Tyres and pressures

We are quite confused about our tyre pressures. The card inside the door says they should be 33psi front and rear normally and 35 psi front and 41 psi rear fully laden.

 

The car (Suzuki Vitara Auto) is now a year old, but we have only done 3,000 miles, about half of it towing our lightweight 688kg MIRO Trigano Mini Freestyle 290.

 

When we were about to embark on our first trip in August we checked the tyre pressures and were surprised that they were all set to 41psi, having only just been through a 3 month check with the dealer.

 

Since then, we have been driving around with tyre pressures corresponding the card inside the door explained above, changing it when towing to the fully laden pressures.

 

We just had our annual service. We decided to use a local garage who services our other car rather than the main dealer. This is because to be honest we don't trust the dealer that much. The car is fine, but we had lots of difficulties with them unable to sort out our towing electrics properly and ended up having to pay to go to a specialist, which didn't give us much confidence in them and really gave us the impression they didn't really know very much.

 

Then we had the car serviced by the local garage, the service report said the tyres have worn by 33% already, which seems ridiculous when we have only done 3000 miles. So now we are wondering if the tyre pressures on the door are right.

 

I have just done an online check for our registration and got this result. I'm so confused now. We are supposed to be going away in a couple of weeks for our first towing trip of the year and now I'm worried the tyres might not be safe for towing.

 

Any advice would be welcome.

 

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