upgrading to 16" wheels

I was in the same position as you however I wanted to get additional height so I opted for taller tires, in your case 225/75r16's in LT e rated would be ideal as they offer a little over 200# more capacity per tire compared to the factory setup.

My unit came with Sendel wheels and they look to be of good quality, the specs are good. I'm going with the. Same Sendel wheels that my unit came with but in 16's instead.

With the measurements you posted, I would not shy away from the 1" diameter larger tires, you have plenty of clearance left.

You are going to loose 1/2 inch on all sides from the rim, plus the difference in tire sidewall. Plan on about 1 inch per tire. So the 4 above would be 3, the 6 between would be 4. Best upgrade on my TT years ago, I ended up going to 245/75/16 tires, and timed it to take the old tires off the TV and put them on the new rims for the trailer. Total cost was under $400 for the rims, the tire place mounted and balanced for free since I was buying more. I ended up with over 12k of tires on a 9900 TT. I put 22-25k a year on my TV (mostly empty - DD), so the tires have ~10k left on them when I change them, not enough for another winter, but more then enough for the trailer. The trailer ends up with newer tires when the current ones hit ~4 years old.

clotus wrote:
I was under the impression they did not make LTs in 15"....the quest continues

E-rated 15" LTs are not available. Plenty of D-rated are. Given that my 11,300 GVW FW was placarded for D's, anything significantly lighter shouldn't be an issue. Now, if you're on the edge of a D-rated LT tire for your weight, some tire shops won't install them, so you'd need to take the wheels off yourself and have the new tires mounted and balanced, then reinstall them on your trailer. Posting the placard info would be helpful.

Lyle

I was under the impression they did not make LTs in 15"....the quest continues

unless you just really want to go up to 16s, they make LT's in 15". you can look at tirerack.com, discount tire or several other sites and find several different tires. by your measurements, it looks like you have the room to go larger if you want. I run 16" Goodrich commercial t/a's