225/50/16 fit ok? 16x8

Ilogik · January 27, 2009, 20:30

I really want good year eagle f1's, currently I am running 16x7 or 7.5 front and 16x8 I think, when i measure looks like 16x8 and 16x9 rear.

Currently on 205/45/16 front, and the rears are 215/45/16, they seem a little stretched on the rear, and don't fill the arches are well as the fronts do looks wise.

Would a 50 profile work?

Chris_h · January 27, 2009, 20:55

Quote from: "Ilogik"I really want good year eagle f1's, currently I am running 16x7 or 7.5 front and 16x8 I think, when i measure looks like 16x8 and 16x9 rear.

Currently on 205/45/16 front, and the rears are 215/45/16, they seem a little stretched on the rear, and don't fill the arches are well as the fronts do looks wise.

Would a 50 profile work?

50 on a 225 with stretch the circumference quite a bit - poss too much...

Anyone done the maths?

markiii · January 27, 2009, 20:59

don't worry about teh profile

the issue is will teh width fit the rim

check the toyo website they usually list rim width V tyre width that will give you a guide but from experience F1s are a little narrower than some others for teh same width

Ilogik · January 27, 2009, 21:04

The higher I get the bigger the side wall will be right?

Chris_h · January 27, 2009, 21:08

Quote from: "Ilogik"The higher I get the bigger the side wall will be right?

yes, so 225/50 will have a 112.5mm side wall
and a 215/45 = 96.75mm

Quite a big diff, wont that throw out speedo etc?

markiii · January 27, 2009, 21:09

correct , so teh wider tehtyre the lower teh profile you want to keep the rolling radius teh same

have a play

m http://www.miata.net/garage/tirecalc.html m

Ilogik · January 27, 2009, 21:14

Quote from: "markiii"correct , so the wider tehtyre the lower the profile you want to keep the rolling radius the same

have a play

m http://www.miata.net/garage/tirecalc.html m

So does the width of the wheel make much difference. Because on a 16x7 there will be less stetch than a 16x8. That wheel calculator does not take width into account?

VVT-i · January 27, 2009, 21:19

The recommended J size for 225/50x16 is between 6 and 7.5J, however they will fit the 8J rim without any problems.

I would be more concerned with if they actually fit the car properly, the standard size of the facelift model is 215/45x16 (rear obviously... I assume you are talking about rear tyres?) this is a difference in height of 15.75mm, the 225/50's being taller.

Obviously depending on the offset of the wheels the width won't be a problem, I currently have 215/45x17 on the rear of mine and they are within 0.98% of the height of the 225/50x16... more or less the same height, My car has been lowered 30mm (approx) and I have no rubbing at all. What would bother me about fitting 225/50x16 is the appearance, I personaly think they will look oversized for the car and wheels.. too much sidewall and not enough wheel if you know what I mean... moon buggy springs to mind. This could have quite a dramatic effect on the handling of your car as there will be more sidewall to flex resulting in less tread area being in contact with the road.

To sum up...

Will they fit.... yes,probably*

My advice is don't fit them due to looks and possible handling issues.

*They are about as close to the size I have in 17" as you will get in 16" and I have no issues with rubbing.

Edit:... here is a simple way to work out the difference in height of tyres with the same diameter/rim size.

225/50x16 = 225x50% = height of sidewall.

markiii · January 27, 2009, 21:20

best bet is use teh toyo website as a guide to what width tyre is safe to fit on the width wheel you have

once you know that pick teh best size that gives teh right rolling radius based on teh miatanet link

and I agree 225/50 will handle like shit due to teh balloon size sidewall

VVT-i · January 27, 2009, 21:27

m http://www.carbibles.com/tyre_bible_pg2.html m

Good calculators are here.

Good example quoted on site..

Quotehe actual dimensions of a tyre depend on the rim on which it is mounted. The biggest variable is the tyre's section width; a change of about 0.2" for every 0.5" change in rim width.

The ratio between the section width and the rim width is pretty important. If the rim width is too narrow, you pinch the tyre in and cause it to balloon more in cross-section. If the rim width is too wide, you run the risk of the tyre ripping away at high speed.

For 50-series tyres and above, the rim width is 70% of the tyre's section width, rounded off to the nearest 0.5.

For example, a 255/50R16 tyre, has a design section width of 10.04" (255mm = 10.04 inches). 70% of 10.04" is 7.028", which rounded to the nearest half inch, is 7". Ideally then, a 255/50R16 tyres should be mounted on a 7x16 rim.

For 45-series tyres and below, the rim width is 85% of the tyre's section width, rounded off to the nearest 0.5.

For example, a 255/45R17 tyre, still has a design section width of 10.04" (255mm = 10.04 inches). But 85% of 10.04" is 8.534", which rounded to the nearest half inch, is 8.5". Ideally then, a 255/45R17 tyre should be mounted on an 8½x17 rim.

Ilogik · January 27, 2009, 21:34

its telling me a 225/40 would work on a 17x9, and i need a 215/45 for a 8.5 inch rim. I think I will have to take the rear wheel off and see if size and offset is inside, as the tyre looks seriously stetched.

VVT-i · January 27, 2009, 21:57

Post a picture of it so I can see it.... the extent of the stretch that is.

VVT-i · January 27, 2009, 21:58

I have 215/45x17 on a 7J rim. 225/40x17 don't exist s:(

s:(

Steven Velocity · January 28, 2009, 02:14

On my 2" TEIN SS lowered Roadster I ran Advan A048 on My stock pre-face lift rims in the following sizes:

REAR 225/50/15
FRONT 205/50/15

There were no issues at all (not even under high G cornering) of rubbing and the tyres looked decently flush & not too tall. The handling was outstanding; initial turn in is just a tiny, tiny bit slower, but overall grip and cornering at all speeds was improved nciely. An added bonus is that in a straight line the car feels much more planted (I did my 160+ mph run on this setup) and does not trammel nearly as much as 195s or even 205s do on our car. I plan on running a Toyo R888 on 225/25/16 (stock face lift rim) when my wallet permits. I highly recommend the REAR 225/50/15 and FRONT 205/50/15 combo as it is very effective.

And did I mention the Techno Pro Spirits MRS ran these same tyre sizes...

SV

markiii · January 28, 2009, 08:49

A048s have hard sidewalls

F1s don;t

Ilogik · January 28, 2009, 13:39

this is the stetch im talking about

VVT-i · January 28, 2009, 19:16

It certainly looks like it could do with having a slightly wider tyre on there.. 225's would look more comfortable on the rim... but I wouldn't go with the 50 series as this will make the sidewall of the tyre bigger leading to the issues I mentioned above. To keep the overall height of the wheel and tyre as it is now (IE keep the same gap between tyre and wheel arch) you would need....

215/45x16 = 96.75mm (in height.) your current size.

225/40x16 = 90mm (a little shorter)

225/45x16 = 101.25mm (a little taller)

One size is roughly 6mm lower whilst the other size is roughly 6mm higher.... 40 series will open the gap between the tyre and arch and 45 series will close the gap between tyre and arch.. 50 series would look like a monster truck lol.

philster_d · January 28, 2009, 19:35

Quote from: "Ilogik"

hahaha Man love rules !

Ilogik · January 28, 2009, 21:50

think I will go 225/45/16

Ilogik · January 28, 2009, 22:44

Cheapest I have found so far £63 camskill.

Ilogik · February 3, 2009, 12:58

Just had tyres fitted, found out my rear wheels are 16x8 et 35 so happy I finally found out what they were, Had 225/40/16 fitted, but am kinda wishing I had the 225/45/16 fitted for some extra meat up back. Overall they look same size as the 215/45 but don't look stretched now. Not tested them due tot he snow but will let you knowmy opinion.

markiii · February 3, 2009, 13:04

40 or 45 won;t affect anything other than sidewall height

so it depends on what you mean by"meat"

Ilogik · February 3, 2009, 13:12

Quote from: "markiii"40 or 45 won;t affect anything other than sidewall height

so it depends on what you mean by"meat"

The tyre wall, jut making it look bigger at the back a big, for aesthetic value to fill the rear arch a bit more.

Liz · February 3, 2009, 13:43

Surely safety is more important than aesthetics?

Ilogik · February 3, 2009, 14:43

bit of both is good, On my old turbo i ran much higher than stock and it worked wonders plus looked the shit lol. I think im angry because i want to lower it but i kno i cant lol