Hi there, yeah, no probs! The wheel size/offset limits for your car - because you are lowering it - are 19x8.5J ET48 with 225/35/19 tyres, but because the offset of the wheels you've been offered is ET45, this means that the rims will sit 3mm further out towards your wheel arches, so they would fit, but you would probably need to go for 215/35/19 tyres, so you don't get any rubbing. As these tyres are narrower, it means that less of the surface area of them makes contact with the tarmac, so if you like to exercise your right foot and 'push on' a bit, the handling and turn-in may be impaired somewhat. If you don't have a total need for speed and prefer just to cruise around town, then 215's would most likely be fine for you. You'd probably get away with fitting 225/35/19's, but be prepared for a bit of rubbing, especially if you have a full car. I personally would advise you to go for wheels with no lower an offset than ET48 if they are 19x8.5J (a higher offset would be even better, up to, but no higher than ET54) and stick some 225/35/19' tyres on them. Then the handling will still be good enough for a bit of light right foot exercise! I'm about to pop a set of 19x8.5J's on my car, but the offset is ET50 (so 5mm further in from the wheel arches than the rims you've been offered) and I intend to use 225/35/19 tyres and because my car is lowered slightly, I may still get a little bit of rubbing every now and again, but nothing I won't be able to live with from day to day. It's a lot to take in, I know, ..not sure I understand exactly what I've said myself, but I hope I haven't confused you as much as I confuse ME lol! Hope this helps, Hun
xx