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      10-07-2019, 10:24 AM   #1
Docall
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Running 18" Apex wheels

Any issues with running apex 18 in wheels with 35 series Nt01? Itís a smaller diameter than stock. I ran them on my base m4, but am wondering if the diameter difference on the gts will cause a problem.
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      10-07-2019, 11:21 AM   #2
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Quote:
Originally Posted by Docall View Post
Any issues with running apex 18 in wheels with 35 series Nt01? Itís a smaller diameter than stock. I ran them on my base m4, but am wondering if the diameter difference on the gts will cause a problem.
Did your base have carbon ceramics? I feel like they wouldn't clear
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      10-07-2019, 11:22 AM   #3
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They wont fit with CCBs.
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      10-07-2019, 12:13 PM   #4
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Need to either downgrade to the non-CCB calipers, or switch to a BBK that clears it. AP Racing 9668 + 9449 is the combo I'm planning on swapping to this winter to clear 18" wheels + use an iron rotor.
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      10-07-2019, 01:40 PM   #5
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i switched out the carbon stock to the Essex ap Racing. They do clear the Essex kit.
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      10-07-2019, 02:03 PM   #6
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In that case then the only issue I can think of relates to MDM/ABS having issues, and that might be hard to get good data on. Seems most people who track their cars immediately turn off MDM, as it sounds rather intrusive. Curious if the ABS can adapt or if it will pulse incorrectly for the tire size/compound.

If you go with the NT01 I would like to hear your impression + see your results. I'll probably start on NT01s, as it sounds like they wear very well and are quite predictable.
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      10-07-2019, 09:29 PM   #7
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Iím doing a track day at Road America this weekend. I always run with traction control off. I didnít have any issues running them on my base. 275 up front, 305 rear. Iíll post after how it went.
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      10-10-2019, 10:39 PM   #8
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They fit. Hopefully it isnít too cold this weekend at Road America
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      10-11-2019, 01:09 AM   #9
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May I ask for the brake kit item numbers and the specs on the wheels?
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      10-11-2019, 07:26 AM   #10
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Quote:
Originally Posted by schnell325 View Post
May I ask for the brake kit item numbers and the specs on the wheels?
Brakes:
https://www.essexparts.com/essex-des...-f87m2f80m3f82

https://www.essexparts.com/essex-des...36530mm-M2M3M4

The wheels are APEX SM10. Common setups are 18Ē 9.5et22 F + 18Ē 11et44 R or 18Ē 10et25 F + 18Ē 11et44 R. Both clear the Essex/AP brake setups. There are a few other options available if you prefer a square setup or are willing to work a bit to stuff a 295 or 305 tire on the F.
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      10-11-2019, 10:13 AM   #11
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Quote:
Originally Posted by Gomeler View Post
In that case then the only issue I can think of relates to MDM/ABS having issues, and that might be hard to get good data on. Seems most people who track their cars immediately turn off MDM, as it sounds rather intrusive. Curious if the ABS can adapt or if it will pulse incorrectly for the tire size/compound.

If you go with the NT01 I would like to hear your impression + see your results. I'll probably start on NT01s, as it sounds like they wear very well and are quite predictable.
No worries about the ABS system, it's just fine whether your car was a base M3/4, ZCP, CS, GTS.
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      10-28-2019, 10:55 PM   #12
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MDM was very intrusive. It was cold at Road America only 38-44 deg so I did run with mdm as I couldnít get much heat into the Nt01tires. The overall diameter on the rear tires are about .5 in off stock I believe, and I think this was why the mdm was so intrusive. I usually run with traction control all the way off.
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      10-28-2019, 10:58 PM   #13
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Quote:
Originally Posted by M3SQRD View Post
Brakes:
https://www.essexparts.com/essex-des...-f87m2f80m3f82

https://www.essexparts.com/essex-des...36530mm-M2M3M4

The wheels are APEX SM10. Common setups are 18Ē 9.5et22 F + 18Ē 11et44 R or 18Ē 10et25 F + 18Ē 11et44 R. Both clear the Essex/AP brake setups. There are a few other options available if you prefer a square setup or are willing to work a bit to stuff a 295 or 305 tire on the F.
I was running the 18 10et 25 275 35, and 18 11et44 305 35 NT01. That link is the kit. I went with the kit that holds the smaller brake pad.
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      10-28-2019, 11:03 PM   #14
Docall
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Some pics....
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      10-29-2019, 07:59 AM   #15
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Quote:
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Some pics....
Looks incredible. Iím looking to swap out the brakes this winter as well, so thanks for the info.

Hopefully will be able to make up to RA next year.
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      10-29-2019, 08:34 AM   #16
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Quote:
Originally Posted by Docall View Post
MDM was very intrusive. It was cold at Road America only 38-44 deg so I did run with mdm as I couldn’t get much heat into the Nt01tires. The overall diameter on the rear tires are about .5 in off stock I believe, and I think this was why the mdm was so intrusive. I usually run with traction control all the way off.
Sweet pics. No, it's not the rear tire width or diameter. Whether stock 20" w/ 285s or aftermarket 19" with 305s fitted, unfortunately MDM is useless. GTS is an old school M car, has to be run TC fully off for any pace. (Understandable why you decided against that on a 40 degree day @ RA...) It'll feel like a new car whenever you do get to turn everything off.
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      10-29-2019, 01:17 PM   #17
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I only used MDM on the two wet runs that weekend. It dropped my lap times by several seconds, but did save me once at turn 3 and again at 12. Planning to run the Nitto NT01 315/30ZR18 rears and Toyo R888R 295/30ZR18 fronts next season. Can't wait to see if I can catch you with those! lol
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      10-29-2019, 09:45 PM   #18
Docall
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Quote:
Originally Posted by Kev608 View Post
I only used MDM on the two wet runs that weekend. It dropped my lap times by several seconds, but did save me once at turn 3 and again at 12. Planning to run the Nitto NT01 315/30ZR18 rears and Toyo R888R 295/30ZR18 fronts next season. Can't wait to see if I can catch you with those! lol
Nice! You going to Atlanta in November? Should be much better weather!
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      10-30-2019, 07:54 AM   #19
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Quote:
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Nice! You going to Atlanta in November? Should be much better weather!
I'm not going to Atlanta. I don't have a trailer for my car and I don't drive it in the winter. I'll be back at RA in May and June.
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      12-02-2019, 01:17 AM   #20
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Quote:
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They fit. Hopefully it isn’t too cold this weekend at Road America
Did either the front or rear dust shields need to be trimmed when fitting the AP set up?
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      12-02-2019, 10:31 PM   #21
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Did either the front or rear dust shields need to be trimmed when fitting the AP set up?
Yes, the dust shields need to be trimmed. The back especially. The back have a slight lip toward the hub that was rubbing slightly on the backside of the inner hat. Not too hard to trim all the way around with tin snips.
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      12-02-2019, 10:34 PM   #22
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Quote:
Originally Posted by Docall View Post
Quote:
Originally Posted by Lienrocs View Post
Did either the front or rear dust shields need to be trimmed when fitting the AP set up?
Yes, the dust shields need to be trimmed. The back especially. The back have a slight lip toward the hub that was rubbing slightly on the backside of the inner hat. Not too hard to trim all the way around with tin snips.
Awesome. That's what I figured! Thank you. How are the brakes holding up?

Also, any issues running the 18 inch wheels. I haven't looked at the overall diameter of your tire set up but I'm guessing it's a bit shorter than stock, especially in the rear. No big concerns? How far off is the speedo?
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