Go Back   English Forum Switzerland > Help & tips > Transportation/driving
Reply
 
Thread Tools Display Modes
  #1  
Old 30.06.2015, 23:30
Newbie 1st class
 
Join Date: Dec 2014
Location: Vaud
Posts: 25
Groaned at 3 Times in 1 Post
Thanked 1 Time in 1 Post
RuJoMa has become a little unpopularRuJoMa has become a little unpopular
Can I change Wheel Size?

I have a Tyre Question. My Toyota Rav4 takes 215/70 R16 tyres which need to be replaced. Somone is selling four 225/60 R16 tyres (including the Rims) . Will this small change in tyre dimensions still fit on my car, given that they are already on rims? or am I being stupid? ( or both)
Reply With Quote
  #2  
Old 30.06.2015, 23:34
Sean Connery's Avatar
Forum Legend
 
Join Date: Nov 2011
Location: Zurich
Posts: 4,924
Groaned at 75 Times in 70 Posts
Thanked 6,395 Times in 2,931 Posts
Sean Connery has a reputation beyond reputeSean Connery has a reputation beyond reputeSean Connery has a reputation beyond reputeSean Connery has a reputation beyond reputeSean Connery has a reputation beyond reputeSean Connery has a reputation beyond repute
Re: Can I change Wheel Size?

do you know what the offset and other measurements are and are they approved for your RAV4?
Reply With Quote
This user would like to thank Sean Connery for this useful post:
  #3  
Old 30.06.2015, 23:37
Newbie 1st class
 
Join Date: Dec 2014
Location: Vaud
Posts: 25
Groaned at 3 Times in 1 Post
Thanked 1 Time in 1 Post
RuJoMa has become a little unpopularRuJoMa has become a little unpopular
Re: Can I change Wheel Size?

Quote:
View Post
do you know what the offset and other measurements are and are they approved for your RAV4?
Thanks : Short answer : No I dont know.
Can you explain what you mean by "offset" ?
I never thought of finding out about being approved for RAV4 - will investigate.
Reply With Quote
  #4  
Old 30.06.2015, 23:42
st2lemans's Avatar
Forum Legend
 
Join Date: Dec 2010
Location: Lugano
Posts: 18,139
Groaned at 927 Times in 723 Posts
Thanked 19,714 Times in 9,477 Posts
st2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond repute
Re: Can I change Wheel Size?

Quote:
View Post
Can you explain what you mean by "offset" ?
Distance from the mounting flange to the rim.

Tom
Reply With Quote
The following 3 users would like to thank st2lemans for this useful post:
  #5  
Old 30.06.2015, 23:42
Sean Connery's Avatar
Forum Legend
 
Join Date: Nov 2011
Location: Zurich
Posts: 4,924
Groaned at 75 Times in 70 Posts
Thanked 6,395 Times in 2,931 Posts
Sean Connery has a reputation beyond reputeSean Connery has a reputation beyond reputeSean Connery has a reputation beyond reputeSean Connery has a reputation beyond reputeSean Connery has a reputation beyond reputeSean Connery has a reputation beyond repute
Re: Can I change Wheel Size?

the holes have to line up....
the wheel has to be in the right position in relation to the car

and that's before the circumference check which I can't be bothered to do....
Reply With Quote
The following 2 users would like to thank Sean Connery for this useful post:
  #6  
Old 30.06.2015, 23:43
Forum Veteran
 
Join Date: May 2006
Location: Near Geneva
Posts: 2,337
Groaned at 31 Times in 25 Posts
Thanked 2,532 Times in 1,240 Posts
Anjela has a reputation beyond reputeAnjela has a reputation beyond reputeAnjela has a reputation beyond reputeAnjela has a reputation beyond reputeAnjela has a reputation beyond repute
Re: Can I change Wheel Size?

Quote:
View Post
I have a Tyre Question. My Toyota Rav4 takes 215/70 R16 tyres which need to be replaced. Somone is selling four 225/60 R16 tyres (including the Rims) . Will this small change in tyre dimensions still fit on my car, given that they are already on rims? or am I being stupid? ( or both)
Don't know about the other technicalities, but changing your wheel size will affect your speedometer, and give a false reading.
Might be a small different to the true speed but could be important if you're driving over the limit.

Not that I'm advocating speeding in any way, shape, or form.
Reply With Quote
This user would like to thank Anjela for this useful post:
  #7  
Old 30.06.2015, 23:49
st2lemans's Avatar
Forum Legend
 
Join Date: Dec 2010
Location: Lugano
Posts: 18,139
Groaned at 927 Times in 723 Posts
Thanked 19,714 Times in 9,477 Posts
st2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond repute
Re: Can I change Wheel Size?

Quote:
View Post
Don't know about the other technicalities, but changing your wheel size will affect your speedometer, and give a false reading.
Might be a small different to the true speed but could be important if you're driving over the limit.
Almost 5% error in this case, albeit high (i.e. indicated 100 is only 95).

Tom
Reply With Quote
The following 3 users would like to thank st2lemans for this useful post:
  #8  
Old 01.07.2015, 00:05
Forum Legend
 
Join Date: Jun 2008
Location: Zurich
Posts: 4,652
Groaned at 152 Times in 118 Posts
Thanked 9,570 Times in 3,219 Posts
k_and_e has a reputation beyond reputek_and_e has a reputation beyond reputek_and_e has a reputation beyond reputek_and_e has a reputation beyond reputek_and_e has a reputation beyond reputek_and_e has a reputation beyond repute
Re: Can I change Wheel Size?

Quote:
View Post
Don't know about the other technicalities, but changing your wheel size will affect your speedometer, and give a false reading.
Might be a small different to the true speed but could be important if you're driving over the limit.

Not that I'm advocating speeding in any way, shape, or form.
The difference is less than 1%
https://www.tacomaworld.com/tirecalc...0r15-225-60r16

I would worry more about the wheels. If they are not for a Rav4 of the same model, then don't do it.
Reply With Quote
  #9  
Old 01.07.2015, 00:05
Forum Veteran
 
Join Date: May 2006
Location: Near Geneva
Posts: 2,337
Groaned at 31 Times in 25 Posts
Thanked 2,532 Times in 1,240 Posts
Anjela has a reputation beyond reputeAnjela has a reputation beyond reputeAnjela has a reputation beyond reputeAnjela has a reputation beyond reputeAnjela has a reputation beyond repute
Re: Can I change Wheel Size?

Quote:
View Post
Almost 5% error in this case, albeit high (i.e. indicated 100 is only 95).

Tom
I can never remember which way it goes....
#2 son was thinking of changing his Mini tyres from 10" to 12" as they're easier to source, but eventually decided it was simply too complicated to adjust everything else!
Reply With Quote
  #10  
Old 01.07.2015, 00:10
Forum Veteran
 
Join Date: Aug 2014
Location: Basel
Posts: 884
Groaned at 19 Times in 14 Posts
Thanked 564 Times in 349 Posts
Meerkat33 is considered knowledgeableMeerkat33 is considered knowledgeableMeerkat33 is considered knowledgeable
Re: Can I change Wheel Size?

check on the manual, the tires you can use are specified, for rims only if same material and size. apparently you can also ask to the section of circulation office
https://www.tcs.ch/it/test-sicurezza...i-generali.php
Anyway I wouldn't trust used wheels and tires if I have to be honest, maybe they're a bit deformed and you find out only later, also it's the only thing connecting your car to the ground, could mean death in emergency maneuvering. And you still gotta equilibrate them and stuff.
Reply With Quote
  #11  
Old 01.07.2015, 00:35
Newbie 1st class
 
Join Date: Dec 2014
Location: Vaud
Posts: 25
Groaned at 3 Times in 1 Post
Thanked 1 Time in 1 Post
RuJoMa has become a little unpopularRuJoMa has become a little unpopular
Re: Can I change Wheel Size?

OK thanks for the replies-- I conclude it wont work (or is too risky).
Glad I asked.
Reply With Quote
  #12  
Old 01.07.2015, 08:37
st2lemans's Avatar
Forum Legend
 
Join Date: Dec 2010
Location: Lugano
Posts: 18,139
Groaned at 927 Times in 723 Posts
Thanked 19,714 Times in 9,477 Posts
st2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond repute
Re: Can I change Wheel Size?

Quote:
View Post
The difference is less than 1%
https://www.tacomaworld.com/tirecalc...0r15-225-60r16

I would worry more about the wheels. If they are not for a Rav4 of the same model, then don't do it.
Umm, you are comparing 215-70/R15 to 225-20R16.

The OP stated 215-70/R16 to 225-60R16.

Hence, the nearly 5% (4.6%) that I previously stated.

Tom
Reply With Quote
The following 2 users would like to thank st2lemans for this useful post:
  #13  
Old 01.07.2015, 08:40
dodgyken's Avatar
Forum Legend
 
Join Date: Apr 2010
Location: Democratic Republic Kenistan
Posts: 9,821
Groaned at 340 Times in 276 Posts
Thanked 17,462 Times in 6,672 Posts
dodgyken has a reputation beyond reputedodgyken has a reputation beyond reputedodgyken has a reputation beyond reputedodgyken has a reputation beyond reputedodgyken has a reputation beyond reputedodgyken has a reputation beyond repute
Re: Can I change Wheel Size?

Quote:
View Post
OK thanks for the replies-- I conclude it wont work (or is too risky).
Glad I asked.
There are 2 things to consider:
1) The wheels: do they have the same number of bolt holes (4 or 5 stud)? Are they the same PCD (this is the diameter of centre hole? And finally is the offset (as mentioned by Tom) within the car's allowed range?

2) The tyres: the size 225/60R16 means they are 225mm wide, 60% of that high (profile) and to fit a 16" wheel. In order to measure the effect it would have you would need to do the following:
Circumference = Diameter * PI
Diameter = wheel size * 25.4(mm) + 2 * (tyre width * tyre profile/100)

So:
215/70R16 = 2,222mm circumference
225/60R16 = 2,125mm circumference

As per Tom's post - around a 5% difference.

A rough rules of thumb:
- If you go wider by 10mm drop the profile by 5% (in your case a 225/65)
- If you go bigger (R17) drop the profile by 5% (215/65)

If you were "slamming" a Opel Corsa you might go from 185/60R14 to 215/30R18 (+2 width, +4 diameter = -6*5% profile)

EDIT:
It is worth keeping in mind that the profile is a % of the width - and so a 30% profile on a 215 width tyre will give a far harder ride than one on a 285 width tyre
__________________
"Don't believe everything you read on the internet" Abraham Lincoln
Reply With Quote
This user would like to thank dodgyken for this useful post:
  #14  
Old 01.07.2015, 09:00
Forum Legend
 
Join Date: Jun 2008
Location: Zurich
Posts: 4,652
Groaned at 152 Times in 118 Posts
Thanked 9,570 Times in 3,219 Posts
k_and_e has a reputation beyond reputek_and_e has a reputation beyond reputek_and_e has a reputation beyond reputek_and_e has a reputation beyond reputek_and_e has a reputation beyond reputek_and_e has a reputation beyond repute
Re: Can I change Wheel Size?

Quote:
View Post
Umm, you are comparing 215-70/R15 to 225-20R16.

The OP stated 215-70/R16 to 225-60R16.

Hence, the nearly 5% (4.6%) that I previously stated.

Tom
Thanks. I googled but didn't click the link to check. Just copied
Reply With Quote
Reply




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
[FS-ZH] Logitech Driving Force GT gaming wheel + Wheel Stand Pro Chris5 Items for sale 6 19.12.2013 11:06
Can I change my profile name? Wisey Forum support 4 05.11.2012 14:57
Can aggressive women change? transition General off-topic 86 21.06.2011 13:23
Can I change my permit? 2funky Permits/visas/government 4 30.03.2011 14:51


All times are GMT +2. The time now is 08:03.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.1.0