GR Yaris TE37 SAGA S-PLUS - 18x9,5 +45 for track us

Dragos_DreS

Fascinated Member
May 18, 2023
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46
13
Hi Guys,

Can anyone tell me if the TE37 SAGA S-PLUS in 18x9,5 +45 on coilovers are a good idea for track use?

Currently my GR Yaris is in the shop getting a ton of work done . Originally, I thought of doing the wheels at a later time but I did come across a very nice set of the TE37 SAGA S-PLUS and I'm not sure if the wheel size 18x9,5 +45 is a good size for track use.

What do you think?

A.
 

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Humptydumptyhadabigone

Zookeeper
Staff member
Dec 17, 2021
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What rubber are you wanting to run? That determines width. Offset is a balance between scrub radius and hitting bits. I just run standard width and offset and 235/40 so no help. What suspenders the car wears and camber will dictate width at that offset. @Phil1291 might be your best bet.

 
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Dragos_DreS

Fascinated Member
May 18, 2023
27
46
13
What rubber are you wanting to run? That determines width. Offset is a balance between scrub radius and hitting bits. I just run standard width and offset and 235/40 so no help. What suspenders the car wears and camber will dictate width at that offset. @Phil1291 might be your best bet.


18x9,5 +45 with a 255/35 tire.

"Yes, with specific camber setting". Not sure if that camber setting is suited for the track or just for the road.

I need to know what would be the perfect wheel and tire size for the track.
 

DesmondWheelsEU

Devoted member
Vendor
Nov 27, 2022
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Bedfordshire
Feedback from a customer running 18x10 +35, is that 18x9.5 +40-45 is the sweet spot. It depends partially on the clearance afforded by the suspension and ride height you're running.

He was getting slight rubbing with a 265 tyre on the 10" wheel, changed to a 9.5" with a slightly milder offset and had no problem on track. Keeping the 10" for the street.
 

Dragos_DreS

Fascinated Member
May 18, 2023
27
46
13
Tires are now my next challenge... the wheels are 18x9,5 +45

Tires:
265/35 ?
255/35 ?


Please keep in mind that the car is mainly for track use.

Many thanks in advance.
 
Last edited:

Phil1291

Totally Hooked
Vendor
Dec 16, 2021
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Hey Mate
There are a hundred different options for that. Even for track use.
The problem with tires and wheels that size are, it‘s most likely gonna rub somewhere.

Can you run different top mounts?
Can you run for example the Verkline wishbone?

9,5x18“ ET45 is the perfect wheel for scrub radius but it will rub on the damper when you run more than roughly -2 degrees of camber with just camber bolts.

I explain that in this video:


And with 255/265 tires on track you want to run -3 or more camber, so that doesn‘t work.

So you either need less offset, bad for scrub radius plus with less offset it will rub in the wheel arch faster, smaller wheels/tires, bad for grip, less camber, bad for handling or different top mounts (to move the damper more inwards) and wishbones (to move the bottom of the wheel more outwards) to make it work.
But depending on your suspension, you maybe can‘t run topmounts because they don’t fot or there aren‘t any or they‘re not street legal.

And 265/255 isn‘t the same width on every tire.
See attached pic of the Yokohama A052 and the Pirelli Trofeo R both in 265/35. The Trofeo R is ~285mm wide.
255/35 and 265/35 there are certain tires available and certain aren‘t, so you also need to decide which tires you want to run and than commit to that.

So as you can see, there‘s a hundred different answers to your relatively simple question. 😉

IMG_0885.jpeg
 

DesmondWheelsEU

Devoted member
Vendor
Nov 27, 2022
99
155
33
Bedfordshire
Hey Mate
There are a hundred different options for that. Even for track use.
The problem with tires and wheels that size are, it‘s most likely gonna rub somewhere.

Can you run different top mounts?
Can you run for example the Verkline wishbone?

9,5x18“ ET45 is the perfect wheel for scrub radius but it will rub on the damper when you run more than roughly -2 degrees of camber with just camber bolts.

I explain that in this video:


And with 255/265 tires on track you want to run -3 or more camber, so that doesn‘t work.

So you either need less offset, bad for scrub radius plus with less offset it will rub in the wheel arch faster, smaller wheels/tires, bad for grip, less camber, bad for handling or different top mounts (to move the damper more inwards) and wishbones (to move the bottom of the wheel more outwards) to make it work.
But depending on your suspension, you maybe can‘t run topmounts because they don’t fot or there aren‘t any or they‘re not street legal.

And 265/255 isn‘t the same width on every tire.
See attached pic of the Yokohama A052 and the Pirelli Trofeo R both in 265/35. The Trofeo R is ~285mm wide.
255/35 and 265/35 there are certain tires available and certain aren‘t, so you also need to decide which tires you want to run and than commit to that.

So as you can see, there‘s a hundred different answers to your relatively simple question. 😉

View attachment 16912


Is this based on using standard shocks & springs?
 

Dragos_DreS

Fascinated Member
May 18, 2023
27
46
13
oh yea, thank you for making my l
Hey Mate
There are a hundred different options for that. Even for track use.
The problem with tires and wheels that size are, it‘s most likely gonna rub somewhere.

Can you run different top mounts?
Can you run for example the Verkline wishbone?

9,5x18“ ET45 is the perfect wheel for scrub radius but it will rub on the damper when you run more than roughly -2 degrees of camber with just camber bolts.

I explain that in this video:


And with 255/265 tires on track you want to run -3 or more camber, so that doesn‘t work.

So you either need less offset, bad for scrub radius plus with less offset it will rub in the wheel arch faster, smaller wheels/tires, bad for grip, less camber, bad for handling or different top mounts (to move the damper more inwards) and wishbones (to move the bottom of the wheel more outwards) to make it work.
But depending on your suspension, you maybe can‘t run topmounts because they don’t fot or there aren‘t any or they‘re not street legal.

And 265/255 isn‘t the same width on every tire.
See attached pic of the Yokohama A052 and the Pirelli Trofeo R both in 265/35. The Trofeo R is ~285mm wide.
255/35 and 265/35 there are certain tires available and certain aren‘t, so you also need to decide which tires you want to run and than commit to that.

So as you can see, there‘s a hundred different answers to your relatively simple question. 😉

View attachment 16912


LoL... not sure if you are making my life easier or harder! 😅

I was actually watching your videos last night, great info and exactly what I was looking for. But this post made me unsure again..


I am running Moton Race Suspension.. which looks like it is much thicker than the stalk suspension that you had in your video.

Do you think the top mount solution will still work?

Bellow I have included a pic from your video and a few pics of mine:
 

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Phil1291

Totally Hooked
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Dec 16, 2021
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www.roetheli-racing.ch
Is this based on using standard shocks & springs?
This is based on installing now 8 different suspension setups in 20+ GR‘s. 😉

Öhlins R&T Prototype
Öhlins R&T V1
Öhlins R&T V2
H&R Springs
KW V3
KW V4 Clubsport
H&R Clubsport
Nitron something

It doesn‘t matter. They‘re all nearly the same diameter.
And 1-2mm more or less space in static position doesn‘t change anything on my previous statement.
 

Phil1291

Totally Hooked
Vendor
Dec 16, 2021
426
1,301
168
36
Sirnach, Switzerland
www.roetheli-racing.ch
oh yea, thank you for making my l


LoL... not sure if you are making my life easier or harder! 😅

I was actually watching your videos last night, great info and exactly what I was looking for. But this post made me unsure again..


I am running Moton Race Suspension.. which looks like it is much thicker than the stalk suspension that you had in your video.

Do you think the top mount solution will still work?

Bellow I have included a pic from your video and a few pics of mine:
If it‘s thicker, that‘s worse.
The top mount helps in any case. In some it just won‘t be enough.
 
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DesmondWheelsEU

Devoted member
Vendor
Nov 27, 2022
99
155
33
Bedfordshire
This is based on installing now 8 different suspension setups in 20+ GR‘s. 😉

Öhlins R&T Prototype
Öhlins R&T V1
Öhlins R&T V2
H&R Springs
KW V3
KW V4 Clubsport
H&R Clubsport
Nitron something

It doesn‘t matter. They‘re all nearly the same diameter.
And 1-2mm more or less space in static position doesn‘t change anything on my previous statement.

Thanks for the comprehensive answer!
 

Dragos_DreS

Fascinated Member
May 18, 2023
27
46
13
If it‘s thicker, that‘s worse.
The top mount helps in any case. In some it just won‘t be enough.
I will post some pics on here once I figure it out. Thank you anyways, your videos definitely made me smarter and brought me closer to a solution.

Hope you continue to make them, they are very good!