[Shop-talk] Maximum speed with a limited use spare

[Steven Trovato]

Always wondered about the "limited use" spares that say to use for a 
maximum of 50 miles.  When you're done, do you put it back in your 
trunk and it's good for another 50 miles?  Is it just a matter of 
letting it cool down, or do they think the thing is consumed and 
needs to be replaced at that point?  Or maybe they are saying that 
your car can probably handle 50 miles of mismatched sizes before the 
differential or whatever fails.

-Steve Trovato
strovato at optonline.net