Can I put a 17 inch tyre on a 19inch rim?

Submitted: Sunday, Jun 30, 2019 at 20:28
ThreadID: 138628 Views:2024 Replies:11 FollowUps:8
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A stupid question I know but I will ask anyhow.
I have a set of 225/55 R19 tyres on Mag rims which are ending their useful lives but have a set of Cooper AT 235/65/R17 tyres that I have used for going bush that have still got approximately 70% of their tread left. My question is can I put the cooper tyres on the mag rims given there is a 2 inch difference?
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Reply By: Rod W6 - Sunday, Jun 30, 2019 at 20:33

Sunday, Jun 30, 2019 at 20:33
Simple answer, Try it. And if you bugger the 17" tyre then you'll know.
AnswerID: 626467

Reply By: Member - peter_mcc - Sunday, Jun 30, 2019 at 20:38

Sunday, Jun 30, 2019 at 20:38
No - they won't fit. Even if you could squeeze them on without breaking something I think you would void your insurance when something went wrong
AnswerID: 626468

Reply By: splits - Sunday, Jun 30, 2019 at 20:50

Sunday, Jun 30, 2019 at 20:50
No. Tyres have a high tensile multi strand steel cable inside the thick rubber section that contacts the wheel. If that section was just rubber, you would have no hope of keeping them on the rim.

You would need heavy hydraulic equipment to stretch it out to fit a larger diameter wheel. That would not only be illegal but very dangerous.
AnswerID: 626469

Reply By: RMD - Sunday, Jun 30, 2019 at 20:54

Sunday, Jun 30, 2019 at 20:54
You could try and seal the minus 50.8 mm size. Large truck tyre irons may help the fitting. Where there is a will there is a way.
Not so stupid as ridiculous and impossible.
AnswerID: 626470

Reply By: mechpete - Sunday, Jun 30, 2019 at 21:21

Sunday, Jun 30, 2019 at 21:21
you can.t be serious
mechpete
AnswerID: 626471

Reply By: Member - Outback Gazz - Sunday, Jun 30, 2019 at 22:08

Sunday, Jun 30, 2019 at 22:08
You would have more chance of stapling water to a tree !
AnswerID: 626472

Reply By: Member - christopher w2 - Sunday, Jun 30, 2019 at 22:47

Sunday, Jun 30, 2019 at 22:47
Thanks guys much appreciated for your comments
AnswerID: 626473

Follow Up By: Member - McLaren3030 - Monday, Jul 01, 2019 at 08:21

Monday, Jul 01, 2019 at 08:21
Hi Chris,

Try selling them on EBay or Gumtree.

Macca.
Macca.

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FollowupID: 900272

Reply By: Malcom M - Monday, Jul 01, 2019 at 11:34

Monday, Jul 01, 2019 at 11:34
19" - 17" will tell you how much you'll miss by.
AnswerID: 626479

Reply By: swampy - Monday, Jul 01, 2019 at 15:32

Monday, Jul 01, 2019 at 15:32
HI
Really give it a try!!
Send me a text and I will video the fit up and driving come crash . LOL

Totally red neck ,must be from Melbourne !!!

WTF NO
AnswerID: 626481

Follow Up By: Member - christopher w2 - Monday, Jul 01, 2019 at 16:23

Monday, Jul 01, 2019 at 16:23
As I said in my first sentence that I thought it was a stupid question but I would ask it anyway. I would have really been stupid to dispose of the tyres to find out later it could be done.
I didn’t think that I would be opening myself up to untoward criticism.
I pose the question on how would you feel if you asked a question outside the level of your expertise and got criticism for asking the question and being accused of being a red neck.
Treat people how you would like to be treated. If we all did this the world would be a much nicer place.
Have a great day and happy travels
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FollowupID: 900288

Follow Up By: Darian - Monday, Jul 01, 2019 at 17:14

Monday, Jul 01, 2019 at 17:14
Fair enough in response Christopher.
Just to add, I've always seen the issue simply as:

1. The 16", 17", 19" sizes etc. in tyre size descriptors is very simply the diameter of the hole in the centre of the TYRE.
2. To stay alive on our roads, one never fits tyres that don't conform exactly to the rim's / cars specifications (steel or alloy rims).
The car's handbook and the tyre placard on the A pillar should have that info.
Happy to see if anyone could make it more concise.
Cheers.
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FollowupID: 900289

Follow Up By: Member - Suitcase (QLD) - Monday, Jul 01, 2019 at 17:18

Monday, Jul 01, 2019 at 17:18
Well said Christopher
Suitcase
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Follow Up By: Ron N - Monday, Jul 01, 2019 at 23:29

Monday, Jul 01, 2019 at 23:29
Swampy, at the top of the Forum Index page is a grey button that says (Forum) "Terms & Rules".

Here is the direct link to the Forum Rules ...

Forum Rules

You really need to re-read the part about "personal attacks" (which are not tolerated in any half-decent forum, that I frequent).

As anyones old Grandma would say - "If you can't say anything nice, don't say anything at all".

Not everyone has the wealth of knowledge that you do.
Educating people to stop them from hurting themselves, when they lack what we experienced older four-wheel drivers would consider even basic knowledge, is what we need to do here, not sharply criticise and belittle them.

Cheers, Ron.
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FollowupID: 900304

Follow Up By: Blown4by - Wednesday, Jul 03, 2019 at 14:10

Wednesday, Jul 03, 2019 at 14:10
Agree. There is another one that says:

"Say what you mean but don't be mean when you say it."
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FollowupID: 900332

Reply By: Member - shane r1 - Monday, Jul 01, 2019 at 23:45

Monday, Jul 01, 2019 at 23:45
I’d like to thank Darian for the only sensible answer to the OP’s question, and RonN is absolutely correct as well

Chris,
Yes , simple as that , the last numeral in a tyre size is the diameter.
One will not fit another size rim.
and no they won’t stretch . The bead wires will break if you had something that could try to stretch it.
(25 years in the tyre industry I might know)

To the other posters
perhaps unless you know for sure what you’re talking about, wait for a bit and see if someone with the right knowledge replies.

And certainly no reason to be nasty!
AnswerID: 626482

Reply By: swampy - Tuesday, Jul 02, 2019 at 09:55

Tuesday, Jul 02, 2019 at 09:55
hi
There are Tyre and rim association standards . I`m sure there would be a legal reason as well from the same association .

Re fitted tyre to vehicle have same rim size /diameter . Unfortunately because it comes from factory it ""must be legal "". So this would be evidence of legals .
For a tyre fitter /mechanic it would be regarded as incompetence and a jailable offence .

Can u interchange/mix tyre/rim diameters NO

In a life threatening emergency yes , but I doubt its possible anyways .

Its a bit like reusing head gaskets . In the short term overheating happens twice and the jobs done twice . That's if the the motors not completely cooked the 2nd time .. Pointless costly exercise . The tyre could possibally cost your life.

There are tyre retailers who do practice poor fit ups . Tyres to wide for rim .
Poor wear and the risk of tyre blowing off the rim .

The tyre industry is not regulate and no experience or license required .

The only qualified person technically is a mechanic .
The worst part about is the award is minimum wage around 18--20$ for mechanics . A very very unregulated industry .
Most of the tyre retailers shouldn`t be paid the money they earn .
AnswerID: 626484

Follow Up By: Member - shane r1 - Tuesday, Jul 02, 2019 at 17:26

Tuesday, Jul 02, 2019 at 17:26
Swampy,
My reference was keeping it simple, just referring to the rim diameter. Yes there is a lot more to tyre fitments. (Most mechanic’s are not actually trained fully on tyres either)

I think , especially as you are the one to call the OP a redneck, you should give up while you’re behind.
Cheers
Shane
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FollowupID: 900312

Follow Up By: swampy - Tuesday, Jul 02, 2019 at 18:09

Tuesday, Jul 02, 2019 at 18:09
Hi
All mechanics are instructed in the skills of tyre changing .
Split rim industrial to passenger cars .Its not difficult . The larger earth moving tyres canbe easier .

Only redneck if u are asking the questions and have the tools .!! A competent tyre place should refuse .
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FollowupID: 900313

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