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questions regarding Oem dc2 15" type R wheels

 
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Old 09-19-2011, 10:27 AM
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questions regarding Oem dc2 15" type R wheels

Hey all,bought some 15" oem dc2 wheels,to go with my 5th gen,the problem is i think i need to go thicker with the tyre size as my speedo does not feel right after dropping from 16" to 15".

Could it be the tyre size currently on the wheels which is 195 - 55 - 15 if these numbers mean much,im certain american sizes are similar to australian sizes

Would this ride look funny with thicker tyres,what would be a good drop to accommodate big tyres? as i will be looking to drop it once i can sort my speedo issue,thanks to those that can help
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Old 09-19-2011, 08:51 PM
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Re: questions regarding Oem dc2 15" type R wheels

What do you mean your speedo doesn't feel right?

And which dc2 wheels do you mean? The blades? A pic of them on the car would help in deciding how it'd look, but I think going with bigger tires wouldn't look good..
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Old 09-20-2011, 02:12 AM
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Re: questions regarding Oem dc2 15" type R wheels

use this to figure out how much your speedo is off

Tire size calculator

according to stock prelude tire size and your stated tire size, your speedo will be reading 2.6% too fast so if your speedo says your going 60mph your actually going 58.4mph

not a big difference but if you get a wider tire (ie. 205/55/15) or a tire with a taller side wall (ie. 195/60/15) it'll correct your speedo
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Old 09-20-2011, 10:17 AM
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Re: questions regarding Oem dc2 15" type R wheels

Quote:
Originally Posted by zpirbhai View Post
use this to figure out how much your speedo is off

Tire size calculator

according to stock prelude tire size and your stated tire size, your speedo will be reading 2.6% too fast so if your speedo says your going 60mph your actually going 58.4mph

not a big difference but if you get a wider tire (ie. 205/55/15) or a tire with a taller side wall (ie. 195/60/15) it'll correct your speedo
You had a really really useful post, unfort just that last part is incorrect. A wider tire will not correct a speedometer, but yes, going with thicker rubber will aka. larger/taller tires.
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Old 09-20-2011, 11:09 PM
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Re: questions regarding Oem dc2 15" type R wheels

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Originally Posted by Smok3y View Post
You had a really really useful post, unfort just that last part is incorrect. A wider tire will not correct a speedometer, but yes, going with thicker rubber will aka. larger/taller tires.
forgive my ignorance there - i just plugged some numbers into the calculator and it said the wider tire would correct it. 195/55 has a shorter sidewall than 205/55 because the 55 is a percentage based on the width no?

once again forgive my ignorance if im mistaken
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Old 09-21-2011, 07:43 PM
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Re: questions regarding Oem dc2 15" type R wheels

Quote:
Originally Posted by zpirbhai View Post
forgive my ignorance there - i just plugged some numbers into the calculator and it said the wider tire would correct it. 195/55 has a shorter sidewall than 205/55 because the 55 is a percentage based on the width no?

once again forgive my ignorance if im mistaken
Ehhh once again you are somewhat correct there...

Reading the numbers on a sidewall are difficult. I'll try to briefly explain ...

That 2nd # is a section height percentage. So think about it like this:

235/55/r16

If your tire was 235mm wide and it had a section width % of 55 - the height would be 129.25 (55% of 235). Tire is a Radial (the R) and rim size is 16".

Then you have 250/55/r16

So then the tire would be wider (235 ==> 250) what and you are keeping the same percentage. So now 55% of 250 = 137.5 is now the sidewall height.

I know it's stupid, the larger tires on trucks are easier (ie: 35"x12.5"x16) but you wouldn't believe trying to figure out what tire is taller/wider when you have metric like that. Some trucks are even as much as 365x60x16. It gets a little crazy reading sometimes.

But again, just because you get a wider tire, doesn't mean it'll be taller or correct the speedo. You do have it right its a percentage. But realize when you go higher in width, the % will go down.

Equivalent sized tires are usually like 210/55/r16 would be the same as 235/50/r16 - the percentage like that would be 115 and 117.5 - so close it doesn't even matter really. But it balances out. But wider doesn't equal taller, percentages will decrease if you wanted to stay the same height.
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Old 09-21-2011, 07:51 PM
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Re: questions regarding Oem dc2 15" type R wheels

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Old 09-21-2011, 08:03 PM
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Re: questions regarding Oem dc2 15" type R wheels

Quote:
Originally Posted by fadz View Post
Hey all,bought some 15" oem dc2 wheels,to go with my 5th gen,the problem is i think i need to go thicker with the tyre size as my speedo does not feel right after dropping from 16" to 15".

Could it be the tyre size currently on the wheels which is 195 - 55 - 15 if these numbers mean much,im certain american sizes are similar to australian sizes

Would this ride look funny with thicker tyres,what would be a good drop to accommodate big tyres? as i will be looking to drop it once i can sort my speedo issue,thanks to those that can help
What size are the differences in size? do you have the specs on both?
__________________

No longer own a prelude - but got 3 Hold-me-over's in the mean time
02 Dodge stratus - All stock, my DD
89 EB Edition Bronco - 6" RC Lift, 35" KO's, 302/c6 swap, Ford 9"
79 F250 Ranger Lariat - 9" Lift, 40" Ground Hawgs, 400M/NP435/NP205, D60/D70 Locked
And about enough spare parts to build 3 other trucks

"Does this truck make my penis look small?"


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Old 09-22-2011, 01:04 AM
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Re: questions regarding Oem dc2 15" type R wheels

Quote:
Originally Posted by Smok3y View Post

So then the tire would be wider (235 ==> 250) what and you are keeping the same percentage. So now 55% of 250 = 137.5 is now the sidewall height.


But again, just because you get a wider tire, doesn't mean it'll be taller or correct the speedo. You do have it right its a percentage. But realize when you go higher in width, the % will go down.

Equivalent sized tires are usually like 210/55/r16 would be the same as 235/50/r16 - the percentage like that would be 115 and 117.5 - so close it doesn't even matter really. But it balances out. But wider doesn't equal taller, percentages will decrease if you wanted to stay the same height.

okay that makes sense... learn something new everyday. thanks!
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