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Old 10-20-2020, 09:23 PM   #1
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Exclamation Locating 17.5 or upsize to 19.5?

Have been looking for tires to fit but 17.5 tires the cost for 7 tires is way above my budget for it. Currently tirs hold air and good tread but badly weather checked. Question is I can get 19.5 with 10 hole wheels would need adapters from 8 hole to 10.
Any ideas?
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Old 10-20-2020, 09:33 PM   #2
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The adaptors ; IF available; would move the tire/wheel out possibly as much as 2" and could make for clearance issues , on fenders , any difference in tire height could give clearance issues with your floor .
Difference in height , also effects , your differential gearing and aside from speedo problems , performance on hills and fuel mileage .

Any adaptor you consider , make sure it's rated for your RV weight.

JMHO: Keep shopping for 17.5" tires that suit your budget.
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Old 10-20-2020, 10:10 PM   #3
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Simpletire.com has a big selection under $200.
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Old 10-21-2020, 05:47 AM   #4
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You seem to have a P30 coach, I think the lighter P30 chassis was available with 19.5 inch wheels on 8 lug hubs, so that is probably what you want. The 10 Lug P30 wheels were on the 15,500 GVWR chassis and up. These should be available from Colaws, and the other RV salvage yards for around $75 each.
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Old 10-21-2020, 04:04 PM   #5
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Quote:
Originally Posted by Lonesome54 View Post
Have been looking for tires to fit but 17.5 tires the cost for 7 tires is way above my budget for it. Currently tirs hold air and good tread but badly weather checked. Question is I can get 19.5 with 10 hole wheels would need adapters from 8 hole to 10.
Any ideas?
Forgive my ignorance, but are you saying that you can get 19.5" wheels and tires for cheaper than a set of 17.5" tires...???

I must be misunderstanding something...
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Old 10-23-2020, 03:14 AM   #6
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Quote:
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Forgive my ignorance, but are you saying that you can get 19.5" wheels and tires for cheaper than a set of 17.5" tires...???

I must be misunderstanding something...
From what I've been able to find the 17.5 are almost impossible to find even used...and yes cost more then 19.5 tires
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Old 10-23-2020, 11:24 AM   #7
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Originally Posted by Lonesome54 View Post
From what I've been able to find the 17.5 are almost impossible to find even used...and yes cost more then 19.5 tires
Wow... good to know, I would have never suspected that...
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Old 10-23-2020, 05:22 PM   #8
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How close are you on weight per tire? Most 19.5 tires will max out at a lower rating than the 17.5s...
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Old 10-24-2020, 05:00 PM   #9
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well not sure not ran betsy over scales yet
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Old 10-24-2020, 06:03 PM   #10
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How close are you on weight per tire? Most 19.5 tires will max out at a lower rating than the 17.5s...
Hugh? How do you figure that?

Example from TOYO Website

Tire Size

215/75R17.5 max load 3530
225/70R19.5 Max Load Single 3640/95

https://www.toyotires.com/commercial...ban-drive-tire
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Old 10-25-2020, 10:41 AM   #11
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Pardon my limited knowledge of these tire sizes----19.5 on my 450=3970; on my Suites, it was either 4805 or 6005, depending on whether it was the OEM 215s or the replacement 235s...I had considered changing the trailer to 19.5s, but it did not make sense after checking these ratings. Am not familiar with other 19.5s used for E450s and such. Thanks for the correction.
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