Hello all,
I am a pround new owner of a 92 F150 supercab "Nite". I was very happy to find this site. I have been searching the posts have found it to been very helpful.
Thanks to all!
Now to my question.
I need new tires. I would like to go with the stock tire size 235/75/15. I also like the BFGoodrich AT tires but, as you should know firestone makes bad tires so all tire brands are out of that size.

Does anyone know of a source for 235/75/15 BFgoodrich AT Tires or others?
If not what other sizes could I put on my truck?

Thanks

Doug

 

Summit Racing Equipment or Tyres International should have what you are looking for. Also, the largest size I would recommend on that particular truck is 31x10.50R15 with good clearance.

 

Doug -

I too have a '92 Supercab. I HIGHLY recommend you go to the following size: P265/70-R15. The previous owner put Dunlop Rover Touring LT's in this size on my truck and I think they look great! In fact, the 265/70-15 was the largest 15" size available in that particlar brand of tire. They look more substantial than stock without looking too radical. See photo links below to see how they look. Sorry the photos are not very good.
http://albums.photopoint.com/j/View?u=1161757&a=8543466&p=27689438
http://albums.photopoint.com/j/View?u=1161757&a=8543466&p=27969254

 

[font size="1" color="#FF0000"]LAST EDITED ON 06-Oct-00 AT 10:56 AM (EST)[/font][p]Thanks Eric,
Nice Truck!


How does your truck ride with the wider tires? Any adverse effects? I have had wider tire on other trucks and the just didn’t drive right. But then again the other trucks weren't as big as this one. Snow traction is important to me. I have read that wider tires will down grade snow traction.
It this true?
Also does this size tire change the gear ratio?

Thanks Again

Doug

 

[font size="1" color="#FF0000"]LAST EDITED ON 06-Oct-00 AT 11:25 PM (EST)[/font][p]Doug- Thanks for the accolades! I think the truck drives OK with the wider tires. But I only recently bought it, so I don't know how it would be with the stock size.

You are correct regarding snow traction, but I think the improvement in handling and braking in the dry more than offsets the slight detriment to snow traction. Just my opinion, I live in Virginia and don't see much serious snow. Tire/tread design, tread depth, and tire pressure will have more influence on snow traction than a 5% change in aspect ratio...

As far as drive ratio, I did the math, and the outside diameter of the stock 235/75-15 tire is 28.88 inches whereas the 265/70-15 is 29.6 inches, a 2.5% difference. Since the perimeter of the tire is a linear funtion of diameter (perimeter = Pi X D), then we can assume the distance traveled in one revolution of the tire, and thus the gearing, are also 2.5% different. In other words, since the 265/70 is 2.5% larger diameter, your speedometer will read 2.5% slower and your effective final drive ratio will drop by 2.5%. Which is the same as changing my current 3.55 rear differential into a 3.46. Not a significant change, IMHO. Also - be aware that the variation in diameter among different brands of the same numerical size can be as much as or greater than +/- 2.5%!

Also out there is the 275/60-15 (BFG Comp T/A HR4), but that only calculates to a 27.99 inch outside diameter, which will effectively increase your drive ratio compared to stock, speeding things up a bit and hurting your mpg a little. i don't know how well they'll squeeze onto the stock rims though...

 

the 275/60r-15's will fit stogk rims without a problem. I had them on a 90 model F150 regular cab shortbed. The ones I had were Hoosier Radial GT's. I wish I could find another set of them. they held the road excellent and wore really good.

Brad

 

http://www.dougshome.com/f150sig.jpg