How big of a spare tire can i fit under the truck

I wanna get some 265 duratracs and wanted to know if I should spring for 5 tires and put the extra one where the current spare tire is. Or should I just keep the same spare?

 

I have my 285/70/17 duratrac in my spare slot. Its a tight fit but it works. Ive been off roading also and had no problems. So a 265 should be no problem at all. Do yourself a favor and get the right spare dont mix and match. IMO

 

Thanks for this. I've been putting off upsizing my spare for too long. I'm glad the 285/70/17 will fit in there. I'm just curious what brand tire? I have BFG AT KO2.

 

I have a 265/75r16 spare (same diameter as a 265/70r17 - I kept my 16" spare when I moved to 17" wheels) in the spare tire bay under the bed. So I know both of those sizes fit for sure.

 

I have 285 / 70 / 17 BF Goodrich DuraTrac

 

Did you need to bend or modify anything to get this to fit?

 

I managed to get a 255/85r16 STMAXX under there by pounding the horns back and cutting the exhaust to dump over the axle.

 

My 265/75/16 KO2 fits fine, I bought 5 matching ones because if you have to wheel back in 4wd, you want all tire diameters to match.

Suggestion: Mount your spare with the valve stem down so you can check and fill it easier, and put a locking chain or cable on it too.

 

I have 265/75-16 Cooper ST Maxx under there, and it is very very close to a 32. I had to beat the prongs up into the frame to get the wheel suck against the bottom fo the frame. It barely clears the exhaust shield on one side, and is pretty damn close to the back of the rear diff.

You can also relocate the actual lift mechanism about 1 inch (or less) farther back if needed. Look at the plate where it mounts, and that will show what your option are for new holes.

Another limiting factor can be a hitch receiver to the rear.

 

Suggestion: leave it up so it doesn't get damaged, and do a 5-tire rotation, which is a great time to check pressure all around anyway.

 

Damaged from what? It’s recessed and much less vulnerable than the others. I’ve seen too many faced people boo hooing with their cars on their jacks because their spare is flat because neither they nor their service people didn’t lower the spare to check it.

 

Flying debris and rocks from offroading.

Boo hooing with car jacks sounds like ignorance and lack of preparation.

 

Never had an issue with it, probably will now because we spoke of it

But really, those other 4 side facing stems are much more vulnerable and rarely get hit either.

 

5 tire rotations are great, but not so good with 1 generic steel rim and 4 alloys.

 

Right. I should have added "if you have 5 aftermarket wheels"

 

What if I could prove to you guys that a five tire rotation does nothing for you?

 

At the very least it reduces wear by 20% so I'll take that bet

 

What if you went off-topic?

 

You're on lol. I wrote this several years ago to clear this issue up for a friend:

Basic assumptions:
1. You rotate tires every 10K miles to maximize life
2. Each tire costs $200.00 (just a number and could be + or -)
3. Cross rotate and work in spare for both directions ( I know Toyota says front to back but the math works out the same so either way is fine)
4. Tires are not uni-directional
5. You have a vehicle with a matching spare tire and rim with a TPMS.
6. Each tire has a max 50K tread life
7. You like the brand and type of tire you have and will stick with it.
8. You drive 20K miles (or more) a year.

Okay. So you have a brand new vehicle with good 50K tires, unlike the stock tires we all have (had) to begin with.

In a 4 tire rotation, you will rotate the tires 4 times and buy a new set at 50K for $800.00. You will have 4 worn out tires. Your spare will still be new and you could replace your spare with a new one and use the spare in with the new set to keep shelf life on spare optimal.

In a 5 tire rotation you will rotate tires 5 times and at 60K you will have 4 worn out tires and your original spare will have 10K miles left. Following the rules above you buy 5 new tires for a cost of $1000.00

So, if you are a 5 tire rotator (lol) you got 10K extra miles out of the set but at a cost of $200.00. You COULD keep the 10K tire for a spare and go to a future 4 tire rotation and save $200.00 but you now have an almost worn out spare that is showing some age. If you buy 5 tires and go back through the process you save no money.

The conclusion to all this is simple: Both ways are fine to use but there is no savings doing it either way. Also notice I put a spare with the same rim and TPMS under the back to make it apples to apples. If you have to either have a shop dismount and remount a tire every rotation or you purchase an additional rim with TPMS up front you are losing money. FWIW I do a 4 tire rotation. If you trade the vehicle sometime, or go to a different type or size of tire, or have to replace one due to damage then this negates any savings as well. So, the 5 tire change is no more economical as a 4 tire rotation in the long run. Sure you go 20% longer maybe but you spend 20% more. It's up to you.

 

Then it would be like 99% of all the threads here...