245 -45-20 good size for my X5

[TiAgX5]

If you want actual tire diameters and cannot understand the formula to calculate them, go on TireRack.com, find your tires, then click the "SPECS". Tape measure doesn't come close (wear, pressure, vehicle weight,.......that's just 3 variables off the top of my head). What is the load/speed rating on the GY ultra grips?

[love2speed]

I hear you..again I'm not looking to run my x in the Indy or baja I just want to dress it up inexspensivley given it age and I thought this might be the way to go but i got conflicting info from my post some say ok, others say stay clear

[TiAgX5]

I am not talking about speeds run at indy, there are FIVE DOT approved speed ratings that are for tires that are not to exceed 100mph! Your the one with the "love 2speed" ID. What's your tires speed rating speedy?

[love2speed]

Ok So I went to a tire diameter calculator and I get it now...as it turns out he 20's are going to be a little smaller then the ones I have on now, which defeated my purpose. I'm looking for a package that fills he wheel wells to make the truck look more sporty.

Again thanks for the info buddy

[TiAgX5]

No problem. Those Cadillac wheels may be overloaded on your loaded X5, even with a high speed rated tire.

[TiAgX5]

Another thing to consider is the fact that a tires top speed rating no longer applies after a puncture. A good rule af thumb is, after patching, the tire drops one speed classification, that's why I put Ws (168mph) in place of my Vs (149mph). A high speed run is no time to be thinking about if a patched tire is going to $hit the bed!