[plantman77]

Found a good deal on a set of 405m 19" wheels, but they are off a M235i. Offsets are

ET45 235/35-19 front / ET52 255/35-19 rear

stock 400m wheels are

ET34 225/45-18 front / ET47 255/40-18 rear

So I would need a 15mm spacer in the front and 10mm in the rear. Does that sound like it would work. Any other problems with this setup. Thanks

[alohasurftoad]

i'd use 12.5mm spacers for front and rear which would be equivalent offsets of +32.5 front, +39.5 rear. you could also increase the rear spacer to 15mm, for equivalent offset of +37 rear, if you want it more flush. you might consider a stud conversion kit as it makes life much easier to install or remove your wheels.

your existing front wheel gap will increase 1/4" with the 235/35/19. 225/40/19(oem size) would be better up front.

[plantman77]

Originally Posted by alohasurftoad

i'd use 12.5mm spacers for front and rear which would be equivalent offsets of +32.5 front, +39.5 rear. you could also increase the rear spacer to 15mm, for equivalent offset of +37 rear, if you want it more flush. you might consider a stud conversion kit as it makes life much easier to install or remove your wheels.

your existing front wheel gap will increase 1/4" with the 235/35/19. 225/40/19(oem size) would be better up front.

Was worried about the wheel gap. It's already giant considering I have an xdrive model. Might reconsider I know the tire diameters need to be within 1% for xdrive.

[alohasurftoad]

235/35/19 and 255/35/19 is a 2% difference and will likely cause problems with x-drive. in addition to the four spacers, you now have to buy two front tires. reconsidering the purchase is prudent.

i'd say forget it and just get appropriately sized wheels and tires.