Stock spare ok to use for short travel?

bobbobobbo

Junior Member
Joined
Mar 14, 2016
Posts
10
Reaction score
0
Ram Year
2016
Engine
5.7
I see everyone ask how to get a bigger spare underneath, or bed mounted spares, etc.

Technically, can I use the stock spare to limp to the nearest garage? Or how far could I go, if I were somewhat near home?

My current tire size is 285/75R-17 which are about the height of a 35, but not the width. 2016 Ram 1500 sport, stock spare underneath.

I don't plan to use 4wd ever with a spare. I see small cars limp around with a tiny donut much smaller in diameter, not sure if the similar scenario it would hurt my ram.

Also if I should swap to back if it's a front tire blown, etc.
 

caulk04

Senior Member
Joined
Mar 24, 2013
Posts
528
Reaction score
627
Ram Year
2018
Engine
5.7 Hemi
As long as you don't have a limited slip rear end. In which case, you'd need to do some swap-a-rooney action to get the spare on the front of you had a rear flat.
 

LugsLeadOut84

Senior Member
Joined
Nov 13, 2018
Posts
378
Reaction score
522
Location
NYC Suburb
Ram Year
2021
Engine
5.7L Hemi
It's simple....Use it to get you back on the road and replace it as soon as possible. The size is close enough.
I think those looking for bigger spares are running considerably larger tires and/or are preparing for a flat when off-roading.
 

bobbobobbo

Junior Member
Joined
Mar 14, 2016
Posts
10
Reaction score
0
Ram Year
2016
Engine
5.7
Got it.

- I do have a limited slip rear, yes. So I should swap it to the front if so, even though that's my drive tire?

- Right, it's just the diameter of my tire is still quite a bit larger than stock, so I wasn't sure how far I'd be able to limp it back. As sometimes I travel out a bit far on the highway.

Just gathering knowledge for the future if this ever happens, thank you.
 

GTyankee

Senior Member
Supporting Member
Military
Joined
Nov 2, 2020
Posts
3,875
Reaction score
4,631
Location
El Cajon Calif. 92021
Ram Year
2016
Engine
3.0 ecodiesel
OFF Pavement you would want to keep your speed down when using a temporary spare
ON pavement , on the side of the spare, i think the speed is on the sidewall

When was the last time that the air pressure was checked on the spare ?

If i was off roading, i would have a full sized spare in the bed
People forget, what happens when your crossing an area & have a flat & you can't get the spare out from under the vehicle
 

caulk04

Senior Member
Joined
Mar 24, 2013
Posts
528
Reaction score
627
Ram Year
2018
Engine
5.7 Hemi
Putting different tire sizes on the front won't cause any hard part issue because the front axle disconnects and has an open diff anyway.

On the rear with an LSD, the mismatch in axle RPM from side to side will likely cause it to try to correct the issue as if you're losing traction...accelerated wear.
 

bobbobobbo

Junior Member
Joined
Mar 14, 2016
Posts
10
Reaction score
0
Ram Year
2016
Engine
5.7
Thank you all. This is helpful. Many on here have oversized tires, yet don't plan for what could happen if one blows.

Putting different tire sizes on the front won't cause any hard part issue because the front axle disconnects and has an open diff anyway.

On the rear with an LSD, the mismatch in axle RPM from side to side will likely cause it to try to correct the issue as if you're losing traction...accelerated wear.
Got it. So the front, I could limp home at any distance, keeping the speed down as it's still a spare tire. And it's the steering tires.

On the back, it would wear pretty.. as it would be constantly thinking it's losing traction. How many miles would be too many?


Again the true diameter difference of my current tire, and the spare, would be 31" to my current 34". So 3" diameter difference.
 

Tim7139

Senior Member
Joined
Oct 24, 2015
Posts
621
Reaction score
215
Location
Alberta, Canada
Ram Year
2020 Classic ST Crew 4x4
Engine
5.7 Hemi w/8 speed 3.92 gears
Got it. So the front, I could limp home at any distance, keeping the speed down as it's still a spare tire. And it's the steering tires.

On the back, it would wear pretty.. as it would be constantly thinking it's losing traction. How many miles would be too many?
The full size spare is a real tire on a real rim, so no limit on distance and speed. Fun fact it's the rim and tire are the ones you get on the base and SSV models.

If your spare is a different size than the other steer tire you will notice the vehicle pulling to one side, which gets worse under braking. I'd do a few panic stops and gauge my own comfort level. Extended driving (more than a tank of gas) increases the chance of uneaven wear on brake and suspension components.

I'd drive a mile or two with one mismatches tires on the rear on to get to safety, but I don't think the risk reward justifies trying to go much further without very frequent stops to cool down the pumpkin as it starts to build heat quite quickly.
 

Elvira

Senior Member
Joined
Aug 11, 2018
Posts
130
Reaction score
110
Location
Canada
Ram Year
2015 Reg Cab Short Box
Engine
Hemi 5.7
Those spares are designed to get you off the hwy and to a place for tire repair. You would be fine leaving it on the rear, if that is the flat location, for a short driving distance at a limited speed. It wouldn't make sense to jack up both ends to make sure spare was on the front because of limited slip...personally I would not want the spare on the front anyways. The limited slip diff's are built to accommodate the spare if needed...those spares are very close to exact size as rest of the tires, unless you have installed larger than oem off road tires.
 

Badger 13

Senior Member
Joined
Jul 30, 2018
Posts
807
Reaction score
638
Location
North Idaho
Ram Year
2013 Dodge Ram 1500
Engine
5.7 Hemi
My 2013 had the "temporary" spare tire & wheel. I'm not a fan of using a "temporary" spare tire. I found a steel wheel and mounted the same size tire tire my truck has on it. It fits just fine in the spare tire location. It is just a nice piece of mind having a "real" spare tire.
 
Top