What size bolts do i need for my E34?

[szacsi72]

Hey guys, so I am planning on buying 15mm spacers for the front and 20mm for the rear, but i do not know what size bolts i need (because i do not know the original size.)
Can anyone help me out?

[TostitoBandito]

https://www.turnermotorsport.com/p-3...w-mini/?pdk=AQ

You want M12x1.5 bolts. At that link you can get custom length bolts for both front and rear for your car (sets of 10 for one axle for around $25-30). You'll want longer bolts for the rear to accomodate the thicker spacers, so you'll need to make sure not to mix them up when you take wheels off.

Alternatively, you could do wheel studs. 90mm studs would be needed for both front and rear for your car. I use the Apex studs and like them. The advantage of studs in addition to convenience is that if you choose to change spacer sizes in the future you probably won't need to change your studs, but if you had bolts you'd need to buy new ones.

[Jim@tirerack]

I agree with going to a stud kit. Changing tires on the BMW's with the bolts is a hassle. Add in spacers and it is going to be even harder.