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Topic: Tyre sizes (Read 690 times) |
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kittman
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Fibreglass at its best
 
Posts: 138
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Tyre sizes
« on: Feb 19th, 2008, 10:16pm » |
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Can I put 205/50/16 tyres on cossie alloys which have got 225/50/16 tyres on at the moment
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Scorpio_Mike
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Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
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Re: Tyre sizes
« Reply #1 on: Feb 19th, 2008, 10:32pm » |
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Tyres will probably fit BUT rolling radius will be smaller ( 3.17% less ) so fuel consumption will increase slightly & speedo will read incorrectly ( Slightly low - 70mph indicated / 67.78mph actual ).
Also check manufacturers original spec for insurance / modification reasons.
Check this website for all you ever wanted to know about tyres ( and some things you didn't ) : http://www.carbibles.com/tyre_bible.html
Tyre size comparison calculator is on page 2.
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Matt
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Manual'd and a 4.0 in the making
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Re: Tyre sizes
« Reply #2 on: Feb 19th, 2008, 10:33pm » |
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you can yes but i would advise against it, for one the cossie needs a good amount of traction, it may start to drift about on round abouts and fast corners.
also the alloy wheels were designed to take the larger tyre, so you would be stretching the smaller tyres to fit on the rim
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Matt
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Manual'd and a 4.0 in the making
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Re: Tyre sizes
« Reply #3 on: Feb 19th, 2008, 10:37pm » |
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the rolling radius will be the same as the tyre wall height hasnt changed, only the width of the tread
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Scorpio_Mike
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Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: Tyre sizes
« Reply #4 on: Feb 19th, 2008, 10:38pm » |
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on Feb 19th, 2008, 10:33pm, Matt wrote:you can yes but i would advise against it, for one the cossie needs a good amount of traction, it may start to drift about on round abouts and fast corners.
also the alloy wheels were designed to take the larger tyre, so you would be stretching the smaller tyres to fit on the rim |
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I'm with Matt on this. Cossie needs that extra grip - 225's on there for a reason.
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD
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Scorpio_Mike
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Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: Tyre sizes
« Reply #5 on: Feb 19th, 2008, 10:40pm » |
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on Feb 19th, 2008, 10:37pm, Matt wrote:| the rolling radius will be the same as the tyre wall height hasnt changed, only the width of the tread |
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Sorry, rolling radius will be less as the sidewall height is a percentage ( 50% ) of the tread width.
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Tyre sizes
« Reply #6 on: Feb 19th, 2008, 10:42pm » |
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Stand corrected! 
when the dunlops are done on my 17's i'll be upgrading to 235's! the 225s still seem a bit stressed under my driving conditions hehe
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martin_rowe
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I love YaBB 1G - SP1!
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Re: Tyre sizes
« Reply #7 on: Feb 20th, 2008, 8:53am » |
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originaly 24v had 195/65r15 tyres.
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kittman
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Fibreglass at its best
Posts: 138
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Re: Tyre sizes
« Reply #8 on: Feb 20th, 2008, 9:15pm » |
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I want to put my alloys on a mondeo due to death of the cossie I think 225's will be too wide. Mondeo spec in my book is 205's
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gozz
Senior Member
Been around awhile
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Re: Tyre sizes
« Reply #9 on: Feb 20th, 2008, 11:28pm » |
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Ah now the truth is out ! If the stud holes are OK,why not bolt em on and see if they scrape ?
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Tyre sizes
« Reply #10 on: Feb 22nd, 2008, 5:03pm » |
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the 225's wont fit the mondeo, the bloke i bough my cossie off tried they scrub, hole centres will be ok though
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v4-max aka Cheekyboy1
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focus cc mk3 mondeo 2.0 auto cbx750 vt600
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Re: Tyre sizes
« Reply #11 on: Feb 22nd, 2008, 8:04pm » |
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 yes they will fit, i have 225/40/18s on my scorp. they came off of a mk 2 mondeo.
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gozz
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Been around awhile
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Re: Tyre sizes
« Reply #12 on: Feb 22nd, 2008, 10:20pm » |
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Well,there you have it then kittman !
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Tyre sizes
« Reply #13 on: Feb 23rd, 2008, 2:09pm » |
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i based my comment on what cossie guy told me when i picked the car up, he said the 225's rubbed the front arches when on full lock.
the 18's you have on your scorpio would fit as the scorpio has bigger arches so the diffrence in offset wouldnt be a problem
the scorpio has a diffrent off set to the mondeo hense the 16" 12 spokes on the scorpio are diffrent to the ones fitted to the mondeo
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v4-max aka Cheekyboy1
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focus cc mk3 mondeo 2.0 auto cbx750 vt600
Posts: 563
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Re: Tyre sizes
« Reply #14 on: Feb 23rd, 2008, 8:44pm » |
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i was there when he took them off of his n plate mk 2 2.5ghia x mondano, that he was breaking (blown engine) the scorpio and the mondano are both listed as a 35-42 offset. i guess the only way kitt will find out is if he tries them, having read the thread again i see kits tyres are 225/50/16 where as mine are 225/40/18. so i really cant see a problem.
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