i30 Owners Club
MODIFYING OR DETAILING YOUR I30 => TYRES | WHEELS | BRAKES => Topic started by: GaKu on November 10, 2016, 08:31:07
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Thanks for the very detailed information.
I will be changing to Michelin crossclimates soon and was wondering on the size I should get. I have a 2011 model and tyres are 185/65R15 and want to upgrade to 195/65R15. I was wondering if this would result in an incorrect odometer reading and also affect DTE and fuel economy readouts in the long run.
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@Gaurav
Hopefully someone in Europe or the UK can answer this for you. Our cars come standard on 195/65R15 although I believe there were Some very early ones on 185s.
I'm on my tablet atm so I don't have access to the conversion chart. I'll try to get back to you tomorrow. There will be a slight difference but not a lot.
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Thanks for the very detailed information.
I will be changing to Michelin crossclimates soon and was wondering on the size I should get. I have a 2011 model and tyres are 185/65R15 and want to upgrade to 195/65R15. I was wondering if this would result in an incorrect odometer reading and also affect DTE and fuel economy readouts in the long run.
A width change wont affect your odometer or other readout, radius would but then you would decrease the profile to allow for a larger rim.
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Thanks for the very detailed information.
I will be changing to Michelin crossclimates soon and was wondering on the size I should get. I have a 2011 model and tyres are 185/65R15 and want to upgrade to 195/65R15. I was wondering if this would result in an incorrect odometer reading and also affect DTE and fuel economy readouts in the long run.
A width change wont affect your odometer or other readout, radius would but then you would decrease the profile to allow for a larger rim.
It will Craig. Height is 65% of the width. 65% of 195 is more than 65% of 185.
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Oh :head_butt:
So that would equate to a 6.5mm radius increase...is that correct :undecided: which would then mean moving down to a 60R :undecided:
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Oh :head_knock:
So that would equate to a 6.5mm radius increase...is that correct :undecided: which would then mean moving down to a 60R :undecided:
No it's diameter.
To put things in perspective, you have 8mm of tread depth (x2). Which can go down to about 1.5mm legally, so you have a certain amount of leeway to play with. In the overall scheme of things, 6.5mm isn't much. As I said, a small difference. It might not be enough to worry about.
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In this case, at 100kph on the speedo, your actual speed would be 102kph
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Just found a website that did some calculations:
185/65-15 195/65-15 Difference
Diameter inches (mm) 24.47 (621.5) 24.98 (634.5) 0.51 (13) 2.1%
Width inches (mm) 7.28 (185) 7.68 (195) 0.39 (10) 5.4%
Circum. inches (mm) 76.87 (1952.5) 78.48 (1993.34) 1.61 (40.84) 2.1%
Sidewall Height inches (mm) 4.73 (120.25) 4.99 (126.75) 0.26 (6.5) 5.4%
Revolutions per mile (km) 824.25 (512.16) 807.36 (501.67) -16.89 (-10.49) -2%
Seems like this would mean that I have to adjust my readouts by 2%
Agree?
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I meant diameter :head_butt:
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That's correct.
Unfortunately, while I've been answering your posts, someone has split the topic off.
A bit frustrating when the discussion is active.
Ill try to move over the other relevant posts.
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They're all in place now. You might need to go back up the page to follow the thread.
Shambles is on the ball tonight. :crazy1:
As you worked out yourself, 100 on the speedo is 102 actual.
Not really worth worrying about.
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Well, here the speedo actually shows about 10% more than actual (when compared to GPS and also roadside speed meters). My friends with other cars also say the same. I am thinking that may be due to some law in order to accommodate for larger tyres (EU laws are weird). Thats why I have never been able to get reliable readouts for fuel economy but thought the odo would be right...but maybe not after all.
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Unfortunately, while I've been answering your posts, someone has split the topic off.
A bit frustrating when the discussion is active.
Sorry 'bout that.
's request would have got lost/buried inside a stickied "for info" post. Yeah, maybe I should have held off :P
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Yeah, maybe I should have held off :P
Don't go all liberal do-gooder welfare softie on us, Donald Steve. Swing that club like a real boss. :lol:
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Unfortunately, while I've been answering your posts, someone has split the topic off.
A bit frustrating when the discussion is active.
Sorry 'bout that.
's request would have got lost/buried inside a stickied "for info" post. Yeah, maybe I should have held off :P
:goodjob:
No probs. All got sorted in the end.
Just confused me 'coz I often just useethe back option on the tablet and I was going back and being told the posts weren't available. :head_knock:
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I run 185/65-15 winter and 195/65-15 summer.
The 195 makes the speedo read more accurate. Compared to GPS:
Tyre Speedo GPS
185/65: 90 84/85
195/65 90 86/87