alternative tires to replace the ML320's temporary spare
"how to get home fast"
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| I have had a blown tire during my first Baja California test drive in 1997 - 500 miles away from any source for new tires. Installing the temp spare was no fun at all. Since I did not want to drive on that mountain bike tire (aka MB spare) at mountain bike speeds I had a used tire for $20 mounted.
The used tire allowed for decent highway speeds and got me home quick and safe.
After the trip I threw that tire away and replaced it with a new one. Eventually I upgraded to a much more reliable off-rad tire.
The Mexican "tire shop" I got the replacement from had an inventory of about 45 used tires to chose from.
Nothing that would fit the ML insisted the owner of the "shop". But he had his mind set only at 255/65R16. But some other configurations have a similar diameter as the 255/65.
I picked a tire that I figured would do just fine: 245/70 R 16 |
Here the quick math:
sidewall height of a 255/65 tire is 65% of 255mm tire width or roughly 166mm
sidewall height of a 245/70 tire is 70% of 245mm tire width or roughly 172mm
166mm vs 172mm or 6.53" vs 6.75" is a decent match.
Check here for quick math vs real tire size
DO NOT use tires with diameters larger than the ones listed below. Two significantly different tire sizes on one axle will eventually destroy the axle's differential. A single replacement tire at least10% larger than the other 3 tires could get 4ETS confused and render the vehicle inoperable.
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| Here are some other sizes that could temporarily replace a damaged 16 inch stock tire or the 155/90R18 spare: |
| tire size |
diameter |
difference to stock size |
|
| 205/80 R 16 * |
28.07" |
- 1.2 % |
|
| 215/70 R 16 *** |
26.96" |
- 5.5 % |
very small diameter - inflate to 40 psi |
| 215/80 R 16 * |
28.70 |
- 1.1 % |
|
| 225/70 R 16 ** |
27.73" |
- 2.4 % |
|
| 205 R 16 * |
28.13 " |
- 0.9 % |
|
| 235/70 R 16 * |
27.98" |
- 1.5 % |
|
| 225/75 R 16 |
28.39 " |
0.0 |
stock on ML230 and non US ML320 |
| 255/65 R 16 |
28.39 " |
0.0 |
stock tire size on US ML320 |
| 6.50 R 16 * |
28.36 " |
+ 0.1 % |
|
| 215/80 R 16 * |
28.70 " |
+1.1 % |
|
| 245/70 R 16 * |
28.55" |
+ 0.6 % |
|
| 215/85 R 16 *** |
29.45" |
3.7 % |
larger diameter - inflate to 25 psi |
| 245/75 R 16 *** |
29.46" |
3.8 % |
larger diameter - inflate to 25 psi |
| 255/70 R 16 ** |
29.19" |
2.8% |
|
| 265/70 R 16 *** |
29.59" |
4.2 % |
larger diameter - inflate to 25 psi |
| 265/75 R 16 *** |
30.72 " |
+ 7.8 % |
larger diameter - inflate to 25 psi |
| 275/65 R 16 ** |
29.19 " |
2.8 % |
|
| 285/65 R 16 ** |
29.14 " |
2.7 % |
|
| 285/70 R 16 *** |
29.51 " |
4.0 % |
larger diameter - inflate to 25 psi |
| 7.00 R 16 *** |
29.74 " |
4.7 % |
larger diameter - inflate to 25 psi |
*= perfect match ** = very good match ***= decent match
| To keep 4ETS from acting up DO NOT mount larger replacement tires than listed here. |
Caution:
A single used tire of a different size is only intended to be a cheap temporary fix.
Replace any temporary spare as soon as possible with a perfect match. |
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