Apex Wheels

Thanks to the community, we’ve nearly finalized our proposed 18” wheel specifications. As you may very well know, seemingly minute millimeter differences in wheel offset can result in large differences in overall wheel fitment. It directly determines how the wheel fits, performs, and is often times the deciding factor between it working, working well, or ultimately not working. With this said, we need your assistance in deciding between a handful of offsets for our 9” front option.

18x9” ET48: least inner (suspension) clearance, more outer (fender) clearance
18x9” ET47: 1mm more inner clearance, 1mm more aggressive towards the fender
18x9” ET46: 2mm more inner clearance, 2mm more aggressive towards the fender
18x9" ET45 or below -

For example, the +48 offset has approximately ~2mm of inner clearance (wheel to bottom spring perch) with linear spring equipped Ohlins coilovers. We’re unsure if this is the case across the board with all linear spring coilovers as it’s dependent on the use of a helper spring, spring length, inner diameter, etc, etc, so we’d like to hear your thoughts. Since it will not require a change in negative camber settings from the original +48, our suspicion is that the +46 is the best option to compensate for any tire deflection under severe load while on track. We typically like to see ~3mm of clearance to ensure ample clearance under any load, condition, or to account for tire deflection.

Apex Wheels

While a 997 GT3 equipped with cup flares can accommodate our profile 2 concavity wheel specifications in the front, we opted to show what front (profile 1) & rear (profile 3) wheels would typically be seen. Here is some on-car imagery of 18" APEX SM-10 on our longtime friend & partner, BRRacing's, 997.2 GT3.

Race Silver -


Anthracite -


Satin black -

Apex Wheels

We are making final advancements in the engineering and initial production stages prior to our initial pre-order/group buy. Please take this opportunity to share your fitment thoughts as enthusiast feedback is integral to product development.

Ratchet1025

Sorry for the long delay. I just sent my current wheel specs by e-mail Thanks again!

Apex Wheels

Much appreciated - nice chatting with you. Looking forward to seeing your 996 on APEX! In the meantime, enjoy your new suspension and tire compound.

Apex Wheels

Seen below is an IMSA ST 987 Boxster on 18” APEX SM-10. Equipped with a plethora of suspension components and Continental slicks, look out for this car on your East Coast racetracks and classified ads!

A Brembo GT brake kit is stuffed underneath the SM-10. Flaunting 380mm rotors and 6-piston front calipers, they clear the 18” SM-10 spokes and barrels with ease. Do not be forced into running larger diameter wheels than desired due to inferior brake clearance.

Race Silver -


Anthracite -


Satin Black -

Nickshu

FWIW on my lowered 996 C2 with coilovers the wheel hits the coilover in 18x8.5 ET53 OZ Alleggerita. I have to run 15mm spacers on the front. So an additional 15mm of offset build into the wheel for this car would be helpful. I am running 245 Hoosier R7s but the wheel actually hits the coilover, not the tire.

Running 18x11"s on the back in ET63 with 315 Hoosier R7s clears with lots of extra room.

Apex Wheels

Excellent reference points - thank you for sharing.

This seems to be of the few isolated cases where 18x8.5" ET53 causes inner clearance issues. I know many enthusiasts run various width spacers with that wheel width and offset, but purely for aesthetic purposes. Our two 8.5" front options; ET50 (-3mm offset from yours san spacers) and ET42 (-11mm offset from yours sans spacers) should clear all front suspension components and the fenders through the full compression range. The 8.5" ET42 is identical to the stock 996 GT2 front specifications and would be ideal mated to your 245mm Hoosier.

How much inner/outer clearance do you have in the rear with the 11" ET63 and 315mm Hoosier? Please let me know if you've rolled your rear fenders and your alignment settings for context. If we were to decrease the 11" rear offset from our proposed ET62, I'd love to hear your thoughts.