Originally Posted by mgood777
Buying a new 2016 Wildcat Maxx 313RE. I don't know the measurements, but the axles on this model are close together. Only about 2" between the factory 235/80-16 tires. Seems like the most common LT tire sizes that are upgraded to would be 245/75-16 or 235/85-16. I have concerns about both. I'm worried that the 235s would decrease the distance between tires too much, but before buying the 245s I'd like to hear from somebody who says that inside clearance and turning with the wider tires hasn't been a problem for them.
Any advice? Thanks in advance.
You can consult tire company web site on approximate tire dimensions. Actual tires may vary by +/- 1/4".
Next confirm the clearance on the current size tires. Does your dealer have a 313RE on the lot? You need to measure tire to frame, suspension body or spring clearance and 3" side clearance is suggested as trailers have a lot of side to side movement.
In addition to clearance when changing ftom ST to LT be sure the new tires have equal or better load capacity. This info is available on the load tables. Your ST tires are probably rated at the tire max inflation so using that number of pounds load capacity your LT tires MUST be able to support at least the same number of pounds and preferably more otherwise why make a change? The new inflation becomes your MINIMUM cold tire inflation.
Since you are making this change for safety reasons you should also consider a TPMS so the driver gets a warning as soon as a tire looses a few psi and you are not waiting for a passing motorist to wave at you through their window signaling that you have had a failure. Good 4 tire TPMS start at less than $300. Contact the TPM dealer (not just the seller like eBay or Amazon) for advice on distance from tires to the monitor that mounts on the dash.
I write a blog on RV tire application and safety. RVTireSafety.com
Also give seminars on tires at RV events across the US. 40 years experience as tire design & quality engineer for major tire mfg. Freelander 23QB on Chevy chassis is my RV