Car tyres - can anyone give me an idea of how often to change the tyres of my Nissan Xtrail?

It's a 2004 model, and I live in an area where the roads are sometimes not great.Car tyres - can anyone give me an idea of how often to change the tyres of my Nissan Xtrail?
1st off, tires actually wearout, the best way to extend the life of your tires is through proper maintenance.

a) tire rotations every six months or every other oil change

b) front end alignment check once a year



2nd, your tires have wear marks imbedded in the grooves of the tires that look like raised bars between the grooves of the tread, if these are even with the tread then it is time for new tires.



3rd, if you live in areas that have rough roads, then you might want to check your tires more often.Car tyres - can anyone give me an idea of how often to change the tyres of my Nissan Xtrail?
You have to look at the treaad on your tires. You could probably ask soemone at a tire place and they could tell you.
Your tires life mostly depends on your driving so if your braking heavy and flooring it off the the line then 40k is all you should expect,but under normal condition(driving) the road doesn't really make the difference,you should get 55-70k and they should be effective right to the end..WITH ANY SUV..YOU GOTTA ROTATE.. every other oil change !!!

Gil
dependant on your driving habits and road conditions will affect how often or at what interval you will have to change them at. usually around 3-4 32nds of an inch of tread left is a good time to start to consider new tires. As well as occasionally checking for unusually tire wear, busted beltings or knots forming on the tire.
If your treads are only 3/32 of an inch or less, you need to replace them (driving on normal roads) IF you drive on rough roads then the treads should be minimum of 3/16 of an inch.
you should change them weekly send the old ones to me freight paid and I'll dispose of them for you