I recently bought a 2018 Tiguan Sportline and am looking at replacing the space saver spare with a full-size wheel as I do some country trips and think taking a full-size wheel is a good insurance policy from getting stranded.
A question for all you wheel/tyre experts out there. What should the difference in diameter of a (space saver) spare be from the stock wheel?
Reason I'm asking is that there's a reasonable size difference from the stock Kapstadt's on the Sportline and the factory supplied space saver and got me wondering if there's any recommended minimum size.
Kapstadt 20x8 ET41 running 235/45R20 - diameter = 719.5mm
Space saver 18x?? running 145/85R18 - diameter = 703.7mm
It's around 2.2% difference which I though was a bit much for something coming from the factory (155/85R18 tyre would be 720.7mm which is a lot closer size).
Also on a related point I was looking to run a 17" wheel as a spare until I also read the section in the manual on spares. Owners manual says that if the tyre on the spare is not the same as the other tyres on the car:
So basically unless you get another matching rim/tyre you can't technically go over 80km/hr. I understand this as if there's different wheels/tyres fitted this can effect the operation of ABS/ESC/TCS.
So what do you do. Go and buy a matching spare, get a non-matching spare and drive carefully or just stick with the space-saver given that the non-matchng spare is going to be speed limited anyway?
A question for all you wheel/tyre experts out there. What should the difference in diameter of a (space saver) spare be from the stock wheel?
Reason I'm asking is that there's a reasonable size difference from the stock Kapstadt's on the Sportline and the factory supplied space saver and got me wondering if there's any recommended minimum size.
Kapstadt 20x8 ET41 running 235/45R20 - diameter = 719.5mm
Space saver 18x?? running 145/85R18 - diameter = 703.7mm
It's around 2.2% difference which I though was a bit much for something coming from the factory (155/85R18 tyre would be 720.7mm which is a lot closer size).
Also on a related point I was looking to run a 17" wheel as a spare until I also read the section in the manual on spares. Owners manual says that if the tyre on the spare is not the same as the other tyres on the car:
- Don't drive faster than 80km/hr,
- Avoid full acceleration, sudden braking or fast driving through bends,
- Don't use snow chains
- Check tyre pressures as soon as possible
So basically unless you get another matching rim/tyre you can't technically go over 80km/hr. I understand this as if there's different wheels/tyres fitted this can effect the operation of ABS/ESC/TCS.
So what do you do. Go and buy a matching spare, get a non-matching spare and drive carefully or just stick with the space-saver given that the non-matchng spare is going to be speed limited anyway?
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