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Old 09-22-2014, 12:53 PM   #1
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Tires for 2001 Affinity

Those of you that have a 2001 40' Affinity with tag...does anyone put 315 80R/22.5 on the drive tires?

Our placard shows 315 80R/22.5 on the drive and steer and 12R/22.5 on tag but when we purchased this coach there was 12R/22.5 on the drive and tag & 31580R/22.5 on the steer. The coach manual states 12R on the tag and drive and 31580R/22.5 on the steer. Confusion on the conflicting information. Is there enough clearance to put 31580R/22.5 on the drive?

Checking with Michelin and dealers indicates out of stock on 31580R/22.5 and no ETA when available. We are wanting to install all new tires but want to use the Michelin Advantage program. Do not want to wait until one of them has an issue and have to resort to a mix-match of tires.
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Old 09-22-2014, 07:50 PM   #2
laj
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it should have 12-22.5 drives and tag, 315-80-22.5 on steer. personally i wouldn't mix the back. Stock set-up
works perfect on mine.
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Old 09-22-2014, 08:15 PM   #3
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I hope I have the clearance for the 315/80R...which is on the placard...I agree with you not to mix the rear....Les Schwab has agreed to try the 315's if they fit good to go ...if not 12R's on the back with max. pressure. Will know next Tuesday....Thanks
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Old 09-22-2014, 10:33 PM   #4
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olyshed - I have a 2002 Affinity. All my documentation says that 12R's on the drive tires. That is what I have. Is there a reason you want to change that? I do have 315's on steer tires just like my documentation says it should. I would not worry too much about brand of tires. There are quite a few good makers of 315 and 12R tires. I do buy USA made tires, but I do not think Michelin is the cat's meow like they were 25 years ago. I have never had an issue with any tires on my last two motorhomes. I have had Michelin, Firestone, Dunlop, Goodyear, and BF Goodrich. All worked as expected.
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Old 09-23-2014, 10:41 AM   #5
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Affinity Tires

B. Bob,

Thanks for the input...my placard has 315's on the drive...although 12R's are on it..I wanted the 315's so I could lower my PSI ...with my weights I need to put 120PSI in 12R's ...if I use 315's I could go to 110PSI or so....Hoping for a better ride.
Thanks,
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Old 09-23-2014, 11:12 PM   #6
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Olyshed,

When you say "placard" I am not sure what you mean. I assume a label somewhere on the coach telling you what tires to get. I have always just gone by what it said on the CC brochure for 2002 Affinity.

The label to the left of my drivers seat tells me 130 - 110 - 120. I usually have a bit less in them. I don't notice that it rides much if any better at lower air pressure. My coach rides very smoothly on good pavement and poorly on Los Angles freeways. This is due to LA's fourth World roads these days. Jeep roads in Moab are better than some LA freeways.
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Old 09-24-2014, 10:26 AM   #7
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Tires

B Bob.....Yes the label by the drivers seat....ours has front 315's, drive 315's, and tag 12R's....when we weighted it these tire would be better...but it has 12R's on all 6 rears...and I don't think 315's will fit...but will try next week. Have you ever questioned why 120PSI in the tag ...when it has less than 10,000lb. I just believe if 315's will fit and require a lot less pressure the ride will improve.
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Old 10-18-2014, 09:53 PM   #8
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After trying tires like pairs of shoes ....Les Schwab in Junction City ..went the mile...it was determined that the placard was correct or at least the best way to go...315's on the steer and drive and 12R's for the tag..with the lower air pressure the ride improved.
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Old 10-26-2014, 10:48 PM   #9
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interesting to learn. mine is not an affinity, an intrigue, the label specifies to use 12r22.5 for all. 120 psi for front and 100 psi for rear (no tag). the front is higher than rear, which is opposite to yours.
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Old 10-27-2014, 07:57 AM   #10
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Made me look!

2001 Affinity, placard says 315's on front, 12r's drive and tag. 120 - 110 - 120.
And that's the configuration currently installed. BF Goodrch
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Old 10-27-2014, 09:22 AM   #11
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With the Affinity being so well loaded with neato stuff and goodies, they're heavier then other coaches down the model line up.

With that extra weight, but with the larger 315 tires on some positions, I'm curious how the four corner weights and actual tire manufacturers recommend PSI comes out. Compared to the placard PSI numbers?

Our 40' Allure with Tags, PSI settings are a good 15-20 PSI below the placard numbers.

OP - Congrats on the new shoes, and glad to hear LS did you well!

Best to all,
Smitty
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