[Tcmcec]

I got a set of 18x9 flow forged wheels that in my opinion stick out slightly too much (about 5mm or so) for my liking (25mm more than factory). The offset on the wheels is +40, hoping to shave off 5mm. I have about 10mm of material on the hub side before I get to the tapered lug seat. From what I see 3-5mm is a very common amount to machine off.

Also another option is to pull the fender slightly by a quarter inch, the flat lip on the fender actually angles in slightly on our cars anyway. I'm wondering if this would help make it look a little wider in the rear like the m2. My body shop says not to do this but it seems pretty common online as some people do it along with a fender roll. Any help and thoughts would be great.

[cxp213]

Just curious, but where would you go to get your wheel machined so that the offset is higher (less aggressive)? How much does this cost?

[Tcmcec]

Originally Posted by cxp213

Just curious, but where would you go to get your wheel machined so that the offset is higher (less aggressive)? How much does this cost?

Several machine shops do it locally here, I am getting it done at a specialty wheel repair shop. They charge 75.00 a wheel

[pikcachu]

Originally Posted by Tcmcec

Several machine shops do it locally here, I am getting it done at a specialty wheel repair shop. They charge 75.00 a wheel

damn.... $75 a wheel

also are you sure you will have enough clearance against the strut if you remove 5mm ?

[Tcmcec]

Originally Posted by pikcachu

damn.... $75 a wheel

Canadian, so be about 25 a wheel US.

[pikcachu]

Originally Posted by Tcmcec

Canadian, so be about 25 a wheel US.

Ah then those will be Canadian millimeters also so might not hit the strut

[Tcmcec]

Originally Posted by pikcachu

Ah then those will be Canadian millimeters also so might not hit the strut

Should be good on the strut side as it will only be about 6mm closer to the strut than factory and a bunch of guys are running 9.5" x 45 offset which puts you at 12mm closer to strut from factory.

[pikcachu]

Originally Posted by Tcmcec

Should be good on the strut side as it will only be about 6mm closer to the strut than factory and a bunch of guys are running 9.5" x 45 offset which puts you at 12mm closer to strut from factory.

In the rear maybe... don't think you can fit 9.5" x 45 in the front....

[Tcmcec]

Originally Posted by pikcachu

In the rear maybe... don't think you can fit 9.5" x 45 in the front....

No I'm only talking rear sorry. I am running 8" with 245's up front no issues there

[pikcachu]

Originally Posted by Tcmcec

No I'm only talking rear sorry. I am running 8" with 245's up front no issues there

Ah yes 8 with 245 works fine. What offset are you running in the front 40-42?

[aerobod]

With an 18x8" ET45mm offset wheel, I have 5mm of clearance from the front strut tube to the wheel rim on our M240i. 18x9 ET45 wheels will likely touch the front strut, ET35 is probably the least offset that will work with a 9" wide front.

[Tcmcec]

Originally Posted by aerobod

With an 18x8" ET45mm offset wheel, I have 5mm of clearance from the front strut tube to the wheel rim on our M240i. 18x9 ET45 wheels will likely touch the front strut, ET35 is probably the least offset that will work with a 9" wide front.

That's good to know. No concerns with the front though. Just looking for advice with the rears and pulling rear fenders and shaving hubs etc.

[Tcmcec]

Originally Posted by pikcachu

Ah yes 8 with 245 works fine. What offset are you running in the front 40-42?

40 offset on the front with the 8" rim. Sticks out 11mm more than factory

[cxp213]

My rears are 9.5" +45 with 265/35 tires. No fender roll/pull and no rubbing issues, lowered on H&Rs.

[Dylan86]

Originally Posted by aerobod

With an 18x8" ET45mm offset wheel, I have 5mm of clearance from the front strut tube to the wheel rim on our M240i. 18x9 ET45 wheels will likely touch the front strut, ET35 is probably the least offset that will work with a 9" wide front.

ET42 is the sweet spot for the 18x9 square, I don't know that anyone makes an 18x9 et45 wheel? The Apex wheels, in 18x9 ET42, are specially made for 1&2 series cars. I bought my ARC-08 wheels in the 18x9 ET42 square fitment. I have camber adjustment so no concern there, but it does require a spacer to clear the coil spring /perch on the coilovers. Hoping to use 10mm or smaller, will be test fitting in Feb/Mar but this is the recipe that Apex steered me towards, based on my setup and 255 tire requirements.

[B58togo]

Originally Posted by aerobod

With an 18x8" ET45mm offset wheel, I have 5mm of clearance from the front strut tube to the wheel rim on our M240i. 18x9 ET45 wheels will likely touch the front strut, ET35 is probably the least offset that will work with a 9" wide front.

9” wide ET 45 will definitely hit the strut. I have 8.5 ET 45 and they hit. Had to install 5mm spacers. Could have gotten away with 3mm, but I want to try 235’s when the 225’s are done.

[cxp213]

Originally Posted by B58togo

9” wide ET 45 will definitely hit the strut. I have 8.5 ET 45 and they hit. Had to install 5mm spacers. Could have gotten away with 3mm, but I want to try 235’s when the 225’s are done.

I have 235s on my 8.5" +40 and there's literally about 3mm of inner clearance with no rubbing issues. In the pic above, though, I'm running a 5mm spacer in the front (steering is also slightly turned) and the fender gets kissed under compression while cornering.

[CP911]

Originally Posted by Tcmcec

Should be good on the strut side as it will only be about 6mm closer to the strut than factory and a bunch of guys are running 9.5" x 45 offset which puts you at 12mm closer to strut from factory.

How are you getting 6mm closer to strut than factory with a 18x9et40 wheel? If it were same offset as stock (45mm), half of the additional 1.5" wheel/rim width is ~19mm towards the strut vs. stock, but then shaving 5mm will bring the wheel in ANOTHER 5mm towards the strut... so ~24mm or nearly a full inch inwards compared to stock wheel.

*edit* Oops nevermind... realized you were talking rear only and said you had 8" wide et40 up front.

[Tcmcec]

Originally Posted by cxp213

My rears are 9.5" +45 with 265/35 tires. No fender roll/pull and no rubbing issues, lowered on H&Rs.

That looks pretty well bang on for the rear. When I do your setup in my offset calculator it comes out to 26mm from hub than stock. When I entered in my 18x9. Et40 is came up with 25mm, but it looks like you have less poke than I do. I wonder if it's the H&R drop compared to my Dinan drop that is pulling the camber in slightly. Do you have any pictures directly down the side of the car?

[Tcmcec]

Originally Posted by CP911

How are you getting 6mm closer to strut than factory with a 18x9et40 wheel? If it were same offset as stock (45mm), half of the additional 1.5" wheel/rim width is ~19mm towards the strut vs. stock, but then shaving 5mm will bring the wheel in ANOTHER 5mm towards the strut... so ~24mm or nearly a full inch inwards compared to stock wheel.

I'm talking about rears not front. I'm only running 18x8 et40 front, no issues there. It's the rear that is giving me too much poke for my liking. Rears are 18x9 et40

[CP911]

Sorry yes.. it was my bad. (see edit in my post. )

[Maynard]

So nobody is batting an eye at just shaving off half of the most crucial part of a wheel, and probably one never designed for that?? Have you ever seen what a fractured wheel looks like, or what happens to the car that was running it right as it broke? Might be fine for the trailer-queen car show circuit, but not something you are actually going to ride in. Please re-think this and sell the wheels you can't use and buy ones that will fit (or roll the fenders - you won't die or kill s/b from shitted up bodywork). Even spacers are a bit iffy for true performance driving (especially w/o longer bolts to go with them).