Ahhhhhh....Ok. So lets say if stock is +34mm and there is a 20mm gap from the fender, so the new rims should be offset +14mm if i want it to flush with fender. Correct?Yes, but most cars actually already have positive offset. Very seldom rims are negative offset. So if std offset is say 50 and the rims are inside fenders by 2cm then to bring it more out/aligned with the fender line, then you need to change to offset 30 for the same rim width.
If the stock rims is -34mm and there is 20mm gap, so the new rims offset should be -54mm if want it to flush. Correct??
Ahhhh....I faham now. Now need to check my stock rims is what offset.....What I trying to explain is those days RWD cars will have negative offset. Their wheel base is set further in so they need negative offset to bring the wheels out.
Nowadays as mentioned by bro. 6UE5t, most cars are now positive offset...