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Old 09-19-2017, 04:24 PM   #1
Join Date: Nov 2015
Location: Bay Area, California
Posts: 12
Year: 1971
Coachwork: Gillig
Chassis: 743
Engine: Cummins Diesel
Finding 12R 22.5 Tires

Hello, we have a 1971 Gillig bus we have been converting and 3 tires have blown. They are 12R 22.5 and we are having the toughest time finding used ones to replace them in the Bay Area, CA. Anyone know where we should look or also if there are alternative sizes we could use instead? One tire shop said nobody uses this size anymore so they are harder to find. New they are $350-$700 per tire and we are still in conversion phase so on a tight budget. Thoughts?

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Old 09-19-2017, 06:28 PM   #2
Bus Crazy
CaptSquid's Avatar
Join Date: Nov 2015
Location: Billings, MT
Posts: 1,269
Year: 2003
Coachwork: Thomas
Chassis: HDX
Engine: Cat C7
Rated Cap: 84 passenger
Have you tried eBay?
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Old 09-19-2017, 08:03 PM   #3
Join Date: Nov 2015
Location: Midwest
Posts: 2,573
Year: 2003
Coachwork: BlueBird
Chassis: TC2000
Engine: 5.9L Cummins
Rated Cap: '00
I'd be interesting in hearing what tire brands are favored. More importantly- which brands to avoid.

Any suggestions?

If we all wen't so far apart, a Spring Group Buy on tires would be cool- maybe a truck tire chain?
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Old 09-19-2017, 08:16 PM   #4
Bus Crazy
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Join Date: Sep 2013
Location: Vacaville, Ca
Posts: 1,632
Year: 1988
Coachwork: Crown / Pusher
Engine: 8.3 Cummins
I would give Quinlan's Tire in American Canyon a call. 707-642-3230, they deal in big equipment tires & when I used them in the past seemed very fair on pricing & were and always seemed to have a line of rigs waiting.
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Old 09-19-2017, 10:05 PM   #5
Bus Nut
Join Date: Jun 2011
Posts: 751
We replaced our 12R-22.5 with the 315/80r-22.5 Michelin XZA2 Energy tires.
Superior Tire in Salem Oregon did the work and I purchased the tires through the FMCA Michelin program.
We have driven about 6,000 miles with the new tires on all sorts of roads from freeways to rutted dirt Mexican roads and we have had no issues so far.
I did ask about the extra width and Superior was not concerned about it. I looked between the tires and there is lots of daylight.

Wasn't me.
Former owner of a 1969 F600 Skoolie.

1998 Ford B700 Thomas body 65 passenger. 5.9 Cummins 12 valve with MT643 Transmission 123,000 miles.
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12r, tires, used tires

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