Changing from 14" to 15" wheels and tires on a TT

Nope.

Do it as long as you have clearance between the tire and the underside of the trailer.

You can verify that the bolt pattern is the same by measuring between any two lug studs/holes on any wheel. Make the same measurement on one wheel from each trailer. They should all be a 5x4.5 pattern, which is common for small to medium sized travel trailers.

All said and done you've got nothing to lose by trying it yourself except some effort and time.

So who gets stuck with a Prowler with undersize tires?

Tire load stickers have been added to the first post.

Your biggest issue is going to be how much room you have between the tandem axles now and how much that will decrease when you go up in a larger size tire..

I had little 13" wheels and tires on my old 2003 Prowler Lynx.. I wanted to upsize to 14", but found that there would be no room between the tires and suspension travel.

The 13" OEM tires were LR "B" tires... I simply upgraded to LR "D" tires in the same size and problem solved.

See if you can get some LR "D" tires in your current 14" size. That'll likely be better than the "C" and give you that little extra LR.. The bolt pattern of the wheels are all basically the same from 12" to 15" wheels which is 5 on 4.5" bolt pattern.

Good luck! Mitch

You can get about 9000lbs total tire capacity out of a set of LR D 14s. So capacity is not the issue since you’d never have more than 7k on the axles (without being overloaded).

Just an option.

Your trailer brakes will be a little less effective. Might have to readjust your controller.

I would check clearance between tires. If they are really close they will heat each other up, and hot tires are not happy tires.