I still consider myself a newbie to caravanning, but Im especially a learner when it comes to tyre sizing.
I am shortly going to be in the market for new tyres. I currently run 225/75 R15C (110/108Q) on my dual axle 19 caravan.
These do not appear to be the most common of sizes. Is it possible to increase the tyre size to something more readily available.
I have just been and obtained a few measurements for the experts to ponder over.
From the outer wall of the tyre there is approximately 60/65mm clearance to the inside of the caravan wall, and the same plus a bit more on the inside of the tyre. There is ample clearance above the tyre and there is approximately 100mm between the front and the rear tyres.
What are the thoughts of the more knowledgeable, if I can change tyre size safely, and what sizes do you suggest
The caravan weighs approximately 2900 kgs loaded
-- Edited by shakey55 on Thursday 20th of November 2025 12:52:58 PM
These are readily available as many vans do run these (certainly Jayco do) and are relatively easy to find at reasonable price. They also shouldnt be a problem re fitment. Perhaps discuss with one of the tyre companies like Bob Jane or Tyrepower re using them.
I currently have that size Toyo Open Country on our 2750kg ATM van and been very pleased with them. Being replaced in new year due to age (8 years), but still have 60%+ tread. Please no lectures re age!
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Regards Ian
Chaos, mayhem, confusion. Good my job here is done
Unless you are matching size with your car tyres to use as additional spares, there is usually no need to put All-Terrain or Mud-Terrain tyres on your caravan. A/T and M/T tyres are designed to provide traction for wheels which are driven (by the vehicle engine) and when used on a caravan or trailer the handling, fuel consumption and road grip will usually be slightly negatively affected.
I've always used Light Truck rated tyres with a normal road tread pattern on our caravan and trailers. My trailers are regularly overloaded and bashing around on very rough tracks on our property and I've never had any problems with the tyres I use.
