Is it possible to increase your clearance?

[Oinkoink]

We have a 2019 Pilot 7.4m on a Fiat Ducato, the tow bar often grates on the ground, can you replace 15” with 16” rims?
What issues are there?
It came out of the factory on 15” so is there an issue with the gearing? (comformatic)
Milometer speedometer will be slightly out, I use a speed app so not an issue
Are the stud spacings the same on the different rims
Obviously don’t want to lower the profile of the tyres to balance things out as it defeats the object
Are there other ways of increasing clearance, springing, suspension…..??
Would appreciate wisdom from others!!

 

[Blaydon]

Hi folks. We had ‘catch’ problems with ours. I put air assist on which helps. However I also made up a roller fixed to the tow bar just in case.
I’ll take some photos tomorrow when the sun has got out of bed.