Does anyone track on the style 666m competition wheels?

[Ca86108]

Do any of you with the 20" comp package track on the style 666m wheels? What tires do you run? It seems like the choices are extremely limited. If you run a smaller wheel for the track, do you switch to competition wheels for daily or street use or would that require another alignment each time? I love the comp wheels but the tire options are so limiting.

[FlyingLow78]

I don’t recall seeing any serious track drivers using the 666s for exactly the reason you mentioned - there are very few tires available in those sizes. Such a narrow sidewall also risks a puncture or wheel damage when bombing over curbs.

I run 19s on the street and 18s on track to give the car a little more compliance. No alignment changes necessary. I’d recommend going to the 18” 513Ms if you’re looking for a lightweight wheel that will clear iron brakes. It seems the 19s have the greatest selection of track tires, though.

[avantix]

I haven't seen many serious enthusiasts on OEM anything to be honest. First they don't offer optimal width and second they are on the heavier side. If you intend on tracking 3-4+ days a year it makes sense to get a set of dedicated track wheels and tires that you can swap on and off. I run 18" Apex EC7 on track and daily the OEM CS wheels

[SYT_Shadow]

I have 8 sets of track wheels, however, if I were tracking 3-4 days a year I would mount RE71s on my OEM wheels and use those as my daily driver wheels.

You do not need a ton of tire options. You need at least one good option, and you have it, RE71 is available in 20" sizes.

I appreciate the happiness of square 10.5" setups and have lots of them, however, for 3-4 days it is a complete waste. Much like non OEM suspensions and BBKs.

Camber plates, track pads, RE71 on whatever OEM wheel your car comes with and call it a day. If you ever get fast enough to fade the brakes then add Ti shims.

[Ca86108]

Originally Posted by avantix

I haven't seen many serious enthusiasts on OEM anything to be honest. First they don't offer optimal width and second they are on the heavier side. If you intend on tracking 3-4+ days a year it makes sense to get a set of dedicated track wheels and tires that you can swap on and off. I run 18" Apex EC7 on track and daily the OEM CS wheels

But do you have to do an alignment going from 20" to 18"? Will this cause premature tire wear on the 20" if you are aligned for the 18" track wheel?

[Ca86108]

Originally Posted by SYT_Shadow

I have 8 sets of track wheels, however, if I were tracking 3-4 days a year I would mount RE71s on my OEM wheels and use those as my daily driver wheels.

You do not need a ton of tire options. You need at least one good option, and you have it, RE71 is available in 20" sizes.

I appreciate the happiness of square 10.5" setups and have lots of them, however, for 3-4 days it is a complete waste. Much like non OEM suspensions and BBKs.

Camber plates, track pads, RE71 on whatever OEM wheel your car comes with and call it a day. If you ever get fast enough to fade the brakes then add Ti shims.

I LOVE RE71's as I use that on my track focused s2000. Please link me to where you can find these tires in 20s? I can't find it anywhere. the rears are 285/30/20 and there are literally only 3 tires options. Contis, Hoosiers, and MPSS.

[SYT_Shadow]

Originally Posted by Ca86108

I LOVE RE71's as I use that on my track focused s2000. Please link me to where you can find these tires in 20s? I can't find it anywhere. the rears are 285/30/20 and there are literally only 3 tires options. Contis, Hoosiers, and MPSS.

In the rear of my CS wheel I've used the 295/30 RE71. Fits just fine.

Per tirerack:
245/35
255/40

The 255/40 should work up front. 3.7% larger than the rear 295. 6.1% smaller than the 265/30 stock front tire

The psc2 is also found in 255/40 front and 285/30 rear

The trofeor is in 265/35 and 295/30

The dunlop sport maxx race 2 is in 265/35 and 305/30, even though the 305 is too wide for a 10" wheel

So, there are options. If you run with dsc off it doesn't really matter if your front and rear diameters are a bit off. The car doesn't care.


Sometimes you have to look for weird combo to make it work. On my CS I ran a 265/295 combo on the stock wheels. It worked juuuuuust fine. Did a 2:06 at WGI with that setup, significantly faster than people with dedicated wheel/tire setups in the optimum widths do it.
People like to focus on what the ideal solution is. If you aren't tracking a lot, the re71 i listed earlier is a great option and doesn't require you to swap wheels, etc. If you track a lot then you should get a dedicated solution, however, nothing is stopping you from starting off on the 20" s and then changing up later on if you feel the need

[Ca86108]

Thanks for the info. I will track maybe 8 times a year. I did 10 this past year. I don't mind sticking to the 20s but the only problem is that there are only two-3 tire options. It seems like the only solution are mpss if I keep 20s.

Originally Posted by SYT_Shadow

In the rear of my CS wheel I've used the 295/30 RE71. Fits just fine.

Per tirerack:
245/35
255/40

The 255/40 should work up front. 3.7% larger than the rear 295. 6.1% smaller than the 265/30 stock front tire

The psc2 is also found in 255/40 front and 285/30 rear

The trofeor is in 265/35 and 295/30

The dunlop sport maxx race 2 is in 265/35 and 305/30, even though the 305 is too wide for a 10" wheel

So, there are options. If you run with dsc off it doesn't really matter if your front and rear diameters are a bit off. The car doesn't care.


Sometimes you have to look for weird combo to make it work. On my CS I ran a 265/295 combo on the stock wheels. It worked juuuuuust fine. Did a 2:06 at WGI with that setup, significantly faster than people with dedicated wheel/tire setups in the optimum widths do it.
People like to focus on what the ideal solution is. If you aren't tracking a lot, the re71 i listed earlier is a great option and doesn't require you to swap wheels, etc. If you track a lot then you should get a dedicated solution, however, nothing is stopping you from starting off on the 20" s and then changing up later on if you feel the need

[SYT_Shadow]

Originally Posted by Ca86108

Thanks for the info. I will track maybe 8 times a year. I did 10 this past year. I don't mind sticking to the 20s but the only problem is that there are only two-3 tire options. It seems like the only solution are mpss if I keep 20s.

Or the 255/295 re71 combo

10.5" 18 wheels fit perfectly if you don't have the ceramic brakes. If you're fine to get another set of wheels go ahead.
I have four sets of the Bimmerworld TA5R and really like them. They allow 275/35 or 285/30 square tires which is the best street-able setup for me

[FlyingLow78]

Originally Posted by Ca86108

But do you have to do an alignment going from 20" to 18"? Will this cause premature tire wear on the 20" if you are aligned for the 18" track wheel?

You don’t need to do an alignment when swapping wheel/tire sets.

[ano0oj]

I track with the 666m wheels, but I also only do about 4 days a year. If you are doing 10+ days a year, then a set of 18" or 19" is the way to go. All 4 of my 666m tires need to be replaced after a 2 day event, not the ideal situation I want of course but getting another set of tires/wheels is an unfeasible option for me at this time since I don't have the storage space to put the extra set.

[Powerslide]

Originally Posted by SYT_Shadow

In the rear of my CS wheel I've used the 295/30 RE71. Fits just fine.

Per tirerack:
245/35
255/40

The 255/40 should work up front. 3.7% larger than the rear 295. 6.1% smaller than the 265/30 stock front tire

The psc2 is also found in 255/40 front and 285/30 rear

The trofeor is in 265/35 and 295/30

The dunlop sport maxx race 2 is in 265/35 and 305/30, even though the 305 is too wide for a 10" wheel

So, there are options. If you run with dsc off it doesn't really matter if your front and rear diameters are a bit off. The car doesn't care.


Sometimes you have to look for weird combo to make it work. On my CS I ran a 265/295 combo on the stock wheels. It worked juuuuuust fine. Did a 2:06 at WGI with that setup, significantly faster than people with dedicated wheel/tire setups in the optimum widths do it.
People like to focus on what the ideal solution is. If you aren't tracking a lot, the re71 i listed earlier is a great option and doesn't require you to swap wheels, etc. If you track a lot then you should get a dedicated solution, however, nothing is stopping you from starting off on the 20" s and then changing up later on if you feel the need

I only track 2-4 times per year - so I have not yet invested in dedicated track wheels/tires (although if I can get out more than that in future seasons, I'm sure I will eventually invest in dedicated track wheels/tires).

I've done four HPDE's on my stock 20" 666M rims - two of which were with the factory-spec MPSS 265/30R20 fronts and 285/30R20 rears. However, per SYT_Shadow's post above, my last two events were with the Porsche-spec RE-71R's - 245/35R20 in front, 295/30R20 in the rear - this latter setup definitely has better traction than the stock MPSS.

NOW - for this season - I still have the same RE-71R's on my 666M's - but I just got the MP HAS - and on the street - WOW - the grip I get from the combination of the RE-71R plus the lowered suspension setting is noticeably better - especially maintaining traction using throttle coming out of corners (again - street driving) - and although I cannot really test this on public roads, it feels like I'd be able to throttle-steer the car more precisely with the MP HAS and RE-71R's combined. When I have my first track event coming up in a few weeks - I'll be able to verify at that time (cannot wait)!!!

I'll definitely report back here after that next track event. Good luck either way,

[Ca86108]

Nice....I would think 245's would be way too narrow. Did you get better times on this re71 setup?

Originally Posted by Powerslide

I only track 2-4 times per year - so I have not yet invested in dedicated track wheels/tires (although if I can get out more than that in future seasons, I'm sure I will eventually invest in dedicated track wheels/tires).

I've done four HPDE's on my stock 20" 666M rims - two of which were with the factory-spec MPSS 265/30R20 fronts and 285/30R20 rears. However, per SYT_Shadow's post above, my last two events were with the Porsche-spec RE-71R's - 245/35R20 in front, 295/30R20 in the rear - this latter setup definitely has better traction than the stock MPSS.

NOW - for this season - I still have the same RE-71R's on my 666M's - but I just got the MP HAS - and on the street - WOW - the grip I get from the combination of the RE-71R plus the lowered suspension setting is noticeably better - especially maintaining traction using throttle coming out of corners (again - street driving) - and although I cannot really test this on public roads, it feels like I'd be able to throttle-steer the car more precisely with the MP HAS and RE-71R's combined. When I have my first track event coming up in a few weeks - I'll be able to verify at that time (cannot wait)!!!

I'll definitely report back here after that next track event. Good luck either way,

[Powerslide]

Originally Posted by Ca86108

Nice....I would think 245's would be way too narrow. Did you get better times on this re71 setup?

Yes - I did get better times - but part of this I believe was drier conditions compared to last time and more experience since I last ran this particular track.

That being said - I experienced a little understeer at times - but not sure if this was directly because of the 245/295 front/rear setup vs just coming into the turn a little too fast (or a combination of both). The only thing I can say is that my times do keep getting better on this setup regardless of whether it is or is not, in whole or in part - due to this setup. I was by far one of the fastest drivers in the intermediate group this past weekend - so the 245/295 setup front/rear did not prevent that

Bottom line - for next year I need to go to dedicated track wheels and tires. But for only occasional track days in 2020 - for now this setup is working fine.

[biofluke]

I just found out from tire rack that the 295/30/20 RE71Rs have been discontinued. Bummer.

[NYG]

Originally Posted by avantix

I haven't seen many serious enthusiasts on OEM anything to be honest. First they don't offer optimal width and second they are on the heavier side. If you intend on tracking 3-4+ days a year it makes sense to get a set of dedicated track wheels and tires that you can swap on and off. I run 18" Apex EC7 on track and daily the OEM CS wheels

Your CS wheels blow the EC7s out of the water in terms of weight. The EC7 is quite a few steps down from the 763Ms.

I use both whenever it makes sense but EC7 is the primary so I can run 305s and cheaper tires.