I put snoways era on the front of my saab after 21000 miles coming up to winter 2009 and I have never used anything else when they are about 5 mm they go on the back and I put a new pair on the front.
The car has 171000 on it now ,it has snoways all round averages 37 to 38 mpg and I always see at least 50000 miles out of a pair .
These are pretty good tyres and they have often seen me home through deepest snow a foot deep on the final stretch of my journey ,I live in the countryside and snowploughs come around days late.i have driven many miles in my life 500 000 plus on one mercedes alone
In the eighties we had vredestein snow plus they were good but noisy , for the price the quality lassa are jolly good tyres