Increasing the load rating of my TT tires

[DC8Captain]

This kind of goes with my ST tire thread but thought it was different enough for a new thread.

I currently have a dual axle TT with load range D tires and wheels. Of course the tires and wheels are rated at the minimum required to carry the trailer. Nothing new there as almost all RV's are engineered that way. I am considering going up a load range. The reasoning here is that a load range higher tires and wheels will be less prone to the well known saga of ST tire failure. I think that is sound reasoning but please correct me if I'm wrong. My main question centers around the point that an increase in load range means an increase in tire pressure. My concern is that a tire with a higher inflated pressure will not be as forgiving when going over bumps and potholes. What I mean by that is that the jarring on the TT will be harder and thus increase wear and tear on the TT. We all know about RV manufacturing standards and Quality Control and it concerns me. I can't financially go out and buy another TT when it suits me. I have this one and it has to last.

[DesertRat]

Dale
My guess is you have 15" tires & wheels. I don't think you will find any "E" rated 15" tires. Load range higher than what you have doesn't mean more air pressure all the time. My 16" load range "G" tires took the same air pressure as my 17.5" load range "J" ones.

[DC8Captain]

Sorry - I have load range C tires. They are 205/75 14. If I move up to D the pressure increases from 50 to 65 psi

[DesertRat]

Friend did it & said how much nicer his 5th wheel towed. Yes well worth the little extra $ it cost.

[Occupant5143]

Originally Posted by DesertRat

Dale
My guess is you have 15" tires & wheels. I don't think you will find any "E" rated 15" tires. Load range higher than what you have doesn't mean more air pressure all the time. My 16" load range "G" tires took the same air pressure as my 17.5" load range "J" ones.

My Maxxis ST225/75R15 tires are rated at "E" (2830 pounds @ 80psi). Check it out here. http://www.maxxis.com/trailer/traile...nflation-chart

I have over 5000 miles on them and they still look new.
UPDATE: Oops! No load range "E" for ST205/75R15. Sorry!

[hddecker]

Originally Posted by Fdhealy4

Sorry - I have load range C tires. They are 205/75 14. If I move up to D the pressure increases from 50 to 65 psi

You can never go wrong with going up a load range.

When I replaced my LR Es, with LR Gs and also went up 1 aspect ratio. Towmax gave me 5K, my Gladiators got to 25K before the broken shackle shreded them. I was looking to get another 15K next year on our NASCAR tour. (provided our dollar doesn't tank any further).