So, I had a flat on my new to me 03 FX4. While at the shop, I noticed that my back tires are cupping ... The truck only has 21K miles ...

So, any reccommendation on what to replace the stock Rancho's with? Should I get another set of Rancho's, or is there something else out there better? If I get the stock Rancho's what are the part numbers? Any good places to buy it from? I am of the attitude, if the rears are bad, then I will replace all 4 at the same time.

The truck will not see heavy off road driving. It will see the fire trail and snow use though. It will also carry a load in the bed.

Thanks!

Anthony

 

What tires are you running? I usually run either BF Goodrich AT KO's, or ProComp's AT and with both, if you don't rotate regulary, you will get cupping. If you let it go too far and then rotate, you will get additional noise and vibration for a little bit until they wear the cupping down.

 

Tires are stock Wrangler RTS ...


Maybe the previous owner did not rotate often enough, but I was under the impression, a bad strut/shock would cause cupping. I did not realize that failing to rotate could cause it.

Thanks!
Anthony

 

Yes a bad strut or shock can, but unless you feel the bounce, then it is more likely to be no rotating. The more aggressive the tread, the more you will have to rotate. Mudders more the AT's and so on. Contact a local 4x4 shop. You can probably just take your truck to them for a quick check that usually doesn't cost anything. That way you can have peice of mind and a second opinion.

 

I do feel the bounce from time to time. I will swing by a local shop and have them check it out and to see what I can do to find good replacements for the stock Rancho's.

Thanks!
Anthony

 

Just buy shocks from Rancho or some other manufacturer. DONT buy them from ford. The shocks are just Ranch BRANDED shocks Not really ranchos. try belstien or something.