I need to buy new trailer tires and I'm not sure which ones to get,Goodyear Marathons or Towmasters. I've also heard Goodyear Workhorses are good too.

ONLY Goodyear Marathon (if you go with trailer tires). Forget Carlisle, they are crap and no one here has had good experiences with them. I had Goodyear Workhorse tires on my Tahoe for about 1 day, and returned them. I thought they were a terrible squishy feel. I would not put them on my trailer either.

I have LT truck tires on my trailer.

Cooper also has trailer tires now too, and Cooper makes a great tire.

I've used GY Marathons for years on car and boat trailers and never had a problem. This includes trips to Orlando , Dallas , Minneapolis , Springfield MO , Richmond , Dearborn , New Orleans and all over New England all from S. Jersey.
I'm getting to need them again this season. Gotta check out GY prices again.
Anybody else had any experience with Coopers?

Got the coopers on my tandem. Wear is great. I replaced 2 and they were a bit more expensive than the marathons but I think the load rating is a bit better. I know the sidewalls are much stiffer , I've mounted both. They do flat spot bad when the trailer sits for a while but a few miles and they are smooth again. My bud has the marathons on his triple with the same boat , 29 scarab twins, and seems to go through more tires. I think he hits the curb not really the tires fault.

15's or 16's? if there 16's I use LT tires, Late model Chevy 2500HD takeoffs, Bridgestones E rated $60 each new

Craney, We move alot of both brands you mentioned, the Towmasters are usually 10 to 15 Dollars cheeper per Tire, than the Goodyears, and seem to be a pretty decent tire, but I've never ran them myself only because I've had great luck with the Goodyears. If you have 16 inch rims, we sell alot of the Firestone R4S, the Bridgestone V-Steel, and the Michelin XPS Rib, the last two have an all steel casing and pretty dam expensive for Trl. Tire use, but it usually cost a little more to go "First Class"

Mitch

I have been using the goodyear workhorse's for a long time, have served me well on the trailer. I would not put the on a truck though...BZ

I have used the Carlise tires on all my trailers with great luck. My father in law is in the automobile business and we do alot of tires and he recomends these as well.

doesnt Goodyear own Carliye?

I need 15s.