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[clutch128]

Originally Posted by TheSt|G

Stoptechs do require 18s generally, as their fitment is usually worse than Brembo.

for better or worse the StopTechs have been paid for. What are your thoughts on O.Z. Alleggerita HLT 18x8 with a 225/40? I'm struggling to find a better option...but maybe you have an idea for me?

[Kubricks]

Great thread!
I am running a set of 18" Prodrive which are pretty light weight considered it's size, but I am still constantly looking for a set of light weight reliable 17" for track use. I have had 17" M-sport 207M for a while but they are too heavy to be honest.

[Iron Man]

Originally Posted by clutch128

for better or worse the StopTechs have been paid for. What are your thoughts on O.Z. Alleggerita HLT 18x8 with a 225/40? I'm struggling to find a better option...but maybe you have an idea for me?

APEX Aero-7 wheels? They come in 18X8, but weigh about a pound more than the OZ's. They are flow-formed though and cost less.

[clutch128]

Originally Posted by Iron Man

APEX Aero-7 wheels? They come in 18X8, but weigh about a pound more than the OZ's. They are flow-formed though and cost less.

that's a good idea. You think these would be stronger than the OZ's? I don't really understand differences in construction but would love to get schooled.

Any thoughts on compatibility with the StopTech BBK ST-60/355mm?

[TheSt|G]

Originally Posted by clutch128

for better or worse the StopTechs have been paid for. What are your thoughts on O.Z. Alleggerita HLT 18x8 with a 225/40? I'm struggling to find a better option...but maybe you have an idea for me?

Sucks to hear that, hopefully you don't have any of the other usual Stoptech fitment fun like cutting dust shields off.

If we are talking 18" wheels, it depends what you are looking for. Strength, weight, or cost?

[clutch128]

Originally Posted by TheSt|G

Sucks to hear that, hopefully you don't have any of the other usual Stoptech fitment fun like cutting dust shields off.

If we are talking 18" wheels, it depends what you are looking for. Strength, weight, or cost?

it's just for the track so probably weight is my biggest concern. These won't see any potholes but strength is important for obvious reasons

[Iron Man]

Originally Posted by clutch128

that's a good idea. You think these would be stronger than the OZ's? I don't really understand differences in construction but would love to get schooled.

Any thoughts on compatibility with the StopTech BBK ST-60/355mm?

Not sure about the StopTech compatibility, but seeing that they are flow-formed (both the OZ and APEX), both will be stronger than just a cast wheel, but not as strong as a fully forged wheel (like from BBS). The cost for a flow formed wheel is substantially less than a fully forged wheel, but strength levels are still very good. I believe several people are tracking APEX wheels on here, so I would think you will be okay from a strength standpoint. (OZ and APEX should have comparable/equivalent strengths)

[PrematureApex]

Originally Posted by Iron Man

Not sure about the StopTech compatibility, but seeing that they are flow-formed (both the OZ and APEX), both will be stronger than just a cast wheel, but not as strong as a fully forged wheel (like from BBS). The cost for a flow formed wheel is substantially less than a fully forged wheel, but strength levels are still very good. I believe several people are tracking APEX wheels on here, so I would think you will be okay from a strength standpoint. (OZ and APEX should have comparable/equivalent strengths)

I know we've been over this before...

But as a general rule, companies design wheels to meet certain strength minimums. The use of forging isn't netting you a stronger wheel, necessarily, but rather, the ability to meet whatever strength criteria you're aiming for, with a reduction in weight.

A cast BBS wheel is likely to be just as strong as a forged BBS wheel, with the big difference being the amount of weight they were able to save on the forged wheel.

If you designed for weight, of course, the forged wheel is going to be stronger. But most design for a strength target.

The flow forming used by APEX/OZ allows them to save a bit vs. conventional casting on the weight side. The end result isn't necessarily a stronger wheel at all.

Of course some wheels are just stronger than others. But that's pretty independent of forged vs. cast. Some cast wheels are indestructible, while some forged wheels are easily bent.

When you see a light, cast wheel (e.g. RPF1), yeah, it's probably going to be on the weaker end of things. Conversely, a heavy forged wheel will probably be stronger than most.

C/N: Most good forged wheels are not stronger than good cast wheels. Rather, they are lighter.

[Iron Man]

Originally Posted by PrematureApex

I know we've been over this before...

But as a general rule, companies design wheels to meet certain strength minimums. The use of forging isn't netting you a stronger wheel, necessarily, but rather, the ability to meet whatever strength criteria you're aiming for, with a reduction in weight.

A cast BBS wheel is likely to be just as strong as a forged BBS wheel, with the big difference being the amount of weight they were able to save on the forged wheel.

If you designed for weight, of course, the forged wheel is going to be stronger. But most design for a strength target.

The flow forming used by APEX/OZ allows them to save a bit vs. conventional casting on the weight side. The end result isn't necessarily a stronger wheel at all.

Of course some wheels are just stronger than others. But that's pretty independent of forged vs. cast. Some cast wheels are indestructible, while some forged wheels are easily bent.

When you see a light, cast wheel (e.g. RPF1), yeah, it's probably going to be on the weaker end of things. Conversely, a heavy forged wheel will probably be stronger than most.

C/N: Most good forged wheels are not stronger than good cast wheels. Rather, they are lighter.

Yes, you are correct, since yield/ultimate strength is load over area, so with a cast structure you need a greater section thickness for a given maximum load and therefore heavier wheel. However, if a wheel manufacturer works to minimum strength requirements, you could have a higher strength with a flow-formed or forged wheel, since the actual proof strength of the wheel can greater exceed the minimum design criteria (for example, the design minimum is 50 ksi, where the cast wheel tests at 55 ksi and the flow-formed wheel tests 60 ksi). I know in my field, we always try to easily exceed any design minimums for SPC control, which will be easier to achieve with a flow-formed or forged wheel.

However, what you are also missing is fatigue strength (useful life of the wheel) is also dependent on grain structure of the wheel. A flow-formed and fully forged wheel will have finer grain structure, which is beneficial to an increased fatigue life (helps prevent crack propagation) for similar strengths.

So you are correct, but at the same time missing some key points as to why one wheel manufacturing process could/should be chosen over another.

[hotwheels]

Originally Posted by TheSt|G

Sucks to hear that, hopefully you don't have any of the other usual Stoptech fitment fun like cutting dust shields off.

If we are talking 18" wheels, it depends what you are looking for. Strength, weight, or cost?

I'm waiting too for Apex make 17' Arc-8 in 1 series fitment...
17x8 ET45 would be perfect

[tglazed]

17x8 offset 38 ssr competition. These would be very close Fitment wise and I have a pair for sale 😉

[TheSt|G]

Originally Posted by hotwheels

I'm waiting too for Apex make 17' Arc-8 in 1 series fitment...
17x8 ET45 would be perfect

Email them, let them know there is a market.

[hoki06]

Originally Posted by TheSt|G

Email them, let them know there is a market.

Email sent

If they made a 17x8.5 +45 EC-7 I'd buy them immediately.

[TheSt|G]

Originally Posted by hoki06

Email sent

If they made a 17x8.5 +45 EC-7 I'd buy them immediately.

That or the ARC-8s. I'm not picky.

[hoki06]

Originally Posted by TheSt|G

That or the ARC-8s. I'm not picky.

EC-7 would be my first choice but I'll be shocked if they were to make a 17" version. ARC-8 would make sense since they already offer a +40 fitment.

[John_01]

It would be cool to have a ARC-8 in 17x8.5" that can fit a proper 245 R-comp on the rear without fender mods, or otherwise 255 R-comp with a moderate roll. Something like 17x8.5" ET48 or 17x9" ET50, would probably do it (I think).

[Dafttt]

Originally Posted by John_01

Something like 17x8.5" ET48 or 17x9" ET50, would probably do it (I think).

Please please please please make this a reality, Apex!

[PrematureApex]

Yup, better off starting with something like a 50 and being able to move it outwards should have the need.

[clutch128]

Originally Posted by Iron Man

Not sure about the StopTech compatibility, but seeing that they are flow-formed (both the OZ and APEX),

checking with OZ and Apex both will clear the ST-60's with 355mm rotors

Crew,
This is a great article if you haven't seen it
http://www.myapexparts.com/2013/09/1...es-track-setup

[TheSt|G]

Originally Posted by clutch128

checking with OZ and Apex both will clear the ST-60's with 355mm rotors

Crew,
This is a great article if you haven't seen it
http://www.myapexparts.com/2013/09/1...es-track-setup

Sadly, 18" focused.

[clutch128]

Originally Posted by TheSt|G

Sadly, 18" focused.

Also sadly, for posterity, they confirmed 17" don't.

[TheSt|G]

Originally Posted by clutch128

Also sadly, for posterity, they confirmed 17" don't.

I know. I keep being told otherwise by people, but that's what they tell me everytime I talk to APEX.