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Old 07-03-2015, 01:02 AM   #1
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Upgrade tires to 365/70

Has anyone upsized there front tires from 315s to 365s? Im wondering if there are any clearance problems.
Rod
08 magna
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Old 07-03-2015, 01:08 AM   #2
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Rod: our '09 has the 365/70's but it was built for them. Are you wanting to go from the 315/80's? The 365's take a 10" wide wheel too as I remember.
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Old 07-03-2015, 09:53 AM   #3
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Yes it will need a 10.5 inch wheel. I wondering if the extra width all goes to the inside or is the offset shared with the face of the wheel. Does your front and tag look the same as far as wheel offset?
Rod
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Old 07-03-2015, 05:05 PM   #4
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Yes, offset looks the same. Here are two pictures, front is the top one. Almost the same orientation of the valve stem too!

Deen
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Old 07-03-2015, 05:28 PM   #5
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Thanks for the pictures. I was going to shoot you a note and ask if you could take one for me.
Rod
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Old 07-05-2015, 11:44 PM   #6
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My thought by installing a larger tire is 1000lbs more capacity per tire and a reduction in pressure from 130 to around 105 would result in a less harsh ride on bad roads. I would like to hear opinions. Am I thinking right regarding the lower tire pressures ?
Rod
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Old 07-05-2015, 11:59 PM   #7
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Rod:
Yes you could lower the pressure based on your weight and required minimum pressure. I did that on the previous Dutch Star although I really didn't notice much ride difference.
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Old 07-07-2015, 05:54 PM   #8
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Quote:
Originally Posted by IASM View Post
My thought by installing a larger tire is 1000lbs more capacity per tire and a reduction in pressure from 130 to around 105 would result in a less harsh ride on bad roads. I would like to hear opinions. Am I thinking right regarding the lower tire pressures ?
Rod
I just had the fabric replaced on one of my awnings and asked Holland Motor Homes who were a prominent CC dealer and asked them this question. Here is they told me: For 365's you need a 10.5" wide rim as opposed to the 9" wide for the 315's. The cost is:
$785 per tire installed
$549 per rim
So, for both front tires and rim it will be $2,668
The BIG question, which they didn't know is would the coach have enough clearance?
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Old 07-08-2015, 12:01 AM   #9
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so far it appears there is clearance. I talked to gary at premier and he had an 07 in for service and it had the 365s and the owner was quite pleased.He was going to send me some pictures and take a closer look. I would like a little wiggle room for capacity since it appears full of fuel im very close to the capacity of the tires. The wheels are easy to get and cost 450 but the tires are on backorder and Michelin had no idea when they will be available and only could confirm nation wide baxkorder so I am a little concerned with installing a tire that may be unavailable if there was a failure on the road. I know a lot of oem machines are using the tire but what would be the plan if one failed. My local dealer said they have been waiting for some tires since October 2014 from Michelin.
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Old 07-08-2015, 09:16 AM   #10
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so far it appears there is clearance. I talked to gary at premier and he had an 07 in for service and it had the 365s and the owner was quite pleased.He was going to send me some pictures and take a closer look. I would like a little wiggle room for capacity since it appears full of fuel im very close to the capacity of the tires. The wheels are easy to get and cost 450 but the tires are on backorder and Michelin had no idea when they will be available and only could confirm nation wide baxkorder so I am a little concerned with installing a tire that may be unavailable if there was a failure on the road. I know a lot of oem machines are using the tire but what would be the plan if one failed. My local dealer said they have been waiting for some tires since October 2014 from Michelin.
365/70s are standard on the front and tag on new Prevosts, and a lot of Prevost owners are changing out the front and tag tires with the bigger tire. In the long run, I don't think you will have problems finding the 365/70s.
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Old 07-08-2015, 08:41 PM   #11
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so far it appears there is clearance. I talked to gary at premier and he had an 07 in for service and it had the 365s and the owner was quite pleased.He was going to send me some pictures and take a closer look. I would like a little wiggle room for capacity since it appears full of fuel im very close to the capacity of the tires. The wheels are easy to get and cost 450 but the tires are on backorder and Michelin had no idea when they will be available and only could confirm nation wide baxkorder so I am a little concerned with installing a tire that may be unavailable if there was a failure on the road. I know a lot of oem machines are using the tire but what would be the plan if one failed. My local dealer said they have been waiting for some tires since October 2014 from Michelin.
Today I saw a 2003 Blue Bird it had the front tires changed from 315's to 365's. I talked to the owner at quite some length. He, too, was very pleased with the change. He said he has 98 psi, now in the front tires, and the ride is much smoother than before. He said after the change, he had his chassis ' all wheels aligned. I don't know if that is real necessary or not!
BTW, one additional cost to my previous figures of$2,668 wold be the new longer wheel lugs.
Keep us posted, I 'm really interested in doing it too!
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Old 07-08-2015, 09:37 PM   #12
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I was not aware of any change in stud length. I will check it out.
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Old 07-09-2015, 09:24 AM   #13
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Rod:
Yes you could lower the pressure based on your weight and required minimum pressure. I did that on the previous Dutch Star although I really didn't notice much ride difference.
Mr_D: You wouldn't happen to know what your rim width is? Is it 10.5"?
Butch Williams told me that he knows of several 2007 Magna owners who have put 365's in the front. I have 130 psi in the front, and it really rides hard (bumpy). I'm going to do the change - still not sure whether it needs longer wheel lugs.
The irony is, I just bought my 315's - one has less than 200 mi, and the other less than 1500 mi.
Thanks
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Old 07-09-2015, 10:40 AM   #14
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Mr_D: You wouldn't happen to know what your rim width is? Is it 10.5"?
Butch Williams told me that he knows of several 2007 Magna owners who have put 365's in the front. I have 130 psi in the front, and it really rides hard (bumpy). I'm going to do the change - still not sure whether it needs longer wheel lugs.
The irony is, I just bought my 315's - one has less than 200 mi, and the other less than 1500 mi.
Thanks
Rim width for the 365 tires is 10.5 inches.
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