295/35? on 18x11 or ?? Looks great!Late to the party... Here's my car with Apex wheels on + 295 square a052s.
My same concern on track. You absolutely turn off everything but ABS when you feel confident controlling the car at its limits (on track ofc). Big advantage of this Supra being built with that in mind and nice big button on the center console to turn it all off. All the track regulars (like @romanLegion9574, @Rocksandblues and @razorlab - not to leave anyone out but not to piss off too many peeps in these tags either) I'm pretty confident they're not running stock wheels/tires and not getting their traction or diff overriding or kicking on under extreme conditions (regular HPDE driving). I couldn't imagine leaving those electronic nannies on, on track. However, I do want them turned back on in real world everyday street driving with all the nutjobs who don't follow the rules... Speedometer accuracy would be another concern. It's no biggie on track while using some kind of Aims data logger or track app but I wouldn't want that stuff hooked up daily. So great question! And think it applies to this thread. I've never wanted to run my "track" wheels all the time on any other track car. Now I do...
If you can believe it, I only have it one click off on track. I don't turn it fully off. The car is still plenty fast. There are times where it intervenes but almost every time it's a "car just saved me" moment. 98% of the time there is no intervention.My same concern on track. You absolutely turn off everything but ABS when you feel confident controlling the car at its limits (on track ofc). Big advantage of this Supra being built with that in mind and nice big button on the center console to turn it all off. All the track regulars (like @romanLegion9574, @Rocksandblues and @razorlab - not to leave anyone out but not to piss off too many peeps in these tags either) I'm pretty confident they're not running stock wheels/tires and not getting their traction or diff overriding or kicking on under extreme conditions (regular HPDE driving). I couldn't imagine leaving those electronic nannies on, on track. However, I do want them turned back on in real world everyday street driving with all the nutjobs who don't follow the rules... Speedometer accuracy would be another concern. It's no biggie on track while using some kind of Aims data logger or track app but I wouldn't want that stuff hooked up daily. So great question! And think it applies to this thread. I've never wanted to run my "track" wheels all the time on any other track car. Now I do...
Thanks for picking up a set!
Its not currently in the works, but we may revisit this 18x10.5" option as we did used to offer it in our EC-7R Classic Line Forged wheel design. Having that many fitments for a single chassis is difficult to justify from a production and stocking standpoint, but I'd love to make it work. For now our 18x10 ET30 and 18x11 ET40 square fitments cover quite a bit of ground on the 18" square fitments side of thing although I admit the mods the 18x11 ET40s require can be intimidating.
This reply is turning into a quote fest and I don't want to include all the other replies to your question to keep it compact. They have more experience with this platform on track and have great advice. From what I've seen with the Supra and other (forgive me) BMW based RWD platforms, their traction and stability control systems seem fairly adaptable in terms of the combinations of different front and rear tire diameters and aren't nearly as sensitive to a diameter change (ie overall diameter of wheel + tire) as one might expect. You can still get into trouble if you go way off the mark, but I have supra customers running less aggressive square setups on the street with all the systems on that haven't had issues with traction or stability control.Somewhat tangential to thread... but I'll show 'em when they're on - so maybe not.
I'm wondering if any physics nerds (or track mechanics) could weigh in on the pros/cons of matched diameter vs. factory difference. I'll elaborate with numbers based on 19" SM-10's because that's what's going on (honestly it's the same 19" so whatever... but subtle differences based on widths):
Option 1: Front (9.5") 265/35 - Rear (11") 305/30 - this makes the rolling diameter almost exactly the same for front and rear: 668mm front and 666mm rearObviously this appeals for a variety of reasons... but mostly because the sidewall height is nearly identical.
Option 2: Front 275/35 & Rear 295/35 - this makes both larger (taller) by a bit - but keeps the difference in size equal to that of the OEM setup. In this case 675mm front and 689mm rear - a difference of 14mm, larger rears.
The factory 19" setup is the same difference, but smaller diameter : 255/35 & 275/55 = 661mm & 675mm F/R (14mm larger rears).
I realize this is mostly academic - I doubt either setup would be a big problem, but I assume all the handling and safety systems are tuned to expect the rear wheels to turn at a rate slightly slower than the fronts at all times due to larger diameter.
Since people are running square setups without issues, I'm planning on going with Option 1 - which is a recommended fitment. I'd just be curious on whether traction control engages a bit more often on similar/identical F/R setups. At a guess, everyone running square setups is track-focused and likely has theirs TCS turned off all the time?
Sorry for the novel.
Epic setup! Mind If I add your photos to the 18x11 square thread with notes? Would love to get the alignment specs and fitment notes from you when you have a chance to reply. Thanks for picking up a set!Late to the party... Here's my car with Apex wheels on + 295 square a052s.
Yes totally.
Satin Black time! Glad to see these out in the wild. They look great!Apex SM-10
Front
19x9.5 ET 25
275/35-19 Michelin pilot super sports
Rear
19x11 ET 40
305/30-19 Toyo R888R
Stock Suspension
Stock alignment
No problem Tom. Feel free to post them.
Wouldn't hurt to have that option. I had originally intended to swap my Toyota caps over to the VS-5RS, but forgot to ask the shop doing the install to do so. I then sold the OEM wheels shortly after, not to mention the Apex caps grew on me.
Are you running spacers? Looks like there might be, at least on the front, but just wanted to confirm. Sweet setup!Apex SM-10
Front
19x9.5 ET 25
275/35-19 Michelin pilot super sports
Rear
19x11 ET 40
305/30-19 Toyo R888R
Stock Suspension
Stock alignment
No spacers, in the front it most probably could hold a 10mm spacer to sit it closer to the fender but there really is no need. Love the stance! Apex got it right with the offsets as expected.Are you running spacers? Looks like there might be, at least on the front, but just wanted to confirm. Sweet setup!
