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gros20
Fordmods Tyre Shredder
Posts: 379
Joined: 23 Jan 2005
Location: Rockhampton QLD, Australia
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 Posted: Mon Jan 21, 2008 3:56 pm Post subject: what size 19 tread on ef and was i reppied with pics FPVrims |
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ok i just bout 4 x 19" pre au fpv rims but the tread is 255/35 r19 is this to fat to fit under teh falcon. i've stacke dthem up on my spare and the tyre is bigger bya fair bit will it effect the speedo much?. i payed $1000 with 4 average tyres almost down to wear marks. few marks were nuts go there than that in good nick
please note bottom rim is standard efII xr6 rim
Last edited by gros20 on Mon Jan 21, 2008 4:06 pm, edited 1 time in total |
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FordFairmont
Fordmods - Getting Side Ways
Posts: 3009
Joined: 08 May 2007
Location: Sunny QLD, Australia
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| Posted: Mon Jan 21, 2008 4:00 pm Post subject: |
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"do fat i stacke dit up"....... "few marks were nuts go there than that"
huh? |
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smokin ef
Fordmods - Smokin em up
Age:19
Posts: 219
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Location: mildura VIC, Australia
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| Posted: Mon Jan 21, 2008 4:15 pm Post subject: |
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| only 1 way 2 find out.. give em a try!! |
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MoNGooSE
Cruise Moderator
Posts: 2231
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Location: Adelaide SA, Australia
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| Posted: Mon Jan 21, 2008 4:46 pm Post subject: |
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| Learn to use proper spelling and grammer. Take 5 mins and write it all properly and then maybe people will give you an answer. |
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FordFairmont
Fordmods - Getting Side Ways
Posts: 3009
Joined: 08 May 2007
Location: Sunny QLD, Australia
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| Posted: Mon Jan 21, 2008 5:17 pm Post subject: |
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| MoNGooSE wrote: | | Learn to use proper spelling and grammer. Take 5 mins and write it all properly and then maybe people will give you an answer. |
looks fixed now i can understand it 
The 255's will put the speedo out a little bit. When your speedo shows 100kph you are really doing 102kph.
Easiest fix is to fit 235/35 tyres and the speedo will be spot on |
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NCIILANE
Fordmods - Getting Side Ways
Age:35
Posts: 961
Joined: 21 Oct 2007
Location: Somewhere in Newie NSW, Australia
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| Posted: Mon Jan 21, 2008 5:46 pm Post subject: |
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| FordFairmont wrote: | | MoNGooSE wrote: | | Learn to use proper spelling and grammer. Take 5 mins and write it all properly and then maybe people will give you an answer. |
looks fixed now i can understand it
The 255's will put the speedo out a little bit. When your speedo shows 100kph you are really doing 102kph.
Easiest fix is to fit 235/35 tyres and the speedo will be spot on |
How the "beeeeep"(been contributing too much to the swear jar lately  ) does the width of the tyre affect the speedo? Don't you mean wall height of the tyre? |
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Gregg_13
Fordmods - Getting Side Ways
Age:28
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Location: Brisbane - Perth QLD, Australia
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| Posted: Mon Jan 21, 2008 6:01 pm Post subject: |
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| micknkell wrote: | | FordFairmont wrote: | | MoNGooSE wrote: | | Learn to use proper spelling and grammer. Take 5 mins and write it all properly and then maybe people will give you an answer. |
looks fixed now i can understand it
The 255's will put the speedo out a little bit. When your speedo shows 100kph you are really doing 102kph.
Easiest fix is to fit 235/35 tyres and the speedo will be spot on |
How the "beeeeep"(been contributing too much to the swear jar lately ) does the width of the tyre affect the speedo? Don't you mean wall height of the tyre? |
Well done you're a d***head. heres your sign. Of course the width will effect the speedo, the profile of the tyre will change, The profile is a percentage of the width of the tyre. therefore change the width the profile lowers. d***head, so pull your beeping head in and go do something constructive. |
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FordFairmont
Fordmods - Getting Side Ways
Posts: 3009
Joined: 08 May 2007
Location: Sunny QLD, Australia
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| Posted: Mon Jan 21, 2008 6:19 pm Post subject: |
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| micknkell wrote: | | FordFairmont wrote: |
The 255's will put the speedo out a little bit. When your speedo shows 100kph you are really doing 102kph.
Easiest fix is to fit 235/35 tyres and the speedo will be spot on |
How the... does the width of the tyre affect the speedo? Don't you mean wall height of the tyre? |
The height of the wall is always relative to the width of the tyre.
He could keep the same width and go a lower profile, but i thought it would be better to keep the same sidewall profile and choose a narrower tyre to help clearing the guards |
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NCIILANE
Fordmods - Getting Side Ways
Age:35
Posts: 961
Joined: 21 Oct 2007
Location: Somewhere in Newie NSW, Australia
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| Posted: Mon Jan 21, 2008 6:22 pm Post subject: |
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| Gregg_13 wrote: | | micknkell wrote: | | FordFairmont wrote: | | MoNGooSE wrote: | | Learn to use proper spelling and grammer. Take 5 mins and write it all properly and then maybe people will give you an answer. |
looks fixed now i can understand it
The 255's will put the speedo out a little bit. When your speedo shows 100kph you are really doing 102kph.
Easiest fix is to fit 235/35 tyres and the speedo will be spot on |
How the "beeeeep"(been contributing too much to the swear jar lately ) does the width of the tyre affect the speedo? Don't you mean wall height of the tyre? |
Well done you're a d***head. heres your sign. Of course the width will effect the speedo, the profile of the tyre will change, The profile is a percentage of the width of the tyre. therefore change the width the profile lowers. d***head, so pull your beeping head in and go do something constructive. |
I stand corrected.  It's a good day when you learn something new. Today I learnt 2 things;
1st thing:-
Tyre aspect ratio, what is it and why is it important?
Aspect ratio refers to the ratio between the tyres width and its side wall height. That is, a 205/60/15 size tyre has a 60% aspect ratio which means its side wall height is 60% of its width which is 205mm. Note that this is a ratio, not an absolute measurement so a 205/60 has a different side wall height measurement to a 195/60 even though the ratio is the same. The 15 refers to the wheel size in inches. 
2nd thing:-
You're a f**k. Constructive enough for you a**hole  |
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NCIILANE
Fordmods - Getting Side Ways
Age:35
Posts: 961
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Location: Somewhere in Newie NSW, Australia
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| Posted: Mon Jan 21, 2008 6:36 pm Post subject: |
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More CONSTRUCTIVE feedback on the subject for others like me that just aren't lucky enough to know it all! 
There is a common misconception when reading tyre sizes that the profile of the tyre is measured in millimeters which is not correct, so here is a guide on how to read those numbers on your tyres correctly!
Tyre Measurements (Passenger Vehicle)
185/60R14 82
185 - Section width in millimeter
60 - Aspect Ratio
R - Radial Construction
14 - Rim Diameter in inches
82 - Load index
Key features of a reduced aspect ratio are;
* less side wall flex hence the car will turn-in better with more precision,
* greater carcass rigidity allowing higher effective slip angles.
* Ideal for bigger Selbys Swaybars
* increased effective spring rate at the wheel often requiring reduced physical spring rate
* increased NVH
* ride quality deteriorates
* greater probability of tyre and wheel damage
Source: Whiteline Automotive
There! I feel better now |
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Gregg_13
Fordmods - Getting Side Ways
Age:28
Posts: 942
Joined: 03 Mar 2006
Location: Brisbane - Perth QLD, Australia
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| Posted: Mon Jan 21, 2008 7:04 pm Post subject: |
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| Ok I'll get down off my soap box and appologise for the abuse, just got in from work and its been lowsy, empty house so I vented on here, but tsk tsk, Princess, keep your panties on.... |
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NCIILANE
Fordmods - Getting Side Ways
Age:35
Posts: 961
Joined: 21 Oct 2007
Location: Somewhere in Newie NSW, Australia
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| Posted: Mon Jan 21, 2008 7:08 pm Post subject: |
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| Gregg_13 wrote: | | Ok I'll get down off my soap box and appologise for the abuse, just got in from work and its been lowsy, empty house so I vented on here, but tsk tsk, Princess, keep your panties on.... |
You started it b**ch! How'd I go with the research though? Meet with your appoval? |
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Gregg_13
Fordmods - Getting Side Ways
Age:28
Posts: 942
Joined: 03 Mar 2006
Location: Brisbane - Perth QLD, Australia
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| Posted: Mon Jan 21, 2008 7:16 pm Post subject: |
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| haha, nicework. |
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gros20
Fordmods Tyre Shredder
Posts: 379
Joined: 23 Jan 2005
Location: Rockhampton QLD, Australia
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| Posted: Mon Jan 21, 2008 8:28 pm Post subject: |
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ok back to teh point was 1000 a fair price and has anyone fitted 255 on a ef xr6?
so i should just ecept taht its going to be 2% out or i might even get 2 new 235's for the rear |
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FordFairmont
Fordmods - Getting Side Ways
Posts: 3009
Joined: 08 May 2007
Location: Sunny QLD, Australia
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| Posted: Mon Jan 21, 2008 8:33 pm Post subject: |
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| always put your skinnier tyres up front cause you need the clearance. The rears are usually ok, sometimes guard rolling needed. |
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fordriver1
Fordmods - Getting Side Ways
Age:36
Posts: 430
Joined: 16 Nov 2004
Location: adelaide SA, Australia
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| Posted: Mon Jan 21, 2008 8:44 pm Post subject: |
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if you think its a fair price, then it doesnt matter what we think dude.  |
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gros20
Fordmods Tyre Shredder
Posts: 379
Joined: 23 Jan 2005
Location: Rockhampton QLD, Australia
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| Posted: Mon Jan 21, 2008 8:56 pm Post subject: |
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| yea spose if nothing else ive saved $400 delivery for a set on ebay |
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revhead
Fordmods - Getting Side Ways
Age:40
Posts: 653
Joined: 05 Nov 2005
Location: oberon NSW, Australia
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| Posted: Mon Jan 21, 2008 10:09 pm Post subject: |
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The 255's will put the speedo out a little bit. When your speedo shows 100kph you are really doing 102kph.
Easiest fix is to fit 235/35 tyres and the speedo will be spot on[/quote]
Although your on the ball in regaurd to tyre size there is no mention of rim width. Ultra low profile tyres need to be matched closley with rim width or you may find your self with other problems. If the tyres you have are a perfect match with your wheels then it may be a better option to go with a 30 profile tyre in th same size as already fitted. |
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WAGHOON
Fordmods Stock as a Rock
Age:35
Posts: 124
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Location: rosebud VIC, Australia
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| Posted: Tue Jan 22, 2008 5:56 pm Post subject: |
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| we were coming back from the gold coast a few weeks ago in my wifes ef fairmont with 245,35,19's and got a speed reading of 108 on the "speed checker" just past the nsw/victorian boarder when the cars speedo was only reading 100k's??????????????? |
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revhead
Fordmods - Getting Side Ways
Age:40
Posts: 653
Joined: 05 Nov 2005
Location: oberon NSW, Australia
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| Posted: Tue Jan 22, 2008 10:49 pm Post subject: |
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| When most people change rim sizes they take it for granted that that the speedo will read the same unlike when changing diff ratios we all know that it will change the speedo and have an effect on fuell economy and excelleration power. fact is changing tyre and or rim sizes has the same effect. What every one needs to do when changing wheel trye combinations is to check that the rolling diameter of the tyre is within the limits of vehicle manufacteres specs or within +or- 15mm of the originial fitted tyre diamater to keep the speedometer within factory spec. All tyre dealers should have a book that states rolling diamater of each individual tyre size and should reference the book with sales outside standard fittment. |
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