What size tyres on 17" fronts?

[Ant.]

From calculations it seems 225/40 17 would work ,but they dont seem a common size?

Who has 17" on the front? or even all round?

[SILICONEKID340HP]

205/55/15 606mm Dia

215/40/17 604mm Dia

http://www.alloywheels.com/Tyre_Calculator

[gbtvr]

I am running 215/45/17 on front and 245/40/17 on the back. (See Pic on profile for how tyre looks on split rim Compomotive)

[gammav]

SP12 rims... Front 215/40 17; Rear 245/35 18

[Marty V8]

245/40/17 rear
235/40/17 front.

[dnb]

Same size Tyres as gbtvr on mine.

[GasDoc]

I would go for 215/40/17 on the front. Good low profile look without being too OTT. I have 17" wheels at front and 18s at the rear.

[Jammy Dodger]

Matt Lee told me in person : 235/40/17 works best

[dumbfunk]

I'm running 17s all round with a 215/40 on the front and 245/40 on the rear which gives a virtually identical rolling radius.
Tyres are Toyo T1R.

[Ant.]

dumbfunk said:

I'm running 17s all round with a 215/40 on the front and 245/40 on the rear which gives a virtually identical rolling radius.
Tyres are Toyo T1R.

Cheers, 225/40 must be even closer profile to 245/40 then?

So either 215/40 or 225/40 on the fronts......

[SILICONEKID340HP]

Jammy Dodger said:

Matt Lee told me in person : 235/40/17 works best

Was he the karati kid

Cheers, 225/40 must be even closer profile to 245/40 then?
You need to create that 1" difference by having a higher wall height on the rears because you are running 17" on all four corners .

Best way to achieve this is to run

Front 215/40/17 604mm

Rear 245/40/17 628mm wall height difference 24mm which is perfect,this will compensate for having 17" wheels front and rear.

Both tyres are around 3mm smaller in diameter next to the standard setup, so its the best your going to get.

Edited by SILICONEKID340HP on Friday 27th January 21:19

[Jammy Dodger]

SILICONEKID340HP said:

Jammy Dodger said:

Matt Lee told me in person : 235/40/17 works best

Was he the karati kid

Edited by SILICONEKID340HP on Friday 27th January 21:19

Yeah, maybe he was

And on his day off was the guy behind developing the SP12 wheels for chims and griffs

[dumbfunk]

Ant. said:

Cheers, 225/40 must be even closer profile to 245/40 then?

So either 215/40 or 225/40 on the fronts......

Well, what you're trying to do is match the rolling radius of the original wheels. At the front (most of) these were 15" with 205/55/15 tyres and my solution is near identical. Other sizes will fit of course but I felt that this (plus matching the offset exactly) was the best way to guarantee I had no rubbing issues on full lock and retained the steering geometry as standard.

The original rears of course were 245/45/16 and whilst steering isn't an issue, interference under full compression and gear ratios potentially are so again the size I chose was within a couple of percent the same.

Edited by dumbfunk on Friday 27th January 21:49

[SILICONEKID340HP]

Jammy Dodger said:

SILICONEKID340HP said:

Jammy Dodger said:

Matt Lee told me in person : 235/40/17 works best

Was he the karati kid

Edited by SILICONEKID340HP on Friday 27th January 21:19

Yeah, maybe he was

And on his day off was the guy behind developing the SP12 wheels for chims and griffs

SP 12`s were already designed ,there called team Dynamics Pro Race 1.2

Only difference is the paint finish and no letters around the rim,i do think the SP12`s look better without the letters..Think they did some deal with Team Dynamics to loose the letters..




and about half the price ..

Edited by SILICONEKID340HP on Friday 27th January 22:02

[Jammy Dodger]

SILICONEKID340HP said:

Jammy Dodger said:

SILICONEKID340HP said:

Jammy Dodger said:

Matt Lee told me in person : 235/40/17 works best

Was he the karati kid

Edited by SILICONEKID340HP on Friday 27th January 21:19

Yeah, maybe he was

And on his day off was the guy behind developing the SP12 wheels for chims and griffs

SP 12`s were already designed ,there called team Dynamics Pro Race 1.2

Only difference is the paint finish and no letters around the rim,i do think the SP12`s look better without the letters..Think they did some deal with Team Dynamics to loose the letters..




and about half the price ..

Edited by SILICONEKID340HP on Friday 27th January 22:02

I didnt say he designed them Daz, i said developed them
....and offsets

When i was in the market for bigger wheels and unsure about wheels/tyre sizes, the engine builder said Matt Lee was the man to ask. Tim at ACT said exactly the same.