember right, the 12.75x22.5  was a leased tire used by
    Greyhhound.  The tire of choice is 12rx22.5 for our MCI.
    I now have 315/80x22.5 tires on the front.  (new)  and
    12rx22.5 used tires every where else.
    This the route I have used,  your route may vary.
               
                                         Good luck
                                                  Merle.

[MCI-RICK]

Merle,

How do you like the 315/80x22.5 tires?  What brand did you use?

Rick