To all sifu, my Nissan Sentra is now using all 4 pirelli tyres which is around 4 years in age. I can notice that there are like tiny crack in the surface of the tyre due to ageing i suppose.

I went to check the tyre and the guy there told me it is still functional and ok but depend on whether i wanna change all 4 of them or not. What do you guys think?

Furthermore, they have also found that 1 of my sport rims is faulty ( In cantonese it is called 'kop' ) meaning like the shape is no longer like a circle, but an oval instead. They ask me whether i want to change or not, but in the mean time, they put that rim at the back of the car. So should i change it all 4 rims?

4 years should change all 4 tires already especially when you can see cracks

rim no need change, get it repaired + re-balance.
then do proper tire/rim balancing on all 4 wheels

"kuk", as in bengkok, bent, btw

THank you for your suggestion WIll really consider change all tyre already So i just go to a tyre shop and ask them to repair that rim?

welcome.
yes. +/- rm50 or so per rim.

looks like time for me to change my tires also,4 1/2 yrs di

Ori stock rims is much durable & bullet proof.
Just repair lah.. If due to wanna drive as more pickup then change to lightweight rims for save fuel and power.

Tyres usage up to 4 yrs is consider long period.
If not change also can for Sentra is quite heavy weight and just drive as slowly when in raining season.

But end up you still will change all 4 tyres

THank you for the advice! Yea sentra is quite a heavy car

Becoz current I'm still own the Sentra 03 until now.
If you feel free come to talk here.

https://www.facebook.com/groups/344926425626409/