5-lug Setup

[robmespeedy]

the whole time i thought the inner diameter of the bearing was different.

[Aptyp]

yes sir, that makes z3 hub fit inside of e30 hub. That's the premise for this write-up.

[robmespeedy]

just realized something. the Z3 I6 and the 87-91 e30 I6 use the same rear wheel bearings.

[Aptyp]

caliper carrier is also different...

[jrdeamicis]

got e36m3 spindles and brakes for all 4 corners today. No I need to wreck my head to figure out how to install rear brakes. I'd like those huge m-calipers and rotors all around.

The rotor spacing is 1 and 1/16th different from an E30 to the E36 Rear rotor.

You need to get rid of the parking brake shield.

[Aptyp]

Thanks again, Rob. I edited my site to reflect these new findings. Still not sure what the difference in hubs or rotors is, but for swappers sake, I'd rather have accurate information...

[robmespeedy]

No, thank you!! for this thread! it has helped me.

[Aptyp]

I'll be spending time with caliper to figure out the difference. They looked one to one to me, maybe there's some subtle difference I've overlooked.

Good observation and addition Robmespeedy, thank you.

[robmespeedy]

^
z3 1.9 hub part #33411095770

318ti hub part #33411095768

they are different.

[robmespeedy]

^
318ti rotor part #34216758552

Z3 1.9 rotor part # 34211164399

Z3 2.5, 3.0 rotor part # 34211164399

[Aptyp]

^ that's where I don't see the logic...

IF

318ti hub = z3 1.9L hub

AND

z3 1.9L Rotor = z3 I6 Rotor

AND all caliper carriers are the same.

AND all brake pads are the same

THEN

318ti Rotor and all z3 rotors should be the same.


There's some monkey business.

[robmespeedy]

if that's the case, then all 318ti and z3 rotors are the same, are they?

BMA shows them to be the same, but my ETK and WorldPAC doesn't. So better safe than sorry. Someone chime in on this issue.

the z3 1.9 and the z3 I6's use the same rotors.

but the 318ti rotors are not the same as the z3's

[Aptyp]

asking the wrong person, but if Massive sells e30m3 rear BBKs then yes, hubs are all you need.

[Lofty]

So let me get this straight. If I plan to use a big brake conversion such a Massive's, all I need is to buy E30 M3 rear hubs. Correct?

[Aptyp]

if that's the case, then all 318ti and z3 rotors are the same, are they?

BMA shows them to be the same, but my ETK and WorldPAC doesn't. So better safe than sorry. Someone chime in on this issue.