Bus Conversions dot Com Bulletin Board
November 24, 2014, 04:26:41 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: If you had an Online Subscription: It can be read on any computer, iPad, smart phone, or compatible device.
   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: 1 [2] 3  All   Go Down
  Print  
Author Topic: 12R 22.5 or 11R 24.5  (Read 11069 times)
Sojourner
Guest

« Reply #15 on: March 18, 2007, 08:00:18 PM »

Largest diameter (cover bump & pot holes), lightest tire (least number of ply), lowest or minimum tire's psi as per vehicle axle's load weight according to tire manufacture's weight spec.to achieve softer flex, softer rubber compound tread to achieve softer flex but wear faster, tire availability & cost are the what you want to consider for softer ride.
However the two biggest factor are the largest tire dia & lowest psi give you the best buy for your money to achieve your goal. So look for most available large bus or truck tire with rib treads such as Michelin XZA2.....large rib groove allow more water to enter while rubber tread achieve maximum contact pressure to surface. I believe Michelin XZA2 has the softest tread's durometer than any other brand but still last long enough.

FWIW

Sojourn for Christ, Jerry
Logged
NJT 5573
Hero Member
*****
Offline Offline

Posts: 808




Ignore
« Reply #16 on: March 18, 2007, 10:15:42 PM »

Tekebird, I think the 89 Model 20 was factory 11R24.5 because it was part of NJTs fleet and I've seen alot of her sister coaches. All were equiped with 11R24.5 Alcoas. I may have wrongly assumed the 77 or 79 (can't remember for sure and don't want to go dig the title out this late) was factory 11R24.5. I know it was a Continental Trailways for 10 years. It was then refurbished with 10 caps and sold to a college in Brevard County Florida that traded it to Bart Grabhorn for a newer coach after about 8 years of running the sports teams around. I purchased it in 1995. Its serial number is 19797. Its probably to new for split rims and 20 inch wheels but may fit into the 12R 22.5 era. It came to me with the 24.5 and I don't think Bart changed the wheels. That leaves Trailways and the refurb outfit as possibilities. If you have access to the history on this coach, let me know what you find.
Logged

"Ammo Warrior" Keepers Of The Peace, Creators Of Destruction.
Gold is the money of Kings, Silver is the money of Gentlemen, Barter is the money of Peasants, Debt is the money of Slaves.

$1M in $1000 bills = 8 inches high.
$1B in $1000 bills = 800 feet high.
$1T in $1000 bills = 142 miles high
jjrbus
Hero Member
*****
Offline Offline

Posts: 2313

MCI5C/N Ft Myers FL




Ignore
« Reply #17 on: March 19, 2007, 01:16:18 AM »

I have not had a problem finding the 12R either. I cannot find a 12r tire for less than $400 and that is off brands. I was quoted $532 mounted and balanced for one Goodyear! This is with the luxury of time to shop around. What will I pay if I have to buy a tire on the road ?
 Also these tires are not going to get much milage on them. I just sold 2 Michlens that were 7 years old becuse they are starting to weather check.
Logged

Remember, even at a Mensa convention someone is the dumbest person in the room!

http://photobucket.com/buspictures

http://photobucket.com/buspictures
luvrbus
Guest

« Reply #18 on: March 19, 2007, 06:50:52 AM »

jr if tires prices have went up that much i will be running these toyos for 6 years now,i will get a price today with no trade and post it for you  les schawb sells toyo,bridgestone and michelin
Logged
tekebird
Hero Member
*****
Offline Offline

Posts: 2263





Ignore
« Reply #19 on: March 19, 2007, 06:57:36 AM »

I also have never had any issues finding 12r22.5..........Sometimes it isn't in stock but is brought in the next day.......plus I carry a spare so I am never left to the mercey of a road service tire sale.
Logged
RJ
Former Giant Greenbrier Owner
Hero Member
*****
Offline Offline

Posts: 2858





Ignore
« Reply #20 on: March 19, 2007, 07:42:23 AM »

Doug -

I have several sales brochures for Eagles in my literature collection, both new and used, models 5, 10 & 20.

All of them indicate 11R-24.5 as the OEM tire size.

FWIW. . .

 Wink
Logged

RJ Long
PD4106-2784 No More
Fresno CA
jjrbus
Hero Member
*****
Offline Offline

Posts: 2313

MCI5C/N Ft Myers FL




Ignore
« Reply #21 on: March 19, 2007, 09:00:21 AM »

 If memory serves me right (it never does) I bougth the 2 michlens at Les Schwab in Salem Or. in 2000 I know I paid $802 for two mounted and balanced. Then it cost me another $200 to replace the studs they ruined putting them on!!
Logged

Remember, even at a Mensa convention someone is the dumbest person in the room!

http://photobucket.com/buspictures

http://photobucket.com/buspictures
tekebird
Hero Member
*****
Offline Offline

Posts: 2263





Ignore
« Reply #22 on: March 19, 2007, 10:25:51 AM »

WOW RJ, Thanks for the confirmation.......WHODA THUNK........goofy Eagles ( or should that be well before thier time)........LOL...they always were a truckers favorite bus (Only bus that looks right with aftermarket external sun visor)
Logged
jjrbus
Hero Member
*****
Offline Offline

Posts: 2313

MCI5C/N Ft Myers FL




Ignore
« Reply #23 on: March 23, 2007, 10:16:47 AM »

Jerry, I'm going to need 24.5 wheels if I do this, any suggestions?  Plants are doing well!
Logged

Remember, even at a Mensa convention someone is the dumbest person in the room!

http://photobucket.com/buspictures

http://photobucket.com/buspictures
ol713
Full Member
***
Offline Offline

Posts: 161



WWW

Ignore
« Reply #24 on: March 23, 2007, 07:36:52 PM »

Hi;
   After reading all the replys,  I have one more thing to add.  The 12rx22.5
   tire has a higher weight rating.  (because it is a bus tire)  That means
   additional safety overall.  Since I had a blowout on the front tire, I
   kicked it up a knoch.  I replaced the fronts with 315/80x22.5.  They
   have even a higher weight rateing.  I believe in overkill when it comes
   to tires.
                             Good luck,    Merle.
Logged
jjrbus
Hero Member
*****
Offline Offline

Posts: 2313

MCI5C/N Ft Myers FL




Ignore
« Reply #25 on: March 24, 2007, 02:01:45 PM »

 The nice thing about busing is  doing it your way. If the 315 tires make you happy. Go for it!!!!!  The 11R weight rateing far exceeds the weight of my bus. The only downside I see to bigger tires, is fuel mileage will suffer (not an issue with some of you rich guys) and if the power steering goes out. It may be hard to wrestle it to the side of the road.  Only my opinion of course.
Logged

Remember, even at a Mensa convention someone is the dumbest person in the room!

http://photobucket.com/buspictures

http://photobucket.com/buspictures
TomC
Hero Member
*****
Offline Offline

Posts: 6899





Ignore
« Reply #26 on: March 24, 2007, 10:32:41 PM »

Believe it or not, the 315/80R-22.5 is the most popular tire in Europe for their big rigs.  It is the tire that is replacing the 12R-22.5.  In high speed use, you can get the tire up to 18,000lb for steering and up to 20,000lb with a 55mph limit.  Personally, my 11R-24.5 16 ply tires are a big overkill on my bus.  The steers can take up to just over 14,000lb.  Considering I have 10,500lb on the front, the 11R 16 ply is a big overkill.  I run 90psi in all my tires.  Good Luck, TomC
Logged

Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
tekebird
Hero Member
*****
Offline Offline

Posts: 2263





Ignore
« Reply #27 on: March 25, 2007, 06:53:10 AM »

Does anyone have any thoughts why bus companies run 22.5's in either 12 or the 315 metric version?

and why are the tire companies making them if only buses use them.

Logged
TomC
Hero Member
*****
Offline Offline

Posts: 6899





Ignore
« Reply #28 on: March 25, 2007, 09:37:30 AM »

Tekebird- 24.5 tires are only used in North America.  The rest of the world uses 22.5's.  The 12R's are the original tire that buses were made with in the 50's and 60's.  Now with the advent of advances in tire technology, the metric 315 (which is a 12.2" wide tire) is the replacement.  Very popular with trash trucks, dump trucks and buses.  Some of the bigger buses now are going with 365/65R-22.5 for the front and tags, with 315's on the duallers.  Good Luck, TomC
Logged

Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
tekebird
Hero Member
*****
Offline Offline

Posts: 2263





Ignore
« Reply #29 on: March 25, 2007, 09:57:36 AM »

I understand that the 315 is the metric replacement however MCI is still deliving 12r22.5's on buses.

I was just curious whhy people thought that was.......since everyone is always saying you can't find them on the road.

I have never not been able to find them, and have even looked when not in need.

Logic would have it that is the 24.5 was the "common Tire" that buses would have them....as when a bus needs a tire on the road you have 50 or so upset people.
Logged
Pages: 1 [2] 3  All   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!