QUOTE(Azuma-kun @ Jul 23 2008, 11:15 PM)
Do we need to rotate the tyre if the 2 front tyres is newer than rear tyres?
for your case is not advisable..
let's put in this way.. by right, the car was started from 4 new tyres.. every around 10,000km ~20,000km (depend ur driving attitude), you should rotating the 4 typres. your car tyres will haus almost equally and the time for change tyres will take longer period. When really need to change, change it by 4 together. By doing so, your car will more safer when braking. As all the 4 tyres is perfoming their grid equally.
in summary,
- recommend to change 4 tyres together
- recommend to use same brand and same model for 4 tpres (don't mix)
- if found any one of tyre bunga is botak to a side, it ether you always conner to fast or the camber setting is out; you need tyre shop to adjust back (expensive) (some of car never adjust camber before, they will ask u to change the adjustable camber screw, so that they able to adjust the camber. it is quite expensive also)
- when driving more than 80km/h, you feel the steering shaking, you need tyre shop to do balancing. (not expensive)
- when driving around 60km/h on wide straight road, you release your hand on steering, the car immediately run to a side / the car is running straight line but your steering is not on middle position; you need tyre shop to do alignment.
If none of sympton on above, everything seem ok, then save your $ for balancing, adjust camber and alignment. The tyre shop like to appoarch whenever you visit them.

hope i cover most of info on tyre based on my knowledge.

exuse on my english ya..
This post has been edited by kentcp: Jul 24 2008, 12:06 AM