I'm thinking of putting larger tires onto my 98 4x4. I was thinking of either 285/75R16 or 305/70R16. What size wheels have you guys tried with these tires? Plus, without a lift, will I have any tire to body contact? Lastly, what needs to be changed to get the speedometer calibrated for the new tire sizes?

Thanks in advance.
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98 XLT Xcab, 4x4, 4.6, Auto. All stock so far

 

Hope you get some good advice, I want to do the same thing. So I will just watch,

 

I have the 285's on my rig with A/R 16X8's Pythons. I up'd the T-Bars aprox 3/4". No probs w/ rubbing. The speedo is a bit off calibration. I have tried to have the PSOM (Speedo computer) recalibrated by the dealership w/out any luck. They couldn't get the Revolutions Per Mile (tire revolution) down to 630 from 694.

Get the 305's. They seem to fill the wheel well a bit more.

Good luck.

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99 4x4 XLT supercab 5.4L Flareside, Deep Wedgewood Blue/Med. Graphite w/Captain Chairs, Pioneer DEP-4000, Tint, K&N, Bedliner, 3" Catback w/3 Chamber Flowmaster, 285/75/16 BFG A/T on American Racing Python wheels, Stull Billet Grill

'00 Expedition XLT, Silver w/Dark graphite interior, 5.4L, Stull Billet Grill and some other stuff. All in all she'll stay stock. Ok, maybe a Flowmaster 50 series soon.

 

Loser1
Let me know if you put the Flowmaster on. I'd like to know how it sounds and performs. That's on the X.

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99 Expedition -XLT-4X4-5.4-17"AT/S- Superchip-Airaid-Polk Speakers-Custom Edlbrock shocks-Rear Swaybar

 

I have the 285's on factory wheels. They look great no rubbing anywhere. I haven't tightened the torsion bars either. This is a common question with quite a bit of info and pictures. Try doing a search. I don't think anybody has had any regrets with the 285's.

 

I just bought a set of 5 star lariat rims (stock 16" x 7" rims) I put 285/75/65 donlup radial rover at's on And It look much better and does not rub anywhere. It handles alot better then it did with stock good years. Lost quite a bit of power, though wish that did not happen it wasn't fast to begin with. As for speedo It is only off by about 3 mph. That is 3mph slower so dont worry about just drive and be careful. 1 good thing I am still under warranty and it will actually slow down mileage a little bit. Any little bit will help.

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1998 F150 XLT extra cab white,4.6 with off-road package
tint,rhino-lining, white face gauges, clear front marker lights, stull billet grille
16" lariat 5 stars with dunlop radial rover
285/75/16