F3 Rear Tires

[_..stiffler..]

Answer is as above from JC. To cut a lot of threads short, the Yoko S-Drive 205/55/15 works out almost exactly the same size as the OEM Kenda 225/50/15 when fitted.

In height yes. But almost an inch narrower. May not be much but when looking at it. Looks like alot. 205 IMO would look funny and perform a bit different.

Anyone have any pics of them side by side on the vehicle.

Stiff

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[jcthorne]

In height yes. But almost an inch narrower. May not be much but when looking at it. Looks like alot. 205 IMO would look funny and perform a bit different.

Anyone have any pics of them side by side on the vehicle.

Stiff

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No in width they are nearly the same too. The NOMINAL size numbers are different. The ACTUAL dimensions are only 1/8 inch narrower tread width on the Yoko and contact patch is actually wider.

 

[RedStar]

Just ordered the Yoko S-Drive! :yes:

 

[pauly1]

The first number is the tire width in millimeters. The difference between the tires is 20 mm or just over 3/4 inch. The second number is the sidewall height as a percentage of the width, that is the first number. The overall height of the tire is the last number in inches, the bead diameter, plus two times the second number. In doing the calculations you have to remember to convert the dimensions into common units.

225 - 205 = 20 mm = 0.787" nominal difference in width

(Width × height ratio × 2 / 25.4) + bead diameter = nominal tire height in inches
(205 × 55% × 2 / 25.4) + 15 = 23.88
(225 × 50% × 2 / 25.4) + 15 = 23.86

Although they are close to the same height, somewhere the nominal tread width is different by over 3/4 inch.

Wayne

 

[Peter Aawen]

^^ That's all fine when you are talking nominal tire sizes, but some tire manufacturers base their tire labelling on the bare tire carcass, then they overlay the tread & sidewall protective layers onto that carcass, resulting in a measurably 'larger' tire; while others base their tire labelling on the nearest nominal size once all that extra rubber has been added!! :shocked:

So to compare exact tire dimensions, you really need to check the physical measurements/specs of the particular tires themselves - one brand of tire that might be labelled 215/55x15 because that's what the naked carcass measured can actually be very close in size or possibly even slightly larger than another brand of tire labelled 225/50x15 simply because that second manufacturer based their labelling on the fully wrapped & finished tire!! :yikes:

You'd think that using a standard labelling system would mean that different tires labelled with the same nominal size would be close in size, but until there are mandated & enforced measuring conventions in place, some manufacturers will try to use the potential differences between what it's measured in this instance/by this method vs what labelled size will work to their advantage! Sorry, but that's just how the Mercedes' bends! :thumbup:

 

[PW2013STL]

In height yes. But almost an inch narrower. May not be much but when looking at it. Looks like alot. 205 IMO would look funny and perform a bit different.

Anyone have any pics of them side by side on the vehicle.

Stiff

Sent on Note 5 in Taptalk

I have been running a 205 size now for over 8,000 miles and I can tell you that it handles and rides great and you would be hard pressed to see that it's 20mm narrower.
I am running a Mitchlin Premier A/S.

 

[_..stiffler..]

I have been running a 205 size now for over 8,000 miles and I can tell you that it handles and rides great and you would be hard pressed to see that it's 20mm narrower.
I am running a Mitchlin Premier A/S.

Ya I'm not questioning the ride or anything.

Just looks for me. I remember putting wider tires on cars and the look really stands out. Even if it is 20mm

Not a big deal tho.

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[r1100rider]

This will be my next tire

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i ran one of those and it wore out as fast as the oem

 

[jcthorne]

The Yoko S-Drive is NOT 20mm narrower. Its about 3mm narrower. So small a difference you cannot tell without taking a ruler to it.

 

[monkeyboymorton]

Yeah, you have to not take tyre size calculations from websites and expect real tyres to measure the same in a set size.

As stated above, they don't. You have to measure the actual tyre in quesiton, which is why forums like this are invaluable.

 

[_..stiffler..]

like said above all tire sizes even if they claim the same size can be different. I know this. can anyone take a close picture from the rear of OEM tire and the rear of the yoko S drive with a tape measure and confirm they look the same.

I have never tried the toyo proxes on anything, its just the oem size and I can get it in canada. R1100 when did you try this tire, from what I have seen you cannot get it in the USA.

I cant see it wearing out in 10,000km but who knows...

 

[_..stiffler..]

S drive is cheaper for me here in cnd. So I'll buy one and try it.

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[GDA]

do you guys try toyo r888 225/50r15?

Its a R spec tire.


Will that be great for our f3?

 

[MrBones]

Here is a comparsion. 225 to 205

[TH="bgcolor: #0075AC, align: left"]205/50-15[/TH]
[TH="bgcolor: #0075AC, align: left"]Difference[/TH]

[TH="align: right"]Diameter inches (mm)[/TH]
[TD="bgcolor: #FFFFFF"]23.86 (606)[/TD]
[TD="bgcolor: #FFFFFF"]23.07 (586)[/TD]
[TD="bgcolor: #FFFFFF"]-0.79 (-20) -3.3% [/TD]

[TH="align: right"]Width inches (mm)[/TH]
[TD="bgcolor: #FFFFFF"]8.86 (225)[/TD]
[TD="bgcolor: #FFFFFF"]8.07 (205)[/TD]
[TD="bgcolor: #FFFFFF"]-0.79 (-20) -8.9% [/TD]

[TH="align: right"]Circum. inches (mm)[/TH]
[TD="bgcolor: #FFFFFF"]74.95 (1903.81)[/TD]
[TD="bgcolor: #FFFFFF"]72.48 (1840.97)[/TD]
[TD="bgcolor: #FFFFFF"]-2.47 (-62.83) -3.3% [/TD]

[TH="align: right"]Sidewall Height inches (mm)[/TH]
[TD="bgcolor: #FFFFFF"]4.43 (112.5)[/TD]
[TD="bgcolor: #FFFFFF"]4.04 (102.5)[/TD]
[TD="bgcolor: #FFFFFF"]-0.39 (-10) -8.9% [/TD]

[TH="align: right"]Revolutions per mile (km)[/TH]
[TD="bgcolor: #FFFFFF"]845.33 (525.26)[/TD]
[TD="bgcolor: #FFFFFF"]874.18 (543.19)[/TD]
[TD="bgcolor: #FFFFFF"]28.85 (17.93) 3.4% [/TD]

Forum embed code: ​

 

[jcthorne]

[TH="bgcolor: #0075AC, align: left"]205/50-15[/TH]
[TH="bgcolor: #0075AC, align: left"]Difference[/TH]

[TH="align: right"]Diameter inches (mm)[/TH]
[TD="bgcolor: #FFFFFF"]23.86 (606)[/TD]
[TD="bgcolor: #FFFFFF"]23.07 (586)[/TD]
[TD="bgcolor: #FFFFFF"]-0.79 (-20) -3.3% [/TD]

[TH="align: right"]Width inches (mm)[/TH]
[TD="bgcolor: #FFFFFF"]8.86 (225)[/TD]
[TD="bgcolor: #FFFFFF"]8.07 (205)[/TD]
[TD="bgcolor: #FFFFFF"]-0.79 (-20) -8.9% [/TD]

[TH="align: right"]Circum. inches (mm)[/TH]
[TD="bgcolor: #FFFFFF"]74.95 (1903.81)[/TD]
[TD="bgcolor: #FFFFFF"]72.48 (1840.97)[/TD]
[TD="bgcolor: #FFFFFF"]-2.47 (-62.83) -3.3% [/TD]

[TH="align: right"]Sidewall Height inches (mm)[/TH]
[TD="bgcolor: #FFFFFF"]4.43 (112.5)[/TD]
[TD="bgcolor: #FFFFFF"]4.04 (102.5)[/TD]
[TD="bgcolor: #FFFFFF"]-0.39 (-10) -8.9% [/TD]

[TH="align: right"]Revolutions per mile (km)[/TH]
[TD="bgcolor: #FFFFFF"]845.33 (525.26)[/TD]
[TD="bgcolor: #FFFFFF"]874.18 (543.19)[/TD]
[TD="bgcolor: #FFFFFF"]28.85 (17.93) 3.4% [/TD]

Forum embed code: ​

[/QUOTE

except those dimensions are dead wrong for the two tires in question.

 

[_..stiffler..]

These are the tire sizes. From the exact tires. The s drive is about half an inch narrower. So not alot. But probably still noticeable by looking at it. For me Anyway.

Not a huge deal.

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[jcthorne]

These are the tire sizes. From the exact tires. The s drive is about half an inch narrower. So not alot. But probably still noticeable by looking at it. For me Anyway.

Not a huge deal.

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Sorry, I was comparing it to the Kenda. The Toyo is not available in the US.

 

[_..stiffler..]

Sorry, I was comparing it to the Kenda. The Toyo is not available in the US.

Ahh. Well anything is better then the kenda. Even the spare donut from my civic. Lmao



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[bigwhammy]

7 inch rear

These are the tire sizes. From the exact tires. The s drive is about half an inch narrower. So not alot. But probably still noticeable by looking at it. For me Anyway.

Not a huge deal.

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hi, the above specs are measured on a 6.5 inch rim
static width (overall width)will be different on an Spyder with 7 inch rim.
tread width on the road will also be different
but in the big scheme of things, if it does not rub on anything 1/2 difference in tread width is not worth thinking about
50 to 55 profile will add about 6mm to inflated OD -static radius - dynamic radius and tires tread depth new can vary up to 5 mm.
New Depth of Proxes - proxes 4 = 7.7 mm, Proxes R1R = 6.5 mm , T1R = 8.4 this is why the T1R is rated better for tyre wear and the R1R wears out pretty quickly.
R1R are the drifters choice here in Australia having the best grip in the dry all the other qualities eg in wet, ride, noise, fuel eco my are the poorest of the 3. Car drifters do not care about anything except dry grip.
, T1R comes in 225 /50R15. 91V. IMHO the best option for a Spyder

 

[Wayne Gary]

Yoko S Drive Tire

S drive is cheaper for me here in cnd. So I'll buy one and try it.

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The Service Mgr. I bought my F3 from said he didn't think the Yoko S would work as he remarked they had problems with other makes of tires other than Kenda and he offered free install if I put a Kenda. Went here and found the truth, then went to another dealer and had them install the Yoko S Drive 205/55R15 I bought on Amazon for less than U$100 and also new bearings seals/dampers/etc. which added up but feel a big difference in the ride now, a lot better. The Yoko S is also a stronger tire with 2 ply sidewalls and a steel belt/etc. more than the Kenda. More confident on the tire and a better ride, my life is riding on this tire so I'm satisfied.