Stupid tyre size question - VW Forum - VZi, Europe's largest VW, community and sales
 
Machine 7, high quality air-cooled  restoration and performance parts

     
 

Go Back   VW Forum - VZi, Europe's largest VW, community and sales > Tech Forums > Wheels & Tyres Forum

Wheels & Tyres Forum Please discuss wheels or tyres (for all vehicles) in here.

Machine 7, high quality air-cooled  restoration and performance parts
Reply Post New Thread
 
Thread Tools Rate Thread Display Modes
Old 09-06-2016, 07:18 AM   #1
FunkyDad
Help! I'm trapped in here
 
FunkyDad's Avatar

Trading feedback: (0)
 
Join Date: Jul 2004
Location: South Wales
Posts: 10,903
Default Stupid tyre size question

Sorry to sound a bit thick here.
What is the tyre hight out of these numbers please and what do the others mean.
And is it all in inches?

215/60/R17

Cheers all.
__________________
Quote:
Originally Posted by kiwigirl View Post
Are you holding monkeys in clothes?
FunkyDad is offline   Reply With Quote
Old 09-06-2016, 07:27 AM   #2
StuF
Seasoned Chat Slut
 
StuF's Avatar

Trading feedback: (2)
 
Join Date: Sep 2011
Location: Lincoln
Posts: 2,000
Default



So 215/60/R/17

is 215mm wide, 60 profile/sidewall, radial construction and 17 inches
__________________
Where Napoleons armies marched with horse and musket and Hitlers Reich crumbled in blood and rubble, the warriors of Armageddon do battle against the landscape of hell now indeed thrive the ARMOURERS

Weekend - 1970 Type 2 EJ25 Powered 5 Speed EarlyBay on BTR's
Fun - Silver Porsche 996 Turbo
Inclement - Silver Porsche Cayenne Turbo S
StuF is offline   Reply With Quote
Old 09-06-2016, 07:33 AM   #3
FunkyDad
Help! I'm trapped in here
 
FunkyDad's Avatar

Trading feedback: (0)
 
Join Date: Jul 2004
Location: South Wales
Posts: 10,903
Default

Quote:
Originally Posted by StuF View Post


So 215/60/R/17

is 215mm wide, 60 profile/sidewall, radial construction and 17 inches
So the 60/65 (do you knock off the 5?) is from the edge of the wheel to the hight of the tread?
__________________
Quote:
Originally Posted by kiwigirl View Post
Are you holding monkeys in clothes?
FunkyDad is offline   Reply With Quote
 
Old 09-06-2016, 07:50 AM   #4
roly
Seasoned Chat Slut
 
roly's Avatar

Trading feedback: (0)
 
Join Date: Jun 2002
Posts: 2,086
Default

Quote:
Originally Posted by FunkyDad View Post
So the 60/65 (do you knock off the 5?) is from the edge of the wheel to the hight of the tread?
No, I don't know why they put picture of 65 profile but then was writing 60.

This measurement is a percentage of the width, so the sidewall height of the pictured tyre is 65% of 205mm.
roly is offline   Reply With Quote
Old 09-06-2016, 08:31 AM   #5
FunkyDad
Help! I'm trapped in here
 
FunkyDad's Avatar

Trading feedback: (0)
 
Join Date: Jul 2004
Location: South Wales
Posts: 10,903
Default

Ok cheers.
The car we are buying comes with 255/40/R20 but the model down the range comes with 235/55/R18 and I am wondering if we could change the wheels and tyres to this, or would there be something else in the car which would be set up for the lower profile apart from the suspension.
__________________
Quote:
Originally Posted by kiwigirl View Post
Are you holding monkeys in clothes?
FunkyDad is offline   Reply With Quote
Old 09-06-2016, 09:39 AM   #6
schmeil1
Seasoned Chat Slut
 
schmeil1's Avatar

VZi Member Sponsor

Trading feedback: (1)
 
Join Date: Oct 2004
Location: Haughley, Suffolk
Posts: 2,377
Default

What's your thinking Steve?

More economy? Lower cost of replacement tyres??

This is a useful online Tyre comparison tool:

Tyre Size Calculator

As you can see very little difference between 255/40/20 and 235/55/18...



__________________


Still not driving my Buggy (though now taxed), but my 1302 is now fixed and taxed and I've now taken delivery done over 70,000 miles in my 2016 Tiguan
schmeil1 is offline   Reply With Quote
Old 09-06-2016, 09:57 AM   #7
FunkyDad
Help! I'm trapped in here
 
FunkyDad's Avatar

Trading feedback: (0)
 
Join Date: Jul 2004
Location: South Wales
Posts: 10,903
Default

Kerbing "She" as well as price.
On our QQ we havent had one single problem.
I have found this excellent site which gives you loads of info on tyres. there is also a calculator near the bottom of this page to tell you the difference in speedo readings.
I would like to go from the
255/40/R20 to 235/55/R18
Enter the figures into it to show you the difference.
If the speedo was showing 70 I would in fact be doing 70.36
http://www.carbibles.com/tyre_bible_pg4.html
__________________
Quote:
Originally Posted by kiwigirl View Post
Are you holding monkeys in clothes?
FunkyDad is offline   Reply With Quote
Old 09-06-2016, 11:17 AM   #8
schmeil1
Seasoned Chat Slut
 
schmeil1's Avatar

VZi Member Sponsor

Trading feedback: (1)
 
Join Date: Oct 2004
Location: Haughley, Suffolk
Posts: 2,377
Default

Quote:
Originally Posted by FunkyDad View Post
Kerbing "She" as well as price.
On our QQ we havent had one single problem.
I have found this excellent site which gives you loads of info on tyres. there is also a calculator near the bottom of this page to tell you the difference in speedo readings.
I would like to go from the
255/40/R20 to 235/55/R18
Enter the figures into it to show you the difference.
If the speedo was showing 70 I would in fact be doing 70.36
http://www.carbibles.com/tyre_bible_pg4.html
I've used the carbible site in the past I'm at work at the moment though and couldn't remember what it was called

...and I must admit that I kerbed a front wheel on the Golf only the other day (not concentrating, don't ask ) but no longer my problem as it will be going back in only five weeks time!!

P.S. Watch the Speed Camera's with all that extra (0.36) speed
__________________


Still not driving my Buggy (though now taxed), but my 1302 is now fixed and taxed and I've now taken delivery done over 70,000 miles in my 2016 Tiguan
schmeil1 is offline   Reply With Quote
Old 09-06-2016, 12:38 PM   #9
Beetlebank
I'm not an addict... honest!
 
Beetlebank's Avatar

Trading feedback: (1)
 
Join Date: Sep 2006
Location: Bideford, Devon
Posts: 4,010
Default

Quote:
Originally Posted by FunkyDad View Post
So the 60/65 (do you knock off the 5?) is from the edge of the wheel to the hight of the tread?
No. The '60' in this case is the height of the tyre as a percentage of its width, so with a 215mm wide/60% profile R17" diameter tyre, the sidewall height is 60% of 215mm, or 129mm. R17 means 17 inches diameter rim fitting.

Note that the 'rolling radius' (the radius of the tyre under load) will be less than the theoretical dimension due to carcass deflection and also varies with tyre pressure. The sidewall compression (and therefore rolling radius reduction) becomes less, relatively, as the profile becomes smaller.

Cheers, Carl.
__________________
One cannot reason someone out of a position they did not reason themselves into.
Beetlebank is offline   Reply With Quote
Old 09-06-2016, 01:54 PM   #10
FunkyDad
Help! I'm trapped in here
 
FunkyDad's Avatar

Trading feedback: (0)
 
Join Date: Jul 2004
Location: South Wales
Posts: 10,903
Default

Quote:
Originally Posted by Beetlebank View Post
No. The '60' in this case is the height of the tyre as a percentage of its width, so with a 215mm wide/60% profile R17" diameter tyre, the sidewall height is 60% of 215mm, or 129mm. R17 means 17 inches diameter rim fitting.

Note that the 'rolling radius' (the radius of the tyre under load) will be less than the theoretical dimension due to carcass deflection and also varies with tyre pressure. The sidewall compression (and therefore rolling radius reduction) becomes less, relatively, as the profile becomes smaller.

Cheers, Carl.
Without going back into the showroom and having another look, what I am basically trying to find out is how much taller in inches is the sidewall of the tyre, actual tyre showing from the wheel to the tread.
The tyres which come with the car are 40 but the lesser model comes with 55, so Im looking for more ground clearance.
so how much taller are the two tyres compared to each other.. Just as sake of argument, one is 12" high the other 15"

I think its easier to just pop back to the dealer and have a butchers
__________________
Quote:
Originally Posted by kiwigirl View Post
Are you holding monkeys in clothes?

Last edited by FunkyDad; 09-06-2016 at 01:57 PM..
FunkyDad is offline   Reply With Quote
Reply Post New Thread

Bookmarks

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 10:04 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Disclaimer: For recreational purposes only, some assembly required. Any resemblance to real persons,
living or dead is purely intentional and the site admins are not responsible for direct, indirect,
incidental or consequential ridicule resulting from any defect or failure to perform. No animals
were harmed in the creation of this forum. Colours may fade over time. No other warranty expressed or implied.

volkszone.com

SupportingSupporting Brad's Cancer Foundation

 










 
© Volkszone • Terms and Conditions of use



volkszone.com is an independent Volkswagen enthusiast website owned and operated by VerticalScope Inc. Content on volkszone.com is generated by its users. volkszone.com is not in any way affiliated with Volkswagen AG.