One thing I noticed sir when upgrading rims, probably it is better to get bigger sizes specially if you are driving a large car like an Innova. The load rating of most aftermarket 15" rims are quite weak. Most run around 600 to 650kg/wheel. The bigger the size, the better it can handle load. Upon checking some random rims from Rota sized 17 to 18, they run aroud 650 to 690kg. Try to check if the rims you are eyeing for can handle the weight of the car plus your passengers.

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One thing I noticed sir when upgrading rims, probably it is better to get bigger sizes specially if you are driving a large car like an Innova. The load rating of most aftermarket 15" rims are quite weak. Most run around 600 to 650kg/wheel. The bigger the size, the better it can handle load. Upon checking some random rims from Rota sized 17 to 18, they run aroud 650 to 690kg. Try to check if the rims you are eyeing for can handle the weight of the car plus your passengers.