Rear Tyres
Rear Tyres
Author
Discussion

CHIMV8

Original Poster:

2,782 posts

244 months

Friday 15th January 2016
quotequote all
Can you see any major issues fitting 265 40 17 to the rears.

Know its tight but no track days,just general road use

SILICONEKID345HP

14,997 posts

254 months

Friday 15th January 2016
quotequote all
These are 255 40/17 ,just cleared one side and caught the other .

They can also catch the outrigger especially when banking and cornering .





Edited by SILICONEKID345HP on Friday 15th January 17:13

CHIMV8

Original Poster:

2,782 posts

244 months

Friday 15th January 2016
quotequote all
SILICONEKID345HP said:
These are 22540/17 ,just cleared one side and caught the other .

They can also catch the outrigger especially when banking and cornering .

Take it you don't mean 225 Daz??



SILICONEKID345HP

14,997 posts

254 months

Friday 15th January 2016
quotequote all
CHIMV8 said:
Sorry 255 40/17

jesfirth

1,743 posts

265 months

Friday 15th January 2016
quotequote all
I have 255 40 17's on my griff. Very tight but just work. I had to trim the inner well arch though.

hillclimbmanic

678 posts

167 months

Friday 15th January 2016
quotequote all
jesfirth said:
I have 255 40 17's on my griff. Very tight but just work. I had to trim the inner well arch though.
What size is your wheel, jesfirth? Also the offset, any spacers, etc...

Manic

CHIMV8

Original Poster:

2,782 posts

244 months

Friday 15th January 2016
quotequote all
CHIMV8 said:
SILICONEKID345HP said:
These are 22540/17 ,just cleared one side and caught the other .

They can also catch the outrigger especially when banking and cornering .

Take it you don't mean 225 Daz??



That looks miles closer than mine would ever be,how low have you got the car?

Took some straight line measures and sure will fit under arch,all be it i may have to slightly space out from the inside?

Edited by CHIMV8 on Friday 15th January 22:57

QBee

22,108 posts

167 months

Saturday 16th January 2016
quotequote all
Wheel width is the first issue here - you will need minimum 8.5J, ideally 9J or 9.5J wheels. Do you have these?

Second issue is catching, as Daz says. 235 Toyo 888s caught on my car until I raised the ride height, and when I tried to lend them to another Chim owner at a track day, he laid enough smoke to hide him from advancing BMW/Merc/Audi/Porsche owners. We ended up having to swap all 8 wheels over between our cars. It's not just how they fit with the car standing still, there needs to be enough space to handle cornering, compression over bumps etc.

Third issue is why bother? Why spend money just to give yourself problems? Phazed had done the wide wheels thing on his monster Chim (390 BHP), but he has trimmed the wheel arches to accommodate them and the main joy in his motoring life is track days and sprint days.

Fourth issue is what do you hope to gain? I am not convinced you will get any more grip, or better handling. These cars are light weight and the tyres need to bite through the grease on the roads. TVR specced 205 front and 225 as the rear width. I have done a load of track days on 215 all round and been very happy with the handling. It was no better with 235 rears.

CHIMV8

Original Poster:

2,782 posts

244 months

Saturday 16th January 2016
quotequote all
QBee said:
Wheel width is the first issue here - you will need minimum 8.5J, ideally 9J or 9.5J wheels. Do you have these?

Second issue is catching, as Daz says. 235 Toyo 888s caught on my car until I raised the ride height, and when I tried to lend them to another Chim owner at a track day, he laid enough smoke to hide him from advancing BMW/Merc/Audi/Porsche owners. We ended up having to swap all 8 wheels over between our cars. It's not just how they fit with the car standing still, there needs to be enough space to handle cornering, compression over bumps etc.

Third issue is why bother? Why spend money just to give yourself problems? Phazed had done the wide wheels thing on his monster Chim (390 BHP), but he has trimmed the wheel arches to accommodate them and the main joy in his motoring life is track days and sprint days.

Fourth issue is what do you hope to gain? I am not convinced you will get any more grip, or better handling. These cars are light weight and the tyres need to bite through the grease on the roads. TVR specced 205 front and 225 as the rear width. I have done a load of track days on 215 all round and been very happy with the handling. It was no better with 235 rears.
I have Phazed old wheels,and currently have the 245 45 17,which look slightly stretched and would like to fill the arch a bit more.

The wheels on the car look the dogs, and i am really chuffed with them,so just want to maximise the look QBEE

phazed

22,454 posts

227 months

Saturday 16th January 2016
quotequote all
You will have to trim the arches for definite clearance.

It is a very easy job and no more than 2 to 3 hours work.

You will then have plenty of clearance at the arches and on my 5.5, with 265s this also clears the inner chassis outriger diagonals no problem.

phazed

22,454 posts

227 months

Saturday 16th January 2016
quotequote all
There is a 255 x 40 x 17 Toyo R1R next to a 265 x 35 x 18 Toyo 888.

Both require a little trimming of the arches.


CHIMV8

Original Poster:

2,782 posts

244 months

Saturday 16th January 2016
quotequote all
CHIMV8 said:
QBee said:
Wheel width is the first issue here - you will need minimum 8.5J, ideally 9J or 9.5J wheels. Do you have these?

Second issue is catching, as Daz says. 235 Toyo 888s caught on my car until I raised the ride height, and when I tried to lend them to another Chim owner at a track day, he laid enough smoke to hide him from advancing BMW/Merc/Audi/Porsche owners. We ended up having to swap all 8 wheels over between our cars. It's not just how they fit with the car standing still, there needs to be enough space to handle cornering, compression over bumps etc.

Third issue is why bother? Why spend money just to give yourself problems? Phazed had done the wide wheels thing on his monster Chim (390 BHP), but he has trimmed the wheel arches to accommodate them and the main joy in his motoring life is track days and sprint days.

Fourth issue is what do you hope to gain? I am not convinced you will get any more grip, or better handling. These cars are light weight and the tyres need to bite through the grease on the roads. TVR specced 205 front and 225 as the rear width. I have done a load of track days on 215 all round and been very happy with the handling. It was no better with 235 rears.
I have Phazed old wheels,and currently have the 245 45 17,which look slightly stretched and would like to fill the arch a bit more.

The wheels on the car look the dogs, and i am really chuffed with them,so just want to maximise the look QBEE
Heres a pic to show what i am getting at


QBee

22,108 posts

167 months

Saturday 16th January 2016
quotequote all
Excellent, they look the nuts of the mutt.
And it explains why you want to do it, and that you already have the wheels.

You can achieve a lot of what you are trying to do by raising your ride height a tad.
Not masses, maybe just half an inch to an inch. It's how I got my 235 Toyo 888s to fit without rubbing.
And the rest can be achieved with a little shaving of the car's armpits.
If you're in any doubt as to method, Monsieur Phazed may well be willing to show off his two post lift and help you with it - he's a daycent fella. clap

Bon chance, mon ami.

phazed

22,454 posts

227 months

Saturday 16th January 2016
quotequote all
These are my road wheels.

17x9" on the rears shod with 255/40/17 R1Rs.

As QBee stated, ride height needs to be correct.




When I had those Image wheels on my 4.6 Chim, I had 255 x 40 x 17 on the rear, set at the correct ride height and did not have much of a problem on the road.

The first track day I did at Brands Hatch, I had smoke pouring off the wheel arches due to far higher cornering speeds.

.

QBee

22,108 posts

167 months

Saturday 16th January 2016
quotequote all
I have just fitted a pair of 225/45 17 Toyo R1Rs on my car, front wheels. Wider than I would have chosen, due to poor choice of sizes.
Grrrr. Catching on full lock, back of the headlight inspection panel, nowhere else. So I will try half an inch all around onto the ride height, see if I can stop it.

phazed

22,454 posts

227 months

Saturday 16th January 2016
quotequote all
I use 235/40/17s that don't catch.

Even if they only catch on full lock I would not worry about it .

QBee

22,108 posts

167 months

Saturday 16th January 2016
quotequote all
phazed said:
I use 235/40/17s that don't catch.

Even if they only catch on full lock I would not worry about it .
That's because while yours are wider, mine are a bigger diameter, by just over half an inch.
It's only on full lock, and then only scuffing gently, so I will just have to avoid supermarket car parks until they have worn down a tad..

CHIMV8

Original Poster:

2,782 posts

244 months

Saturday 16th January 2016
quotequote all
QBee said:
I have just fitted a pair of 225/45 17 Toyo R1Rs on my car, front wheels. Wider than I would have chosen, due to poor choice of sizes.
Grrrr. Catching on full lock, back of the headlight inspection panel, nowhere else. So I will try half an inch all around onto the ride height, see if I can stop it.
Antoney
I have exact same tyres,only rubs on full lock,on inspection on mates ramp,i need to add 3mm spacer and problem solved

CHIMV8

Original Poster:

2,782 posts

244 months

Saturday 16th January 2016
quotequote all
phazed said:
These are my road wheels.

17x9" on the rears shod with 255/40/17 R1Rs.

As QBee stated, ride height needs to be correct.




When I had those Image wheels on my 4.6 Chim, I had 255 x 40 x 17 on the rear, set at the correct ride height and did not have much of a problem on the road.

The first track day I did at Brands Hatch, I had smoke pouring off the wheel arches due to far higher cornering speeds.

.
Going to find some worn tyres and try 255 40 17 and 265 40 17 then take the plunge.....seems every Chim is different due to hand build

SILICONEKID345HP

14,997 posts

254 months

Saturday 16th January 2016
quotequote all
Don`t forget the outriggers ,jack the near side up high as possible ,255`s caught the outrigger..

I also tried 215/45/17 on the front ,they cause me problems at Cadwell. They caught on compression .


I would go for 255`s for the rears but don`t make a balls up like me confused

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

I was so stressed eek




Edited by SILICONEKID345HP on Saturday 16th January 20:31


Edited by SILICONEKID345HP on Saturday 16th January 20:33