[DallasBoosted]

FWIW Tirerack says the section width of the 275/35-18 PSS is 10.9" and Nitto claims the overall width of the 275/40-17 NT01 is 10.91".

Are these specs reliable at all? If so, then the 17x10" et25 would be ~16mm further out than my current wheels, assuming the tires are the same size?

Would a fair test be strapping on some 15mm spacers then and see if it rubs?

[Expert@ApexWheels]

Originally Posted by DallasBoosted

FWIW Tirerack says the section width of the 275/35-18 PSS is 10.9" and Nitto claims the overall width of the 275/40-17 NT01 is 10.91".

Are these specs reliable at all? If so, then the 17x10" et25 would be ~16mm further out than my current wheels, assuming the tires are the same size?

Would a fair test be strapping on some 15mm spacers then and see if it rubs?

Not sure how accurate both of those measurements are, but if it is indeed within 0.01" of each other, you should in theory be able to run the 275/40/17 NT01. If the specs are reliable, that is correct, best way to figure out is to add the 15mm spacer (or even 20mm spacers to test against the 17x10.5" ET27).

[DallasBoosted]

Next obvious question is how much benefit will the 10" wheel be performance-wise over the 9.5" wheel on a 275/40-17 NT01? The 9.5" wheel is available in et35 which is a known-fit.

[Expert@ApexWheels]

Originally Posted by DallasBoosted

Next obvious question is how much benefit will the 10" wheel be performance-wise over the 9.5" wheel on a 275/40-17 NT01? The 9.5" wheel is available in et35 which is a known-fit.

The 10" wheel will give a little better sidewall support for the 275/40/17 in comparison to the 9.5" wheel, which can be beneficial on road courses. The 275/40/17 on the 17x9.5" ET35 is definitely the easier fit which is why it's so well known, as it doesn't require much work for the wheel to fit on the e9x.

[DallasBoosted]

Originally Posted by David@ApexRaceParts

The 10" wheel will give a little better sidewall support for the 275/40/17 in comparison to the 9.5" wheel, which can be beneficial on road courses. The 275/40/17 on the 17x9.5" ET35 is definitely the easier fit which is why it's so well known, as it doesn't require much work for the wheel to fit on the e9x.

Can you quantify the "little better" in this statement? Is it significant, as in can be felt? Is it significant enough that I'd take the weight penalty of running an 18x10 EC-7 (et33) rather than the 17x10 arc-8 (et25) ?

Thanks for your input

[Expert@ApexWheels]

Originally Posted by DallasBoosted

Can you quantify the "little better" in this statement? Is it significant, as in can be felt? Is it significant enough that I'd take the weight penalty of running an 18x10 EC-7 (et33) rather than the 17x10 arc-8 (et25) ?

Thanks for your input

For road racing, it comes down to fractions of a second, and you would really feel is during slaloms or quick transitions. For most people, it is mostly feel and the difference is negligible. For race car drivers where every tenth of a second counts, that's when it the extra sidewall support comes into play. With that said, the 17x9.5" ET35 would definitely be less work and provide very similar results on the track with the same width tire in comparison to the 17x10" ET25 or even the 18x10" ET33. However, if you are using this setup to drag race, the 17x9.5" ET35 is better than the 18x10" ET33 EC-7.

[tsuma]

I'm looking at the ARC-8 17*9.5" - ET35 for a square fitment on my E91 6MT (pre-LCI).

What's the best DD tire size:

1. 225/45-17
2. 245/40-17
3. Something bigger?

I'm also considering taking the car to the MSR track just for fun. Do I need to mess with camber as a noob?

Finally, do you have any pix of these in Anthracite/Satin/Hyper black mounted on a white E9x? Trying to decide between the dark colors. Sorry it's not a technical question but I just hate my OEM 16" silver wheels.

[UltraRacer13]

Originally Posted by tsuma

I'm looking at the ARC-8 17*9.5" - ET35 for a square fitment on my E91 6MT (pre-LCI).

What's the best DD tire size:

1. 225/45-17
2. 245/40-17
3. Something bigger?

I'm also considering taking the car to the MSR track just for fun. Do I need to mess with camber as a noob?

Finally, do you have any pix of these in Anthracite/Satin/Hyper black mounted on a white E9x? Trying to decide between the dark colors. Sorry it's not a technical question but I just hate my OEM 16" silver wheels.

Ill take a stab at helping you. 1- you dont even need track wheels to run at MSR. I have done probably 15 track days on my daily wheel/tire setup. At some point it is cheaper to get track wheels and tires.
2-the apex are a great choice- you just missed a group buy on the arc-8 17s I just ordered some myself. Great wheels. But the 9.5's are wide and will require a 5mm spacer up front and camber plates to clear the strut. David can help you sort out the right fitment for you- but maybe the 9's solve this issue. Not to mention 225's are too narrow for 9.5 wheels.

Good luck- hope to see you out there.

[Mavus]

Originally Posted by tsuma

I'm looking at the ARC-8 17*9.5" - ET35 for a square fitment on my E91 6MT (pre-LCI).

What's the best DD tire size:

1. 225/45-17
2. 245/40-17
3. Something bigger?

I'm also considering taking the car to the MSR track just for fun. Do I need to mess with camber as a noob?

Finally, do you have any pix of these in Anthracite/Satin/Hyper black mounted on a white E9x? Trying to decide between the dark colors. Sorry it's not a technical question but I just hate my OEM 16" silver wheels.

You can run 17x9.0 square with 245 tires on stock without issues. Even 255 square will work just get the right rims/offsets.

[tsuma]

Thanks UltraRacer13 and NokTurNaL 330i.

I see the ARC-8 offered in only the following widths and offsets:

1. 17x8.5" 40ET
2. 17x9.0" 42ET
3. 17x9.0" 30ET Concave
4. 17x9.5" 35ET Concave

Would I need a 5mm plate with #1 or #3 to get to the proper offset of 35mm for a pre-LCI E91?

[Mavus]

Originally Posted by tsuma

Thanks UltraRacer13 and NokTurNaL 330i.

I see the ARC-8 offered in only the following widths and offsets:

1. 17x8.5" 40ET
2. 17x9.0" 42ET
3. 17x9.0" 30ET Concave
4. 17x9.5" 35ET Concave

Would I need a 5mm plate with #1 or #3 to get to the proper offset of 35mm for a pre-LCI E91?

I would get #3 and run 245 or 255 square. If you are not tracking 245 square is easy worry-free fit, no camber plates or spacers required. You will add more grip in front and can rotate wheels also. I have 9.5 square with 255 with camber plates and 5mm spacers in front on my pre-lci 330i. You can get PS2 tires which are also lighter by around 2 lbs than other brands according to Tirerack. This will help reduce unsprung weight even further. You will have an awesome light-weight set-up.

GL

[Expert@ApexWheels]

Originally Posted by tsuma

I'm looking at the ARC-8 17*9.5" - ET35 for a square fitment on my E91 6MT (pre-LCI).

What's the best DD tire size:

1. 225/45-17
2. 245/40-17
3. Something bigger?

I'm also considering taking the car to the MSR track just for fun. Do I need to mess with camber as a noob?

Finally, do you have any pix of these in Anthracite/Satin/Hyper black mounted on a white E9x? Trying to decide between the dark colors. Sorry it's not a technical question but I just hate my OEM 16" silver wheels.

The 245/40/17 would be recommended over the 225/45/17 on the 17x9.5" ET35 setup. However, the 17x9.5" ET35 setup is geared more towards a track setup with camber plates, for those trying to fit a 255/40/17 R-compound on their car.

Originally Posted by tsuma

Thanks UltraRacer13 and NokTurNaL 330i.

I see the ARC-8 offered in only the following widths and offsets:

1. 17x8.5" 40ET
2. 17x9.0" 42ET
3. 17x9.0" 30ET Concave
4. 17x9.5" 35ET Concave

Would I need a 5mm plate with #1 or #3 to get to the proper offset of 35mm for a pre-LCI E91?

A 5mm spacer is only required for the 17x9.5" ET35 fronts for the wheels to clear the strut. The 17x9.0" ET30 and 17x8.5" ET40 do not have this issue, and spacers would only be added for cosmetics on the 17x8.5" ET40 since it sits well inside of the fender. People would then add a spacer to push the wheel away from the hub so that it sits closer to the fender for aesthetic purposes.

Originally Posted by NokTurNaL 330i

I would get #3 and run 245 or 255 square. If you are not tracking 245 square is easy worry-free fit, no camber plates or spacers required. You will add more grip in front and can rotate wheels also. I have 9.5 square with 255 with camber plates and 5mm spacers in front on my pre-lci 330i. You can get PS2 tires which are also lighter by around 2 lbs than other brands according to Tirerack. This will help reduce unsprung weight even further. You will have an awesome light-weight set-up.

GL

That is correct, the 17x9.0" ET30 with the 245/40/17 setup would be a great setup for those that do not have camber plates or aftermarket suspension, or do not have a dedicated track setup. These are one of the most popular setups for the e9x non-M for dual duty and street use. The wheels sit very flush to the fender, and does not require any additional modifications for the tires to clear as long as you are using a street tire. Extreme summer tires or R-compounds may give you trouble when you are lowered, but at stock height they should also be okay.

[tsuma]

Originally Posted by NokTurNaL 330i

If you are not tracking 245 square is easy worry-free fit, no camber plates or spacers required. ... You can get PS2 tires which are also lighter by around 2 lbs than other brands according to Tirerack. ...
GL

Thanks for the suggestions. Unfortunately Tire Rack does not sell Michelin PS2 in 245/40-17 size, only the Pilot Super Sport (aka PS3 in Europe). I'll do a little bit of research to figure out whether they are worth the cost.

[neoduffer]

David@Apex - Are these wheels ball seat or conical seat? I was wondering if the stock bolts can be used or do I need to get a stud kit to use conical lug nuts. Thanks.

[Expert@ApexWheels]

Originally Posted by neoduffer

David@Apex - Are these wheels ball seat or conical seat? I was wondering if the stock bolts can be used or do I need to get a stud kit to use conical lug nuts. Thanks.

The mounting holes on the wheels are conical because the OEM lug bolts are conical, not ball seat. BMW comes with conical lug bolts instead of the ball seat that many other manufacturer's use. This comes in handy when switching to a stud kit with lug nuts as most aftermarket tuner lug nuts are also conical seat.

[nafoo]

Does anyone know if AP Racing BBK will fit inside these 17s? I have the 17x9.5 in the rear and 17x9 in the front.

[ApexWheels]

Originally Posted by nafoo

Does anyone know if AP Racing BBK will fit inside these 17s? I have the 17x9.5 in the rear and 17x9 in the front.

When testing AP Racing's only big brake kit available for the E9X chassis, 356mm rotor and 6 pistons, the 17x9" ET30 wheel was extremely close to the drop center of the barrel on the wheel. To be absolutely sure that there would not be any interference issues I would recommend a 5mm front wheel spacer. If this isn't a time constrained situation than you can always try to fit the wheels and see if they clear, if they do not then a 5mm wheel spacer can be ordered.

This is the AP Racing kit I tested on our 17x9" ET30 wheel - AP Racing E9X BBK

[gilly22]

Originally Posted by David@ApexRaceParts

...The 17x9.0" ET30 and 17x8.5" ET40 do not have this issue, and spacers would only be added for cosmetics on the 17x8.5" ET40 since it sits well inside of the fender. People would then add a spacer to push the wheel away from the hub so that it sits closer to the fender for aesthetic purposes.



That is correct, the 17x9.0" ET30 with the 245/40/17 setup would be a great setup for those that do not have camber plates or aftermarket suspension, or do not have a dedicated track setup. These are one of the most popular setups for the e9x non-M for dual duty and street use. The wheels sit very flush to the fender, and does not require any additional modifications for the tires to clear as long as you are using a street tire. Extreme summer tires or R-compounds may give you trouble when you are lowered, but at stock height they should also be okay.

Hey David -

I have an 08 e91 xi (pre LCI) and was curious how the 17x9 et30's would fair. Does the fact it has awd make much of a difference compared to the non-awd applications? I would be doing a square setup with 255 or 245 40 17 Conti DWS's if that helps.

Thanks in advance!

[UltraRacer13]

Originally Posted by gilly22

Hey David -

I have an 08 e91 xi (pre LCI) and was curious how the 17x9 et30's would fair. Does the fact it has awd make much of a difference compared to the non-awd applications? I would be doing a square setup with 255 or 245 40 17 Conti DWS's if that helps.

Thanks in advance!

I am running this size on my xi. 255 40 17 square. I do have coils though. Not sure you need them.

[gilly22]

Originally Posted by UltraRacer13

I am running this size on my xi. 255 40 17 square. I do have coils though. Not sure you need them.

Good to know. My car has the factory spots package, so it's a skosh lower than stock. Not sure I'll be doing coil overs on this rig...my M3 is my tweaking car I would like to run some of these ARC's at some point though.

[Expert@ApexWheels]

Originally Posted by gilly22

Hey David -

I have an 08 e91 xi (pre LCI) and was curious how the 17x9 et30's would fair. Does the fact it has awd make much of a difference compared to the non-awd applications? I would be doing a square setup with 255 or 245 40 17 Conti DWS's if that helps.

Thanks in advance!

The AWD does not make a difference for the wheel fitment in this instance. With the 255, we usually recommend camber plates at the least in order for your wheels to clear your fenders properly, though the 245 would not require it. The 17x9.0" ET30 with the 245/40/17 setup would be a great setup for those that do not have camber plates or aftermarket suspension, or do not have a dedicated track setup. These are one of the most popular setups for the e9x non-M for dual duty and street use. The wheels sit very flush to the fender, and does not require any additional modifications for the tires to clear as long as you are using a street tire. Extreme summer tires or R-compounds may give you trouble when you are lowered, but at stock height they should be okay.

[bjf66]

These wheels look really promising; wish there were more pictures of them on a car like mine. Is anyone running these on an E92 LCI?

What is the recommended offset(s) for E92 LCI (with wider track than pre-LCI) for tracking? Would the no-compromise/best track wheels have to be a square setup, or would it a staggered setup with the right offset be just as good, without any downsides? Thanks