I replaced these rims with SSR Type-X rims, which are 15x7, with 205/50 R15 tyres, and the handling has improved, and so has the grip. However, when going over bumpy roads and speed bumps, I hear a rubbing/screeching sound from the front, so I'm assuming it's because the front tyres are touching the fender as they're wider and have an offset of +35.
Please see the pictures for reference.
Front with old wheel:

Front with new wheel:

Front with new wheel, viewed from above:

Rear with old wheel:

Rear with new wheel:

Does this mean I need to have my front fenders rolled? Where can I get it done at a proper price?