[chirag928]

Im new to the f30 series and need some help if possible. Just bought a 16 340i and got it lowered on H&R Super Sport lowering springs. I just got my Ferreda fr8 wheels in which are 20X9 front and 20X10 rear and i need help on getting the right tires size.. ET 45 front ET 40 Rear

[Billfitz]

http://f30.bimmerpost.com/forums/forumdisplay.php?f=423

[alohasurftoad]

Originally Posted by chirag928

Im new to the f30 series and need some help if possible. Just bought a 16 340i and got it lowered on H&R Super Sport lowering springs. I just got my Ferreda fr8 wheels in which are 20X9 front and 20X10 rear and i need help on getting the right tires size.. ET 45 front ET 40 Rear

you should have consulted the forum before purchasing those wheel sizes/offsets.

since you're slammed on HRSS springs the additional negative camber should help with your rear offset. you may still have to add negative camber and/or run a slight stretch to avoid rub.

the front offset is 10mm more tucked than oem and the additional negative camber will tuck the upper half of the tire even more. the inside tire shoulder may touch the strut mount(top hat). stretched tire may prevent that however it will tuck the outside shoulder/sidewall as well. so you may need a 10mm(ish) spacer, depends on the tire size you choose.

255/30/20, 275/30/20, 26"/26.5", no stretch/no stretch, 0.5"forward rake diameter stagger

235/35/20, 275/30/20, 26.5"/26.5", 20mm stretch/no stretch, level

245/30/20, 265/30/20, 25.8"/26.3", 10mm stretch/10mm stretch, 0.5" forward rake diameter stagger

235/35/20, 265/30/20, 26.5"/26.3", 20mm stretch/10mm stretch, 0.2" reverse rake diameter stagger

255/30/20, 265/30/20, 26"/26.3", no stretch/10mm stretch, 0.3" forward rake diameter stagger. slightly reverse stretch staggered(prolly unoticeable)

285 is possible on 10" however i did not include it as i thought it would rub without additional negative camber

you'll have to play with combinations and see if the sizes are available in the tire choice.

https://tiresize.com/comparison/

[Jonathan46]

So I have a 2014 f30 and it currently sits on 17" 393 starspokes but was wanting to change that out to maybe a
F: 22545zr18
Rear 25540zr18
The would be on
F:18x8or 18x8.5 30 mm offset
R: 18x9or18x9.5 45mm offset
Was also contemplating on the rear maybe a 18x8.5
But I wasn't sure what would be the best set up just either overall or leaning a little more towards better performance any help is appreciated!