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Old 02-23-2015, 09:00 AM   #1
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What Brand Tires to purchase for aluminum rims

We have a Sunset Trail Reserve 25rb weights 6050 pounds without anything in it. They have put new axles on it this week and we need to replace the tires on aluminum rims the tires we have now are ST225/75R15 D with a psi rating of 50 pounds. All tires we are looking at now have a PSI of 65 pounds can our rims handle that psi difference.
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Old 02-23-2015, 10:14 AM   #2
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It should be stamped on the inside of your rims. Otherwise ask who ever you got the rims from.
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Old 02-23-2015, 10:16 AM   #3
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These are the original rims just replacing tires.
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Old 02-23-2015, 10:20 AM   #4
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It still should be stamped on the inside (opposite the valve stem) what the PSI rating is.
Most are stamped on the outside where you can read it. I have seen some where they stamped it on the inside and the tire has to come off the rim to read it.
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Old 02-23-2015, 08:19 PM   #5
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We will have to go over there on Weds and see if we can read the psi from the rim. So confusing when the manufacturer does not know what psi our rims will take. If I had not read on line about the aluminum rims not able to take a higher tire pressure we would of bought an E tire instead of a D.
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Old 02-24-2015, 10:45 AM   #6
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Your original tires should be st20575-15 c-rated at 50 psi with 5 studs. (mine are) The 225's are to wide for the 205 rims. And require a 6 stud pattern.
When you got new axles,did they re use your 8" brakes?
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Old 02-24-2015, 02:18 PM   #7
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No I wrote down what the tires were and they were st225/75 r15 45 psi right off the tire. I believe they are replacing brakes we are going over there tomorrow to check things out
I did not write down the D but it seemed to me it was because we were looking into upgrading to an E tire, but they are 80 psi. and we were told the aluminum rims cannot hold that weight. I wrote to crossroads so will let you know what they say.
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Old 02-24-2015, 03:29 PM   #8
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For our trailer ,it came with c rate 205's. the 2014 26' and up had 225's. 25rb was discontinued. look to see if it is 5 or 6 stud. 225's won't fit right on 5 stud rjms as the rims for 225's are wider. there is no way you need e rated tires.
Do not know were you saw 45 psi , usually the st tires say 50 psi...
I just got new axles,springs and tires last summer, so kinda remember the #'s...at least I think.
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Old 02-24-2015, 03:40 PM   #9
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When they replace the axles do they repack the bearings and grease fittings. I am anxious to see what size tires are on the trailer now. I was sure we wrote the numbers down correctly. It was one of the last trailers with the two year warranty which ran out Feb 7, so we were lucky we noticed the wear on the tires while winterizing it. I will write it all out again tomorrow. Thanks Chris
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Old 02-24-2015, 03:55 PM   #10
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They will probably re use your 8" brakes and will have to put new seals and repack bearings as it is only the axle being replaced . When they use 8" brakes with a 5200 # axle ,that makes it a 4400# axle. like the newer ones. If they keep 8" brakes then they will have to use 5 stud rims ,so the new tires will be c rated. You can get d rated in 205's. I have them on my boat trailer.
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