My 2009 trx4 has a full size spare. 275/65 r17
Hope that helps

 

My 2012 has a full size spare too.

 

Even though the tire on my 2011 looks like a full size tire, its is not. In fact it say for temporary use only. What i did is buy another 20" rim off ebay for $200 and had mounted and balanced with a real tire 275 60 r 20. The only modification you need to make is removing the fake chrome off the rim so the spare tire holder fits through the rim. Once thats done it fits perfectly. Now that I have larger tires (275 65 r20) I need to find out if the 1" larger tire fits underneath...

 

How did you get the chrome clad off???

 

Mine has a full size spare as well. 275/65/20.

 

Guys, you are confusing the two descriptions. All ram trucks come with a full size spare, however they are for temporary use as they don't have the same mileage rating as a standard tire. A doughnut tire is skinny as hell and only serves well for a front runner at the track or nursing your car to the shop.

Yes, the spare tire is mounted on a 17" wheel, that doesn't stop it from being a full sized spare if yours came with a 20" wheel. No truck that comes with 20s has a 20" wheel as a spare unless it comes with a set of big brakes that have a minimum wheel diameter. All factory spare tires are designed to do is get you to a shop, if you want to be able to swap the wheel and not have an ugly assed rim then buy yourself a matching wheel and tire. Oh, and a 35" mud tire doesn't fit under the bed using the winch system. We laugh at Jeep guys that only buy 4 over-sized tires and have a stock sized spare, they'll find out what happens one day.

 

I'm sorry,I should have been more clear when I posted the question. My truck does have a full size spare, but it is a temporary tire, not a "real" tire. My '05 Ram had a real spare tire with the factory 20" rims. Sometime by the time the '10 came out, they changed the spare to a fake tire.

So, has anyone with factory 20" rims swapped the temporary spare for a real tire and not had problems with the TPS system?

Thanks

 

I replaced the temp tire with an LT285/70R17 E (10 ply) tire on that spare 17" rim. The tire is the same diameter as your OEM 20" tire. No need to modify your chrome-clad 20" wheel.

 

I haven't tried it yet, as I haven't found a decent enough rim to use as my spare since I intend to use it full time and do 5 tire rotations.

 

Then I'm guessing cutting down the metal piece could be an option too.