Alignment spreadsheet

[Subydude]

I do have a tiny bit more stretch than before. Went from 295/30 on an 18x10.5 to a 295/30 on a 18x11.

So are you essentially recommending running 275/35 on an 18x11 wheel? That's a lot of stretch, no? I'd also be worried about giving up, well, tire.

A 295/35 is heavy ass tire, and that would worry me as well. There's a 2lb difference per tire.

I run a 275/35/18 on a 10.5 and it's pretty good. Were I running a 295 I'd want an 11 or 11.5. A 275 on an 11 would be chasing tire feedback IMO, but still not out of the question. You're not giving up tire with stretch (to a point obviously), just supporting it better.

Weight is always at a premium. That said, the taller sidewall on the 295/35 seems to help people put power down (anecdotal evidence only here since I've not run them personally).

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[razorlab]

I do have a tiny bit more stretch than before. Went from 295/30 on an 18x10.5 to a 295/30 on a 18x11.

So are you essentially recommending running 275/35 on an 18x11 wheel? That's a lot of stretch, no? I'd also be worried about giving up, well, tire.

A 295/35 is heavy ass tire, and that would worry me as well. There's a 2lb difference per tire.

I'm not recommending 275/35 on a 18x11 although some have done that with success. 295/30 on a 11 sounds good. Def better than a 295 on anything smaller than a 11" wide wheel.

Here are the combos I have personally used on my Supra so far:

295/30/18 on 18x10.5 (Conti Force)
275/40/18 on 18x10.5 (CRS V1 and V2)
275/35/18 on 18x10.5 (Kumho V730)
295/35/18 on 18x10.5 (CRS V2)
295/35/18 on 18x11 (RE71RS)
295/30/18 on 18x11 (Vitour P1)
275/35/19 on 19x10 (AR1)

So far, I have been fastest with a 295/35/18 RE71RS on 18x11. This has also been the best overall package for me. Good steering feel, good lateral and accel grip, etc. It does everything well for me, including multi-tasking, which is super important on the tracks I frequent. Putting power down with almost 600wtq is also key. The 30's and 275/35's sucked for that part. The 40's were good at that but never felt "settled" in lateral grip so was more about trusting it. They were also not so great at multi-tasking, but more because the sidewall would "pop" when quickly transitioning and with bigger steering wheel corrections.

Vitour's were absolute trash at everything excluding steering feel because their sidewalls are basically iron plates. They were also BY FAR the worst at multi-tasking. As in, they only like doing one thing at once and leave the chat when asked to do more than one thing. The front and rear of the car felt like I was driving two different cars at once with these tires. Dallas is also a slimy prick that lies out his teeth so fuck that tire and company for all the reasons.

 

[TBK]

I run a 275/35/18 on a 10.5 and it's pretty good. Were I running a 295 I'd want an 11 or 11.5. A 275 on an 11 would be chasing tire feedback IMO, but still not out of the question. You're not giving up tire with stretch (to a point obviously), just supporting it better.

Weight is always at a premium. That said, the taller sidewall on the 295/35 seems to help people put power down (anecdotal evidence only here since I've not run them personally).

I'm not recommending 275/35 on a 18x11 although some have done that with success. 295/30 on a 11 sounds good. Def better than a 295 on anything smaller than a 11" wide wheel.

Here are the combos I have personally used on my Supra so far:

295/30/18 on 18x10.5 (Conti Force)
275/40/18 on 18x10.5 (CRS V1 and V2)
275/35/18 on 18x10.5 (Kumho V730)
295/35/18 on 18x10.5 (CRS V2)
295/35/18 on 18x11 (RE71RS)
295/30/18 on 18x11 (Vitour P1)
275/35/19 on 19x10 (AR1)

So far, I have been fastest with a 295/35/18 RE71RS on 18x11. This has also been the best overall package for me. Good steering feel, good lateral and accel grip, etc. It does everything well for me, including multi-tasking, which is super important on the tracks I frequent. Putting power down with almost 600wtq is also key. The 30's and 275/35's sucked for that part. The 40's were good at that but never felt "settled" in lateral grip so was more about trusting it. They were also not so great at multi-tasking, but more because the sidewall would "pop" when quickly transitioning and with bigger steering wheel corrections.

Vitour's were absolute trash at everything excluding steering feel because their sidewalls are basically iron plates. They were also BY FAR the worst at multi-tasking. As in, they only like doing one thing at once and leave the chat when asked to do more than one thing. The front and rear of the car felt like I was driving two different cars at once with these tires. Dallas is also a slimy prick that lies out his teeth so fuck that tire and company for all the reasons.

I'm def settled on 295 right now, considering i have a wheel that can support the width, and a 295 is just going to be faster. Bryan i remember you being a bit iffy on whether my other wheels (10.5") were wide enough for 295s, which i thought were fine tbh, but the 11s are def a great fit.

I did consider trying a taller tire, 295/35, but i'm a little hesistant. It's still going to feel great, but won't have the same sharp feeling as a 295/30. I also really don't want the added weight on all 4 corners.

I know you said you were fastest in a 295/35 RE71RS, but i wish you also tried a 295/30 on that same tire. The 2 times you tried that size were 1) on a narrower wheel and 2) with a tire you hated.

Worth noting that our tracks are silky smooth. Both Dubai Autodrome and Yas Marina (obv, an F1 track) are smooth as butter. So one of the key advantages of a bigger sidewall is really of no use to me. I don't need any curb compliance.

I'm not closing the door on trying it, and i'll probably do it at some point, but it will be very specifically to test the more progressive breakaway characteristics. Who knows i might feel silly about not giving a shot sooner.

 

[Subydude]

I'm def settled on 295 right now, considering i have a wheel that can support the width, and a 295 is just going to be faster. Bryan i remember you being a bit iffy on whether my other wheels (10.5") were wide enough for 295s, which i thought were fine tbh, but the 11s are def a great fit.

I did consider trying a taller tire, 295/35, but i'm a little hesistant. It's still going to feel great, but won't have the same sharp feeling as a 295/30. I also really don't want the added weight on all 4 corners.

I know you said you were fastest in a 295/35 RE71RS, but i wish you also tried a 295/30 on that same tire. The 2 times you tried that size were 1) on a narrower wheel and 2) with a tire you hated.

Worth noting that our tracks are silky smooth. Both Dubai Autodrome and Yas Marina (obv, an F1 track) are smooth as butter. So one of the key advantages of a bigger sidewall is really of no use to me. I don't need any curb compliance.

I'm not closing the door on trying it, and i'll probably do it at some point, but it will be very specifically to test the more progressive breakaway characteristics. Who knows i might feel silly about not giving a shot sooner.

295 on a 10.5 isn't the worst, and would likely be faster than a 275 on a 10.5, but it won't feel as good and you'll need to be ready for the squish.

Again, I haven't driven this particular car on a 295/30 or 295/35, but the people I know who have tested those two tires have said the 35 doesn't lose feel or crispness in a seat of the pants measurable way, and does improve forward bite.

My only testing regarding sidewall size on this platform was between tire manufacturers, which isn't really good data IMO. I do plan on trying the 295/35 RZ when it comes out but only on the rear of the car with the same old 275/35/18 in front.

I would guess, based on the smooth circuits, that you'd really only see an improvement in power application more so than bump compliance. Taller sidewalls tend to store energy better (glossing over a bunch of variables), at least up until they get too floppy and the car takes too long to transfer load.

 

[razorlab]

I'm def settled on 295 right now, considering i have a wheel that can support the width, and a 295 is just going to be faster. Bryan i remember you being a bit iffy on whether my other wheels (10.5") were wide enough for 295s, which i thought were fine tbh, but the 11s are def a great fit.

I did consider trying a taller tire, 295/35, but i'm a little hesistant. It's still going to feel great, but won't have the same sharp feeling as a 295/30. I also really don't want the added weight on all 4 corners.

I know you said you were fastest in a 295/35 RE71RS, but i wish you also tried a 295/30 on that same tire. The 2 times you tried that size were 1) on a narrower wheel and 2) with a tire you hated.

Worth noting that our tracks are silky smooth. Both Dubai Autodrome and Yas Marina (obv, an F1 track) are smooth as butter. So one of the key advantages of a bigger sidewall is really of no use to me. I don't need any curb compliance.

I'm not closing the door on trying it, and i'll probably do it at some point, but it will be very specifically to test the more progressive breakaway characteristics. Who knows i might feel silly about not giving a shot sooner.

Yea, I was faster on a 275/35 and 275/40 on 10.5 than a 295/35 on a 10.5. This also checks with many published tests. The CRS just doesn't have a stiff enough sidewall. It felt like the car had active yaw in the back which destroyed confidence and the front would constantly snap out of the grip window in high demand turns. If I remember correctly, I was 1.4 secs faster on 275/35/18 V730's on a 10.5 than I was with the CRS V2 295/35/18 on a 10.5

One thing to mention that I forgot is gearing. This will be track and power dependent of course. With the 295/30 I constantly ran out of gearing at my main local track.

This is not a scientific test whatsover, but here is a comparison I did last year on different tire/size/wheel on the same track, between two days. It also makes me want to try out the 295/35/18 V730's that just came out (275 used to be the widest size in that tire in 18")

 

[FLtrackdays]

Last I was running:
Camber targeted -3.4 front, -2.7 rear
Toe 0.5mm out front, 2mm in rear
On 275/35-18s with 10mm spacers all around

 

[i3igpete]

Last I was running:
Camber targeted -3.4 front, -2.7 rear
Toe 0.5mm out front, 2mm in rear
On 275/35-18s with 10mm spacers all around

Was that total toe or each side?

 

[Kujiwara]

nice one haha. The old setup was neutral with stock staggered setup but went through front tires quickly at the track.
My new setup -3 camb and 0.05 deg toe in per side on the front, -2.3 camb and 0.18 toe in per side rear. With 275 square tires, it is got a lot more turn-in than before, and i think ultimately now there is more grip than the rear, more prone to oversteer at the limit, I will be balancing it out with an Eibach front sway bar this year. The high toe-in in the rear is still keeping the rear planted from bumps, lift-off and corner exit. -3 camber was enough to wear tires evenly for me at the track.

Edit: could add a column for staggered or sqaure in the sheet

 

[FLtrackdays]

Was that total toe or each side?

Total. And that was on a square setup @Kujiwara

 

[Alex117]

Mine if you want to add it.
Would be interested in any advice.
None of it is adjustable and I’m considering getting some suspension secrets bits and changing it but not sure what to aim for?

 

[i3igpete]

Mine if you want to add it.

Uhhh that front left doesnt seem correct for a completely stock car. Was your car in an accident?

 

[Alex117]

Not as far as I know. Had it for about a year.

think it’s been lowered in a previous life

 

[i3igpete]

Not as far as I know. Had it for about a year.

think it’s been lowered in a previous life

In that case, I would pop off the strut cover on that side and see if there's a secret camber plate hiding there. Otherwise, if the lower control arm is stock, something's bent

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