okay, so this may sound dumb, but I don't know anything about this topic......I'm going to put 20's on my truck w/ 33x12.5 mud tires. Would that kind of a spare fit underneath, and if so, what kind of wheel would you mount the spare tire on? If I didn't do this setup underneath and got a flat, would I be able to run 20" wheels and put on the stock 17" spare wheel/tire and make it a few miles to the tire store or would that damage something?

 

The difference is 33 inch tall to 30 inch tall. Rim size does not matter. If you put it on the front (moving the front to the rear if it was a rear that blew) you could drive it legally, safely, but not happily, for any reasonable distance at reasonable speeds. Keep it down around 50, be careful in turns. Expect it to wander a bit. Not a big thing. No damage would occur in say 100-300 miles. Drive it long enough and you will start scrapping or scuffing a tire. Again, a 100 mile at 50 would be no problem.

If you have an open rear end, non limited (posi) then you could put it on the back for the same distance/speed. The lousy handling would be the big thing.
If you have a stock limited, I would put it on the front only.
If you had a locking rear (not stock, you would have added that) it could screw up the rear pretty fast if you put a 30 on one side and a 33 on the other.

Treat it just like you were using one of those little emergancy tires on a car.
Chris

 

This one is a hard nut to crack, I tried several stores today (Walmart, AZ, AAP, etc) looking for various things and all had different brands, all cig lighter models. Will try PepBoys tomorrow...

 

Finally got to a Pep Boys, they only had the 1040 model, which is your basic cig lighter model.

They did have a M45, which is a heavy duty combo with light...looks pretty good and is rechargeable with AC or 12v power, not sure exactly how it works other than it has a rechargeble battery, and can't find much on the net other than this link...

Ended Ebay Auction
http://cgi.ebay.com/ebaymotors/MASTE...QQcmdZViewItem

And this...


Still it's a cig lighter model and I can't find any specs are far as lpm, but on the box it says 1500 ci per minute...that must convert somehow.

Anybody seen or using the M45??

EDIT - 1500 ci converts to aprox. 25 liters, so I assume that would be 25 liters per minute, which is only 1/3 of what the 1050 will do (75 lpm). I guess I will have to go the ebay or amazon route (amazon has free shipping).