Changing out 13" wheels for 15" wheels

[Ed Morris]

I'm sure this has been asked and answered before, but I would like to know if it is ok to replace 13" 5 bolt wheels with 15" 5 bolt wheels (4.5" bolt centers)?

This would be on a 1994 Casita Freedom Deluxe 16' trailer

[Roy in TO]

Hi Ed,

The best answer is if you look up the specs for each tire you plan on using. Compare that to what you have on your trailer now and how much room you have.

I found over a 2" difference in 13" tires because of the profile #'s. You can see the difference in my post below:
http://www.fiberglassrv.com/forums/f...tml#post168308

[Robert Johans]

I always replace 13" wheels with 15's on my restorations. As long as you have plenty of wheel well space to allow for wheel travel, AND you use tires specified for your load and use, there is no problem. In fact, you will probably get a better ride.

One caveat: larger wheels and tires put more strain on the trailer's original brakes, if you have them. Dexter TorFlex axles, appropriately sized for the weight of your trailer, can be bought with oversized brakes to accommodate the bigger wheels.

[Joe Romas]

Ed.

I have a 1999 17' Casita SD and when I switched from 14" to 15" tires and wheels 6 or seven years ago there was a slight rubbing on the left side going over bumps. I was thinking the axle was just not aligned properly so I designed and made a slight lift, about 1.75". When I started to align the axle I quickly found the axle was aligned correctly but the "egg" was not centered on the frame.
I agree with Robert, unless it's been replaced already the Dexter torque flex axle is past due. I've read that Dexter says 15-20 years and my 19 year old trailer's ride has gotten much harsher over the past five years.
As they age the rubber suspension parts harden resulting in a very hard ride.
I ordered a new axle "beam" only just week. I have about 8k miles total on my brake drums and backing plates and have a new set of Timken bearings and new seals.
Cost for the axle beam only at a local RedNeck trailer supply was under $300 plus tax. The 3500 pound axle comes with 10 brakes.