Tyre size pic for diff ratio
Thread Starter
Instructor
Joined: Apr 2012
Posts: 243
Likes: 3
From: Sydney Australia
Tyre size pic for diff ratio
I am slowly moving along in my frame off.
I have bought a vb & p suspension kit and new offset trailing arms from vansteel so far.
The next thing i am saving for now, is the diff. So this might be one of those asked before questions.
I dont want to go the old school 15 inch. As i want a performance tyre on it.
So i was looking at 17 or 18's. My current modern car has 19x235x40 ( pretty sure). But i dont want 19's. So i know i will feel it, bumps that is
Can some people here post a pic of there size/tyre combo so i can see how they fit on the car. Rim style not worry about, just the size.
All this because i am trying to figure out a diff ratio. I know 1st you want around 10 on the stats.
I am using that great spread sheet with all the calculations on it, that i got from these forums.
I am leaning towards 3.7 or 3.9 ATM, but that is using the default type size on the spreadsheet.
i am looking at a ls2 engine and a 200r4 manual auto ( none of these i have bought yet).
Pics aways .
I have bought a vb & p suspension kit and new offset trailing arms from vansteel so far.
The next thing i am saving for now, is the diff. So this might be one of those asked before questions.
I dont want to go the old school 15 inch. As i want a performance tyre on it.
So i was looking at 17 or 18's. My current modern car has 19x235x40 ( pretty sure). But i dont want 19's. So i know i will feel it, bumps that is
Can some people here post a pic of there size/tyre combo so i can see how they fit on the car. Rim style not worry about, just the size.
All this because i am trying to figure out a diff ratio. I know 1st you want around 10 on the stats.
I am using that great spread sheet with all the calculations on it, that i got from these forums.
I am leaning towards 3.7 or 3.9 ATM, but that is using the default type size on the spreadsheet.
i am looking at a ls2 engine and a 200r4 manual auto ( none of these i have bought yet).
Pics aways .
Thread Starter
Instructor
Joined: Apr 2012
Posts: 243
Likes: 3
From: Sydney Australia
i know it sound wierd. But.
You know how some type/rim combos dont look right. I am trying to look at the sizes and see how it fits in the car. As in what looks crap or not.
Then once i know a size, say 18x245x40 ( the last nuber the most important i asume), i can put that combo in a calculator and pick a right diff ratio.
Like i dont want to buy, say a 3.7 then pick a tyre/rim size and say "should of got the other one).
I already own a car with a ls2 engine in it, so i know how it behaves at whatever rpm.
The spread sheet i got off some member here ( sorry i forgot who) , is a great calculator, type anything it , gearbox, typre size , then it shows speeds in 5mph and what the rpm will be.
You know how some type/rim combos dont look right. I am trying to look at the sizes and see how it fits in the car. As in what looks crap or not.
Then once i know a size, say 18x245x40 ( the last nuber the most important i asume), i can put that combo in a calculator and pick a right diff ratio.
Like i dont want to buy, say a 3.7 then pick a tyre/rim size and say "should of got the other one).
I already own a car with a ls2 engine in it, so i know how it behaves at whatever rpm.
The spread sheet i got off some member here ( sorry i forgot who) , is a great calculator, type anything it , gearbox, typre size , then it shows speeds in 5mph and what the rpm will be.
Last edited by Dirk76; Jun 23, 2013 at 03:31 AM.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
i know it sound wierd. But.
You know how some type/rim combos dont look right. I am trying to look at the sizes and see how it fits in the car. As in what looks crap or not.
Then once i know a size, say 18x245x40 ( the last nuber the most important i asume), i can put that combo in a calculator and pick a right diff ratio.
Like i dont want to buy, say a 3.7 then pick a tyre/rim size and say "should of got the other one).
I already own a car with a ls2 engine in it, so i know how it behaves at whatever rpm.
The spread sheet i got off some member here ( sorry i forgot who) , is a great calculator, type anything it , gearbox, typre size , then it shows speeds in 5mph and what the rpm will be.
You know how some type/rim combos dont look right. I am trying to look at the sizes and see how it fits in the car. As in what looks crap or not.
Then once i know a size, say 18x245x40 ( the last nuber the most important i asume), i can put that combo in a calculator and pick a right diff ratio.
Like i dont want to buy, say a 3.7 then pick a tyre/rim size and say "should of got the other one).
I already own a car with a ls2 engine in it, so i know how it behaves at whatever rpm.
The spread sheet i got off some member here ( sorry i forgot who) , is a great calculator, type anything it , gearbox, typre size , then it shows speeds in 5mph and what the rpm will be.
Scott
Race Director
Joined: Jan 2007
Posts: 14,948
Likes: 3,351
From: NYC NY
The trick to getting bigger wheels to look "right" is to keep the tire diameter as close to stock tire diameter as possible. That's going to be about 27 inches. Plus, you don't have to worry about speedo gears, and diff gears, it's a win-win. 17"x8" wheels with 255/50/17 tires is a popular choice. Google a tire size calculator online to see tire diameters for different size tires.
Scott
Scott
What Scott is saying. If you stay with a 27" tall tire no matter what diameter or width you choose you should have no problem.What are you looking to do? Do you want the same size front and rear?
Do you want 17s or 18s. If you go with 17s about the only size you'll find that's 27" tall is the 255/50-17. If you go with 18s a 255/45-18 and a 285/40-18 are both about 27" tall.
If you do a search using "17s" and "18s" you will find several threads with lots of pictures.
I hope this helps.
Drifting
Joined: May 2005
Posts: 1,968
Likes: 44
From: East TN
Here's a picture of mine with 17"x9.5" rims 275/40 ZR17 tires front and rear, with an overall tire diameter of 25.55". My ground to center wheel lip height is 26.5" front and 27.5" rear. I also have a VBP suspension and offset trailing arms.
Melting Slicks
Joined: Apr 2001
Posts: 2,030
Likes: 363
From: Lubbock Texas
Here are my 17's (235/55-17). 255/50-17s will also fit and are the same height. But, they are a bit wider and may require some minor trimming inside the front fenders. Glad you liked the spreadsheet.
DC
DC
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Thread Starter
Instructor
Joined: Apr 2012
Posts: 243
Likes: 3
From: Sydney Australia
sorry dc3 i forgot your nick. It make calculations so easy.
Was looking at maybe 18's back and 17's front.
255/50-17
285/40-18
if i pick the same i think i would go 255-50-17, but was trying to get a 275 or 285 back.
I should of thought of the 27inches to start with... Speadsheet time.
Was looking at maybe 18's back and 17's front.
255/50-17
285/40-18
if i pick the same i think i would go 255-50-17, but was trying to get a 275 or 285 back.
I should of thought of the 27inches to start with... Speadsheet time.
Last edited by Dirk76; Jun 24, 2013 at 12:03 AM.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
sorry dc3 i forgot your nick. It make calculations so easy.
Was looking at maybe 18's back and 17's front.
255/50-17
285/40-18
if i pick the same i think i would go 255-50-17, but was trying to get a 275 or 285 back.
I should of thought of the 27inches to start with... Speadsheet time.
Was looking at maybe 18's back and 17's front.
255/50-17
285/40-18
if i pick the same i think i would go 255-50-17, but was trying to get a 275 or 285 back.
I should of thought of the 27inches to start with... Speadsheet time.
Scott
Race Director
Joined: Jan 2007
Posts: 14,948
Likes: 3,351
From: NYC NY
Something to think about. That 17 and 18 combination IMCO will not look right. While the overall tire height will be the same but the front tire will have more sidewall than the rear tire. It may not bother you but looking at the car from the side it just doesn't look right. If you want to go 17s and 18s (and that's your choise) you would need a 255/45-17 in the front to match the 285/40-18 in the rear. Again your car and you need to pick what will make you happy not me or the rest of us for that matter.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Scott
Melting Slicks
Joined: Apr 2001
Posts: 2,030
Likes: 363
From: Lubbock Texas