Hello all. Im new to the forum and while I am not new to owning a truck I am new to modifying them.

Im pretty mechanically inclined for the most part but somethings I just never learned.

long story short. I Have just purchased a used 2002 F150 XLT supercrew 4X4 truck with 139k on the odometer.

As far as modding it I have already done a bunch of research and going with the Edge EVO CS tuner, CAI and cat back dual flowmaster exhaust.

Those things are to come but first, I want to get rid of the stock crap look rims and tires. It has stock 16 inch rims, no lift.

My question is this, without doing a lift, what is the biggest rim and tire combo I can use without issues? My idea was to put an 18 inch rim with some low profile AT tires on it. I do not do alot of off road driving except to drive into the woods and load up my deer.

Please let me know.

Thank you

 

Don't know if this will help but I just had installed 285/70x17 Firestone Destination tires on my 02's stock FX4 rims and they fit nicely and look great on the truck. they look like what should have come on it. No clearance issues. the stock tires were 265/70x17.

 

Thanks Roadie.

I actually was able to determine what I can do interms of wheel and tire size by using the sticky titled "Calculating Tire Size" using the example below


Let’s use a common stock tire found on the F150:
275x65x18
275 = width in mm
65 = aspect ratio, this is the side wall height as a percentage of the tires width
18” = rim size in inches

To convert this tire to standard units (inches) use the following steps:
(NOTE: I round to the 100th place)
1. Convert the width in mm to inches: 275/25.4 = 10.83" (25.4 mm = 1 inch)
2. Calculate the sidewall height: 10.83 x .65 = 7.04" (don’t forget the decimal as this is a %)
3. Calculate final tire height: (total sidewall = sidewall x 2) 7.04" x 2 = 14.08". Now add your total sidewall height to your rim size, 14.08"+18" = 32.08"

This means a 275x65x18 is ~32.08x10.83x18

In short an 18x9 rim with a 255/55 tire = total size of 29 inches. Stock 16 inch rims with 255/70 tires = 30 inches total size. Most of what I read on a stock non lifted 2002 f150 4x4 you can fit up to a 32 inch total size without any issues and without doing a lift.

So I think Im going to go with the 18x9 /255/55 AT tire like I said i do not do a bunch of off road driving just the old logging trails to load up the deer other then that its all highway with occasional snow when i go north to ride sleds.

 

tirerack.com has the specs for all the tires they sell and that is a big help in determining height, width, etc. What might get you into trouble is the offset of the rims if you go too big.

 

I'd be a bit concerned about clearances with wide 18" tires. You are actually better off with narrower tires in mud and snow. 285/70-17 is probably the best of both worlds.

 

maybe im not following but based on your specs 285/70-17 this is actually 33 inch tire with a 11.22 inch width...

The specs Im considering are 10.03 inch wide which is more narrow.

What am I missing..

 

Please elaborate more about the offset

Describe what it is in relation to the RIM and how it affects performance. I notice when looking at rims some have 10 mm offset some have more some have less. Im not sure what offset is and how it affects the performance

EDIT:
I found out that 2002 F150 came with either a 16 or 17 in rim and they both had a positive offset of either 14 or 15MM.. so would a 10 mm not be enough offset or .. I guess what im trying to ask is when figuring out rims and the offset is it better to run more then factory or less ? which way is going to cause issues?

 

ok so factory tire width is 7or 7.5 inches depending on 16 or 17 inch rim with a factory offset of 15mm..

so if Im going with a 9 inch wide rim with a 10 inch wide tire, then im going to want to swing offset lower to compensate for the bigger width? Am I on the right track? 25.4 mm in 1 inch so i would want to be in the negative range for offset or get spacers?