I have done this exact same thing (195 on front and 205 on rear) without any problems on my '98 which has ABS. I had a pair of snows from my CTS leftover and bought a new pair for the '98 to use on the rear. I believe it takes more than a small differential in speed to trigger the ABS system on these cars and they tolerate it just fine.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz