irish123
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The path is narrow but there are many roads to the Masters house!
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Shasta Compact 1969
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Post by irish123 on May 18, 2021 13:40:00 GMT -8
I have two Mastertrack UN203 ST 175/80R13 91/87M 6 PR High Speed Special Trailer Tires on my Shasta Compact. Sidewall sez 50 pounds... should I run it with that or a little lower say 46psi?
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turbodaddy
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17' 1965 Fan "Sunseeker"
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Post by turbodaddy on May 18, 2021 17:18:58 GMT -8
Do what the manufacturer sez. You made a good choice by going with ST tires...they are much safer, but just because you "can" go 70mph doesn't mean it is a good idea when towing an antique camper. This is especially true if you do not know for certain what the structural condition of the trailer is. I usually go about 65 mph tops towing a 3500 lb. trailer with a 1/2 ton GMC Sierra. It is comforting to know that I can go 70mph safely if necessary to pass or get out of the way.
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nccamper
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1962 Forester- 1956 Shasta
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Post by nccamper on May 19, 2021 4:09:24 GMT -8
I also vote for the the max manufacturer approved pressure.
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Post by bigbill on May 19, 2021 4:15:25 GMT -8
The tire has to be inflated to max pressure to carry the stated load rating, as pressure drops the carrying/load rating drops drastically also the tire flexes more causing heat build up which leads to failure. I always keep inflated to max pressure on my trailers.
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irish123
Member
The path is narrow but there are many roads to the Masters house!
Posts: 32
Likes: 3
Shasta Compact 1969
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Post by irish123 on May 21, 2021 1:17:31 GMT -8
50 psi it is!
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sawset
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1958 Mobile Scout
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Post by sawset on May 21, 2021 3:03:03 GMT -8
I used to be less concerned about tire pressure at least on trailers and utility equipment. Maybe because the repercussions were never apparent. That all changed when after loading but under inflating a new perfectly good set of trailer tires, they ended up with torn belts and a nice egg shape. Useless. Lesson (an expensive lesson) learned.
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