205/75/15
I’m thinking about increasing the tire size from a 205/75/15 to 225/75/15 on a 2001 Jayco Quest. Has anyone increased to that tire size? Are there any benefits? Any recommended ST tire ply...
Forum Discussion
I always do and have gone to a larger than the OEM tire on all our Vehicles, TT's, 5th wheels, boat trailers, etc when replacing the OEM's but only if there's room for a larger tire. Probably well over 2 dozen times so far over the last 40-50 years. The tread depth lasts much longer than OEM's and the tires are not stressed to their max rating. Usually only approx $10 per tire to go bigger and/or stronger and gain so much. It's been a win everytime. The manufacturer never seems to use a heavy/high enough capacity tire to suit me and it's all about cost! What's wrong with having a safety margin anyway as I'm a retired aoutmotive engineer and know better than to design to only 100% of the required minimums. 125%+ makes so much more sense! Just hitting a chuckhole etc with a tire already stressed to 100% can or may be the final tire killer and it's avoidable!
Don't get crazy though with extremes in tire sizes and create other problems like rubbing or hydroplanning during heavy rains. Which vehicle or RV you have can make a lot of difference also and also the climate/weather/temps should be considered on how much larger a tire or type is used.
Those are human lifes being carried in vehicles and even having a blown tire on an RV will ruin a fun vacation or weekend and why? So why not be a little safer and also save money in the long run?
Examples: The 245/75/16 "E" OEM Bridgestone etc tires with 3042 capacity on our trucks were replaced with 265 Michelins with 3415 capacity. The 225/75/15 "D" radials OEM's with 2540 capacity at 65 psi on the trailers were replaced with 225/75/15 "E" range radial tires having 2830 capacity at 80 psi.
Twice I've had to put a 1" spacer between the spring and the axle to gain needed room above the tire but that's no big deal and very cheap to do.
Using the right tool/item for the real task at hand always and then life usually goes so much smoother.
Don't get crazy though with extremes in tire sizes and create other problems like rubbing or hydroplanning during heavy rains. Which vehicle or RV you have can make a lot of difference also and also the climate/weather/temps should be considered on how much larger a tire or type is used.
Those are human lifes being carried in vehicles and even having a blown tire on an RV will ruin a fun vacation or weekend and why? So why not be a little safer and also save money in the long run?
Examples: The 245/75/16 "E" OEM Bridgestone etc tires with 3042 capacity on our trucks were replaced with 265 Michelins with 3415 capacity. The 225/75/15 "D" radials OEM's with 2540 capacity at 65 psi on the trailers were replaced with 225/75/15 "E" range radial tires having 2830 capacity at 80 psi.
Twice I've had to put a 1" spacer between the spring and the axle to gain needed room above the tire but that's no big deal and very cheap to do.
Using the right tool/item for the real task at hand always and then life usually goes so much smoother.
