Trail Express 225/75 r15...2yr 7 mo 4 inch deterioration crack on both tires near bead on right side of trailer....just showing up....8500 miles...sat 3 times without moving for about 40 days.....rest of time moved regular....ctp always 50+ sitting or moving. speed 56-58 mph...never over 60.....uv protected....never curbed or damaged....they look like the day the new trailer was delivered and still have full nibs, except for the cracking....so along with tpms, which did not show anything, the good visual inspection picked it up....C rating and never carried more than 80-85% of max allowable weight....tires never hot and always good pressure by tpms....they are full of nitrogen/air added to maintain and look great....have to go 30 miles to get 4 new maxxis D rating.....Tues....lowest maxxis rating in my size is D....I wanted to stay with the C,s but fine with the D s .....will follow tire table and use chalk line to see what inflation necessary for proper road contact....I am going to start out at 55-60 lbs to see how that will work to keep the tire print proper....maybe will be able to run a lower pressure since weight per tire will be around 1750....my goal is to eliminate bounce, and maintain full safety.....while getting the smooth ride.....anyone with input about ctp under max allowable appreciated.....the ride with the C tires was smooth enough to drink coffee from a cup with no lid and no spill.....while sitting at the table....over the tires....they were at ctp 50 lbs when starting the day......this now gives me data that oem tires taken care of correctly and never abused last 3 yrs....from date on tire.....hope this info may help.....bottom line I am satisfied with the tires, but would have hoped for a little longer service.....
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