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Compact Space Saver Tire/Wheel Solution
- Thread starter JST
- Start date
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- Tags
- Driving Dynamics Model S
FMinMI
Member
Yes it matters. You cannot use a 5 x 114.3 - it must be 5 x 120. You cannot drill out a rim to change its bolt pattern size. Sorry.
FMinMI
Member
Yes, the M3 is different than the MX and MS. Since we are in the MS forum, I assumed he wants it to fit the MS...
FMinMI
Member
Maybe you can buy it, then sell it on the M3 forum for enough money to then buy a new BMW rim and tire that will fit your MS
Good luck!
The person I had replied to said that the 2007 Ford Escape Hyb. spare would work on a Model S. But, I looked up that bolt pattern and it is not the same as the Model S (5X120). The BMW X3 and X5 compact spares are the correct bolt pattern.
Thanks for the info JST.
My setup consists of an X5 18x5 spare wheel with a Continental 145/85R18 CST 17 tire from a 2018 VW Tiguan. I was looking for an older Tiguan 145/80R18 as suggested in this thread and stumbled onto the newer version which matches the overall diameter of the stock wheels at 27.7". The tire is load rated to 1929lbs and you can currently get it at Tirerack for $113. I found my spare with tire on Ebay for $70 shipped. ESC Tuning currently sells the X5 spare wheel for $83 with free shipping.
It fits on both front and rear on my 6/2016 Model S with two calipers in the rear.
Front:
Rear:
My setup consists of an X5 18x5 spare wheel with a Continental 145/85R18 CST 17 tire from a 2018 VW Tiguan. I was looking for an older Tiguan 145/80R18 as suggested in this thread and stumbled onto the newer version which matches the overall diameter of the stock wheels at 27.7". The tire is load rated to 1929lbs and you can currently get it at Tirerack for $113. I found my spare with tire on Ebay for $70 shipped. ESC Tuning currently sells the X5 spare wheel for $83 with free shipping.
It fits on both front and rear on my 6/2016 Model S with two calipers in the rear.
Front:
Rear:
I also wonder if anyone experimented with 155/85/18 as it is also an easy to find size.
245/45/19 vs 155/85/18
Diameter is 704 vs 721 mm (+17mm) (Maybe rubs?)
Revs are 453 vs 442 revs per km (11 less)
Speedometer difference would be around %2.45
While 245/45/19 vs 145/80/18
Diameter is 704 vs 688 mm (-16mm)
Revs are 453 vs 462 revs per km (9 more)
Speedometer difference would be around %2.22
and
245/45/19 vs 155/80/18
Diameter is 704 vs 706 (+2mm)
Revs are 453 vs 452 revs per km (1 less)
Speedometer difference would be only %0.33
So 155/80/18 looks like the best option but it is not possible to find here..
And 145/80/18 looks like out of stock in only 1 webstore. The other tire sellers don't even list it.
While 155/85/18 is wider than 155/80/18. But the difference % is almost same, just on the opposite direction.
So I wonder..
245/45/19 vs 155/85/18
Diameter is 704 vs 721 mm (+17mm) (Maybe rubs?)
Revs are 453 vs 442 revs per km (11 less)
Speedometer difference would be around %2.45
While 245/45/19 vs 145/80/18
Diameter is 704 vs 688 mm (-16mm)
Revs are 453 vs 462 revs per km (9 more)
Speedometer difference would be around %2.22
and
245/45/19 vs 155/80/18
Diameter is 704 vs 706 (+2mm)
Revs are 453 vs 452 revs per km (1 less)
Speedometer difference would be only %0.33
So 155/80/18 looks like the best option but it is not possible to find here..
And 145/80/18 looks like out of stock in only 1 webstore. The other tire sellers don't even list it.
While 155/85/18 is wider than 155/80/18. But the difference % is almost same, just on the opposite direction.
So I wonder..
BigNick
Infamous Fat Sweaty Guy
Would something as skinny as a 145-width tire have the proper load capacity for a car as heavy as a Tesla?
FMinMI
Member
I thought all tires have their max weight limit stamped on the tire. Compare that tire's rating to the tires on your car now...
BigNick
Infamous Fat Sweaty Guy
So it looks like the photo a few posts above has a 103 on it for load rating, higher than the 96 (front) and 101 (rear) on my car. More durable in terms of load rating than I would have thought BUT a greatly reduced 50 MPH max speed rating.
Perhaps that is how the load index can be so high?
FMinMI
Member
Don't know - I had no experience in the tire industry. But I have never seen a donut spare show anything but a 50 MPH limit...
This is awesome! Is this one of those spooky "you inflate it when you need it" spares or is it fully inflated when you store it? How do you intend to store it in the car? Whenever I'm lugging something big and heavy I'm always nervous that I'm going to slam on the brakes and have the thing fly through the back of the car and through my head....
Is this one of those spooky "you inflate it when you need it" spares or is it fully inflated when you store it? How do you intend to store it in the car? Whenever I'm lugging something big and heavy I'm always nervous that I'm going to slam on the brakes and have the thing fly through the back of the car and through my head....[/QUOTE said:
My 2003 allroad has a funky inflatable spare and a compressor; I'm not sure if the package would be small enough to put in a more convenient / safer location if you can squish the tire down to a little bit more than the diameter of the wheel by itself.
looks like this:
https://i.ebayimg.com/images/g/bcAAAOSwqpVbstYZ/s-l1600.jpg
looks like this:
https://i.ebayimg.com/images/g/bcAAAOSwqpVbstYZ/s-l1600.jpg
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