Grant Member 453 Member For: 22y 5m 10d Location: Kurrajong, Sydney Posted 06/07/04 12:12 AM Share Posted 06/07/04 12:12 AM Ok guys, I'm looking at picking up some 19s for my car, and trying to get an idea online of cost. 1. Looking at 19x8.5, does anyone know what the width limit is for our cars?2. On the 17s that came with the car I believe the tyres were 235/45. I'm seeing the following options so far under 19s275/30215/35225/35235/35245/35275/35How do the number work??Help is much appreciated! Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/ Share on other sites More sharing options...
Pretzel EMS makes MAGIC MUMBO ! Member 192 Member For: 21y 5m Location: Melbourne Posted 06/07/04 12:22 AM Share Posted 06/07/04 12:22 AM (edited) Grant,The numbers are basically the width, and the height (In percentage of width) from what I understand.So a 234/45 (Standard 17's) is 235MM Wide, and the sidewall height is 45% of 235mm so about 95MM high.The thing you want to try to maintain is the rolling diameter (To maintain speedo accuracy, or inaccuracy as they come from the factory!) so to go to a larger rim, the aspect ratio will have to come down (Or get the spedo recalibrated some how)I don't know what fits under them, but think Brian (BCL) has a nice wide set on his car (But I'm not sure off hand what diameter they are)The other thing I can't work out is the same size tyre from two manufacturers can be visibly different in width Hope that at least helps a bit ! Edited 06/07/04 12:23 AM by Pretzel Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-140924 Share on other sites More sharing options...
bcl Toughest BA Turbo Lifetime Members 3,408 Member For: 22y 4m 18d Gender: Male Location: Sydney Posted 06/07/04 12:24 AM Share Posted 06/07/04 12:24 AM Grant,Here's what I posted last September:From what I can see there's not a lot of choice in tyre sizes to keep close to the overall stock diameter.From my checks using a falken tyre site I've found:stock 17" tyre of 235/45 has a diameter of 25.3 replacement (which I now use)front 245/35 19" has a diameter of 25.8; recommended rim 8"-9.5"rear 275/30 19" (as in your picture) has a diameter of 25.7; recommended rim 9.5"-11"I use 8.5" on front, and 9.5" on rear.Other links for more 19" wheel/tyre information:New Wheels, 19 inchPosted: Sep 3 2003, 01:51 PMhttp://www.fordxr6turbo.com/forum/index.ph...t=0entry47829Lowering - 19" Wheels, How far?Posted: Dec 16 2003, 11:20 AMhttp://www.fordxr6turbo.com/forum/index.ph...t=0entry74411Brian Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-140926 Share on other sites More sharing options...
Grant Member 453 Member For: 22y 5m 10d Location: Kurrajong, Sydney Posted 06/07/04 12:32 AM Author Share Posted 06/07/04 12:32 AM Thanks for the help guys, new wheels on the 17th, pics will be forthcoming of course Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-140928 Share on other sites More sharing options...
Guest Scootre Guests Posted 10/07/04 03:49 AM Share Posted 10/07/04 03:49 AM I read somewhere here a loooong time ago that after you alter the wheel / tyre combo you only have to get the dealer to reprogram the ECU for the new diameter. Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-142084 Share on other sites More sharing options...
ms700 Moderating Team 10,170 Member For: 22y 3m 11d Gender: Male Location: Sydney Posted 10/07/04 05:55 AM Share Posted 10/07/04 05:55 AM My speedo's out now after I fitted 19's, ill get it fixed one day..... its out by about 10% at 100kph! Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-142111 Share on other sites More sharing options...
SR-71 Blackbird Member 235 Member For: 21y 6m 4d Location: Mount Isa Queensland Go the Maroons Posted 11/07/04 04:12 AM Share Posted 11/07/04 04:12 AM ms700 said: My speedo's out now after I fitted 19's, ill get it fixed one day..... its out by about 10% at 100kph! http://www.fordxr6turbo.com/forum/index.ph...topic=11186&hl=Your dealer can recalibrate you speedo ms700 look throught the thread above spoke to fordtech.Calculate you overall wheel diameter give this a go:http://www.tyremaster.com.au/ Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-142313 Share on other sites More sharing options...
ms700 Moderating Team 10,170 Member For: 22y 3m 11d Gender: Male Location: Sydney Posted 11/07/04 05:19 AM Share Posted 11/07/04 05:19 AM Thanks SR, ill give that a crack! Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-142323 Share on other sites More sharing options...
DBOSS Faster than any BTA,XTC,Autotech, Nizpro and Tunehouse car Member 3,918 Member For: 21y 10m 20d Location: D SHIRE! Posted 11/07/04 06:51 AM Share Posted 11/07/04 06:51 AM Im looking at some new tyres myself and I can some tyres for a good price I was told they are Hancook's but the tyre itself say's ventures does anybody know if this is rightand also if 295/30/19's would be ok to put on 9.5 inch rims? Cheers JEFF Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-142335 Share on other sites More sharing options...
Dagabond Bored Member Administrator 35,722 Member For: 22y 5m 28d Gender: Male Location: Dé·jà vu Posted 11/07/04 07:35 AM Share Posted 11/07/04 07:35 AM ms700 said: Thanks SR, ill give that a crack! Are you sure you can trust your dealer Mick?? Link to comment https://www.fordxr6turbo.com/forum/topic/11695-tyre-sizes/#findComment-142344 Share on other sites More sharing options...
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