[Elethiel]

What do you think, which profile suits and looks the best on 15'' alloys with or without lowering?

 

[Danny]

195/50 R15 or 195/45

45s look a bit better, but give a harsher ride and are more expensive.
50 is closest to standard overall size so your speedo stays right.

 

[Elethiel]

with 30-40 mm lowering?

 

[Danny]

Eithers fine if the wheels are the right offset.

 

[Elethiel]

that's the mysterious question... cause the front springs are upper than the rear,5-10mm.

 

[Vegas]

What does that have to do with tyres sizes

 

[Elethiel]

actually worried about how does that effecting the drive, and height of the car.

 

[Mibo]

The difference between 45 and 50 size tires to rude height isn't even noticeable. Millimeters is all. 45 just look better

 

[Elethiel]

Yeah, but the tyre size now is 70mm not 50 or 45. from 70 to 50/45mm a bigger change isn't it?

 

[Sam]

The measurements are percentages not mm

 

[Mibo]

It will change the ride height if the car but only minimal. Probably not even noticeable. I would go to 50s with 15s

 

[benb404]

Your 'profile' (Aspect Ratio) is a percentage of the tire width. E.g. 200/50 would mean 200mm width of the tire and the profile would be 100mm. (50% of 200mm).

The difference between 45 and 50 for 195mm will be just less of 10mm if my maths is correct... This shouldn't make any difference to tire/arch gap only ride height.

http://www.thetirechoice.com/learning-center/how-to-read-tire-size.aspx