Questionis load rating the weight per side or total together.my pop-up weighs 1800 lbs. what load rating do i use?5.30x12 is what is on it now.LRB i think i should use LRC?also how long do they last they look good but they are old?
AnswerDon,
A 5.30-12 Load Range B has a load carrying capacity of 855# at 55 psi - this would be for each tire - so, if you only have 2 tires on the trailer, yes, a LR B does have enough load carrying capacity - but just barely. Plus, at this load / inflation, you are restricted to 65 mph. It might be better to get a Load Range C and use 10 psi more inflation pressure (65 psi), and you'll raise the speed restriction to 85 mph.
How long do they last?
Recent bulletins from the tire industry indicate that tires degrade simply due to time. The age of a tire is important even if the tire is unused. There some disagreement over how to best express this age limitation, but my take is:
If you live in a hot climate (AZ, CA, NV, TX, and FL) then the limit is six years. If you live in a cold climate (MN, ND, WI, MT, etc), then the limit is 10 years. States in between are ..... ah ........ in between.
Here's how to tell how old the tires are:
First locate the letters "DOT" on the sidewall of the tire. Nearby will be the DOT code. DOT codes are 10 to 12 digits long. BTW the digits can be numbers or letters.
The first 2 digits are a code for the manufacturing plant.
The next 2 digits are a code for the tire size.
The next 3 or 4 digits are a code for the type of tire.
The last 3 or 4 digits are the date code. The format is week/week/year/year or week/week/year. These are always numbers.
Starting in the year 2000, the date coding used was 4 digits. That means the largest number you should see for the year is 09. Before 1999 the format was 3 digits. 1999 and 2000 are transition years, so you will find both 3 and 4 digits.
The date code only has to be on one side – and it is permissible for there to be a partial DOT code, so long as one side has the complete code.
