[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: Quattro & spare tyre

Hairy green toads from Mars made Benjawan Kuecharoenwong say:

> 	I read in Complete Car4	 Mag. that one Opel 4X4 owner 
> just change the
> rear tyres (with the same size with the fronts) ,after that the 
> transmission gone (because of slightly differrence in radius between
> front tyres and rear tyres.
> 	My car's tyres are 235/45-17 ,but the spare is 215/60-15 .
>  Is it safe to use this spare tyre (for emergency only)  ?
>  or I have to buy one set of 17" wheel to be a spare.

According to Mark Sirota's tire_size program:

Specification  Sidewall  Radius  Diameter  Circumference  Revs/Mile  Difference
235/45-17         4.2in  12.7in    25.3in         79.6in        796        0.0%
215/60-15         5.1in  12.6in    25.2in         79.0in        802       -0.7%

So, the spare has just about the same rolling circumference as the
regular tire; it should be OK.

If the 15" wheel physically fits on the car (clears brakes, struts, etc.),
then you are fine.


Andrew L. Duane (JOT-7)			duane@zk3.dec.com
Digital Equipment Corporation		(603)-881-1294
110 Spit Brook Road			http://www.zk3.dec.com/~duane
M/S ZKO3-3/U14
Nashua, NH    03062-2698

Only my cat shares my opinions, and she's too heavy to care.