Tyre size
#1
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Thread Starter
Tyre size
Thinking about putting bigger tyres on the rear of my car so it puts the power down better.
Currently running 215 40 17's on Comp MO's which I think are an 8J rim.
No idea what the offset is to be honest.
Question is, who is running bigger rear tyres on their cars and does it have any negative effect on the handling and or even the aesthetics.
I know a lot of modern performance stuff have larger rear boots (BM'S/911's etc).
Was considering 235's 40's or even 245 35's as the latter has a closer circumference.
Be interesting to get the experts opinions
Currently running 215 40 17's on Comp MO's which I think are an 8J rim.
No idea what the offset is to be honest.
Question is, who is running bigger rear tyres on their cars and does it have any negative effect on the handling and or even the aesthetics.
I know a lot of modern performance stuff have larger rear boots (BM'S/911's etc).
Was considering 235's 40's or even 245 35's as the latter has a closer circumference.
Be interesting to get the experts opinions
#3
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#5
PassionFord Post Troll
What diff have you got fitted mate?
#6
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Thread Starter
Think its a standard diff but has shims fitted to minimise the negative camber?
Obviously still learning about these cars lads so bear with me.
Not sure what you mean by changing the beam??
I was also thinking about the aesthetics as the 215's are like push bike tyres by todays standards, so basically grip and the looks
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#8
PassionFord Post Troll
Really like the gripper diff gives great traction, is quite noisey but doesn't bother me adds to the experience of the car
#9
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Thread Starter
To be honest an LSD would be a bit extreme and big money. I'll just put some bigger shoes on for now maybe some 225's/235's or 245's the latter will probably catch. Lee the arches have been rolled haven't they?
#10
PassionFord Post Troll
Fair play mate if you can get away with wider tyres why not, be careful though as the planet gears on the standard diff aren't the strongest.
#11
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Thread Starter
Well 235 35 17's are like rocking horse sh*t can't find them anywhere.
Do you reckon 245 35 17's with the ET30 8J rims will fit or catch the kit?
Do you reckon 245 35 17's with the ET30 8J rims will fit or catch the kit?
#12
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The tyres that are on the wheels at the moment dont look like the right width for the wheels? To me they look like they have been stretched onto rims which could take a wider tyre. I did think this when I looked at the photos you recently put up.
Maybe try some wider tyres on the current wheels and see how they perform?
Maybe try some wider tyres on the current wheels and see how they perform?
#13
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Thread Starter
The tyres that are on the wheels at the moment dont look like the right width for the wheels? To me they look like they have been stretched onto rims which could take a wider tyre. I did think this when I looked at the photos you recently put up.
Maybe try some wider tyres on the current wheels and see how they perform?
Maybe try some wider tyres on the current wheels and see how they perform?
Yes they are a bit stretched mate. They 215 40's 17" rim 8j
#15
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Thread Starter
Have to agree with that mate tyre is a lot more flush with the rim, also less chance of the dreaded kerb rash, gonna try some 245's on the rear when i'm due some new. Cannot get a suitable 235 in a 17" rim anymore
#17
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#18
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#19
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You can get Federal 595 RSR track day tyres in 235/40/17 sizes for Ł84.50 each from mytyres.co.uk. Same as what I have got on my Saff but in 215/40/17s. Good tyres with plenty of grip.
#20
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#22
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#23
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Thread Starter
Its the 235/35 17 I was looking for. This doesn't exist or I can't find any. So will no doubt go 235/40 17
#24
Advanced PassionFord User
You could try some 225/45's on the rear?
I like the rear sitting slightly higher than the fronts.
Get some decent trackday tyres and they will grip so much better
Cheers Paul
I like the rear sitting slightly higher than the fronts.
Get some decent trackday tyres and they will grip so much better
Cheers Paul
#25
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Carbon 1993. I had kuhmo Ecsta tyres on my Saff and I found them quite a hard compound and now have the Federal 595 RSR tyres which seem a bit softer and dont give such a harsh ride.
#27
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Hi,
I had 245/35/17 toyos on comps 17/8J Et33 on the rears and they fitted without scuffing. Very close though (1mm odd on squat) These tyres will keep the rolling radius the same as the fronts keeping the 215/40/17 tyres. (Not that you need to on a 2wd)
But with an et of 33 I recon you will have to take a couple of millimetres from the rear arches or machine the face of the wheel. Also be advised that different tyres of the same sizing have different overall widths/shoulder heights.
Hope this helps.
Tim
I had 245/35/17 toyos on comps 17/8J Et33 on the rears and they fitted without scuffing. Very close though (1mm odd on squat) These tyres will keep the rolling radius the same as the fronts keeping the 215/40/17 tyres. (Not that you need to on a 2wd)
But with an et of 33 I recon you will have to take a couple of millimetres from the rear arches or machine the face of the wheel. Also be advised that different tyres of the same sizing have different overall widths/shoulder heights.
Hope this helps.
Tim
#28
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Thread Starter
Hi,
I had 245/35/17 toyos on comps 17/8J Et33 on the rears and they fitted without scuffing. Very close though (1mm odd on squat) These tyres will keep the rolling radius the same as the fronts keeping the 215/40/17 tyres. (Not that you need to on a 2wd)
But with an et of 33 I recon you will have to take a couple of millimetres from the rear arches or machine the face of the wheel. Also be advised that different tyres of the same sizing have different overall widths/shoulder heights.
Hope this helps.
Tim
I had 245/35/17 toyos on comps 17/8J Et33 on the rears and they fitted without scuffing. Very close though (1mm odd on squat) These tyres will keep the rolling radius the same as the fronts keeping the 215/40/17 tyres. (Not that you need to on a 2wd)
But with an et of 33 I recon you will have to take a couple of millimetres from the rear arches or machine the face of the wheel. Also be advised that different tyres of the same sizing have different overall widths/shoulder heights.
Hope this helps.
Tim
Cheers Tim
I have an offset of ET30 and the arches have been rolled, albeit the body kit is still the same, do you think it will be ok?
#29
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I think you would still need to take 3mm off the wheel face bringing your offset to 33 to clear but you could try it first. But please look at the overall tire width of tyres in that size as they do differ from manufacturer to manufacturer.
Go on toyo tyres uk and look at sizing dimensions for a 245/35/17 T1R you do not want anything wider than this. I will attach a picture of them on mine.
Cheers.
Tim
Go on toyo tyres uk and look at sizing dimensions for a 245/35/17 T1R you do not want anything wider than this. I will attach a picture of them on mine.
Cheers.
Tim
#30
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Thread Starter
I think you would still need to take 3mm off the wheel face bringing your offset to 33 to clear but you could try it first. But please look at the overall tire width of tyres in that size as they do differ from manufacturer to manufacturer.
Go on toyo tyres uk and look at sizing dimensions for a 245/35/17 T1R you do not want anything wider than this. I will attach a picture of them on mine.
Cheers.
Tim
Go on toyo tyres uk and look at sizing dimensions for a 245/35/17 T1R you do not want anything wider than this. I will attach a picture of them on mine.
Cheers.
Tim
Cheers Tim, appreciate your help mate
#31
Advanced PassionFord User
I have Toyo T1R's on the front and they are ok, but when put on the back with 500hp they are useless for traction compared to a track day tyre
Cheers Paul
Cheers Paul
#32
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Thread Starter
Purchased some 245 35 17's not got round to putting them on yet.
Just have to see how I go with them. I know there are some 6mm shims on the rears so that will give me a bit more if I remove them. Car is just awful traction wise on the rear at the moment with the 215's. To be honest as soon as it boosts even in 3rd gear it just looses traction which makes it difficult to relax in it to be perfectly honest.
Just have to see how I go with them. I know there are some 6mm shims on the rears so that will give me a bit more if I remove them. Car is just awful traction wise on the rear at the moment with the 215's. To be honest as soon as it boosts even in 3rd gear it just looses traction which makes it difficult to relax in it to be perfectly honest.
#33
PassionFord Post Whore!!
Purchased some 245 35 17's not got round to putting them on yet.
Just have to see how I go with them. I know there are some 6mm shims on the rears so that will give me a bit more if I remove them. Car is just awful traction wise on the rear at the moment with the 215's. To be honest as soon as it boosts even in 3rd gear it just looses traction which makes it difficult to relax in it to be perfectly honest.
Just have to see how I go with them. I know there are some 6mm shims on the rears so that will give me a bit more if I remove them. Car is just awful traction wise on the rear at the moment with the 215's. To be honest as soon as it boosts even in 3rd gear it just looses traction which makes it difficult to relax in it to be perfectly honest.
Last edited by cossynut2; 20-12-2016 at 09:28 PM.
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Mark V8 (07-01-2017)
#34
Too many posts.. I need a life!!
AS said, track day tyres are much better re grip. On my standard i5 inch cosworth wheels I have Toyo 888 215/50/15 on the rears which are actually 228mm wide. These Tyres I found to be very good when warmed up.
I now run Team Dynamics Imola wheels 7.5/17 inch with Yokohama Ad08r 215/40/17 tyres and these I cannot rate enough more grip than the 888's at colder temps and not a lot in it when warm.
Being a 7.5 rim the 215/40/17 Yokohama's (which are actually 218mm wide) fit the rim pefectly as they also have high shoulders.
8 inch rims are to wide for our cars as you have to start chopping aches etc if you want a tyres that can protect the rim.
Best.
Happy Xmas.
Tim
I now run Team Dynamics Imola wheels 7.5/17 inch with Yokohama Ad08r 215/40/17 tyres and these I cannot rate enough more grip than the 888's at colder temps and not a lot in it when warm.
Being a 7.5 rim the 215/40/17 Yokohama's (which are actually 218mm wide) fit the rim pefectly as they also have high shoulders.
8 inch rims are to wide for our cars as you have to start chopping aches etc if you want a tyres that can protect the rim.
Best.
Happy Xmas.
Tim
#35
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iTrader: (2)
Purchased some 245 35 17's not got round to putting them on yet.
Just have to see how I go with them. I know there are some 6mm shims on the rears so that will give me a bit more if I remove them. Car is just awful traction wise on the rear at the moment with the 215's. To be honest as soon as it boosts even in 3rd gear it just looses traction which makes it difficult to relax in it to be perfectly honest.
Just have to see how I go with them. I know there are some 6mm shims on the rears so that will give me a bit more if I remove them. Car is just awful traction wise on the rear at the moment with the 215's. To be honest as soon as it boosts even in 3rd gear it just looses traction which makes it difficult to relax in it to be perfectly honest.
Did you get a chance to try the tyres on ?
I was going for 235/40/17 on 8x17 Millenniums - didn't know 245/35/17 were an option.
Interested to know how you get on for clearance
#36
PassionFord Post Whore!!
Have you read the thread "Meaty Tires" by Supra92? Ridgey has very wide wheels and tyres on his Saff and they fit ,but only just! Read what he has said before you get carried away thinking it is straight forward.
#38
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I am sure someone will be able to tell you that but I think once you start going as wide as 245s there could be clearance issues. The op with his nice 3 door who asked about the wider tyres would notice a big difference in grip just by fitting track day tyres with a 215 width.They make a big difference from normal road tyres and I am sure it would sort out his lack of grip problems.
#39
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Thread Starter
Hi Mark no mate not fitted them yet.
I will let you know hopefully they'll be ok.
Its not just to improve grip I also think they will improve the overall aesthetics. 215's look like bike tyres these days.