Just took delivery of our 2013 328xi. Reviewing the manual it indicates max speed/miles on a flat RFT is 50 mph/50 miles (the latter for an average load).
It is my impression that RFT's are less available than regular tires and one would likely need to order a replacement (especially a replacement matching the brand/series of the other tires on the vehicle).
So, what's the strategy for a trip where you don't want to risk being stranded somewhere waiting for any of the tire outlets within 50 miles to have to order a replacement in, not having any in stock? My first (and so far only) thought is to use a flat tire sealant. Do these work reasonably well and could one reasonably depend on it to last for, say, several hundred miles (where your next planned stop is and you can ordered ahead so a replacement is waiting for you)?
Somewhat related, in case you have to replace one tire, is there a need to replace others so that diameters are matched? I've read that the AWD systems on some cars require tire diameters to be very closely matched so avoid the system trying to continually transfer torque due thinking a tire is slipping due to wheel speed variation resulted from mismatched tire diameters (and I'm talking here about a diameter mismatch due to tire wear, not due to fitting a brand/series of replacement different than on the other wheels).
It is my impression that RFT's are less available than regular tires and one would likely need to order a replacement (especially a replacement matching the brand/series of the other tires on the vehicle).
So, what's the strategy for a trip where you don't want to risk being stranded somewhere waiting for any of the tire outlets within 50 miles to have to order a replacement in, not having any in stock? My first (and so far only) thought is to use a flat tire sealant. Do these work reasonably well and could one reasonably depend on it to last for, say, several hundred miles (where your next planned stop is and you can ordered ahead so a replacement is waiting for you)?
Somewhat related, in case you have to replace one tire, is there a need to replace others so that diameters are matched? I've read that the AWD systems on some cars require tire diameters to be very closely matched so avoid the system trying to continually transfer torque due thinking a tire is slipping due to wheel speed variation resulted from mismatched tire diameters (and I'm talking here about a diameter mismatch due to tire wear, not due to fitting a brand/series of replacement different than on the other wheels).