coreys912516 Bronze Donating Members 217 Member For: 12y 4m 3d Gender: Male Location: wollongong Posted 26/05/14 12:55 PM Author Share Posted 26/05/14 12:55 PM 245/35R19 fronts are the best cause its only 0.14 % bigger than the 245/40R18 and the rear 275/30R19 is -0.86% smaller than 245/40R18 so its with in 3% so that means when im going 112.65kmph ill be really going 113.65kmph Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 4m 6d Gender: Male Location: Perth Posted 26/05/14 01:23 PM Share Posted 26/05/14 01:23 PM (edited) But most people fit 275/30/20 = 674mmOD and 275/35/19 is 675mm OD Car will be more comfortable and grip better with the taller tyres.GT R spec runs 275/35/19 Edited 26/05/14 01:26 PM by arronm Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,331 Member For: 19y 5m 9d Gender: Male Location: Perth Posted 26/05/14 01:37 PM Share Posted 26/05/14 01:37 PM 2 Link to comment Share on other sites More sharing options...
Panda Eyes flame magnet Gold Donating Members 5,674 Member For: 16y 9m 16d Gender: Male Location: adelaide hills- 'race air' central Posted 26/05/14 11:18 PM Share Posted 26/05/14 11:18 PM ah 19's not 20's. yes 40/35 profile is best. my bad Link to comment Share on other sites More sharing options...
Bellato Donating Members 2,713 Member For: 14y 4m 13d Posted 27/05/14 12:46 AM Share Posted 27/05/14 12:46 AM 245/35R19 fronts are the best cause its only 0.14 % bigger than the 245/40R18 and the rear 275/30R19 is -0.86% smaller than 245/40R18 so its with in 3% so that means when im going 112.65kmph ill be really going 113.65kmphBut most people fit 275/30/20 = 674mmOD and 275/35/19 is 675mm OD Car will be more comfortable and grip better with the taller tyres.GT R spec runs 275/35/19My 20's with 245/35 put the speedo out but like 3km from where it was. For the sake of 3km difference I would go the extra 5% profile and enjoy the comfort and grip it offers Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 4m 6d Gender: Male Location: Perth Posted 27/05/14 12:58 AM Share Posted 27/05/14 12:58 AM (edited) homersimpson1.jpgSee how intelligent I look with glasses Edited 27/05/14 01:01 AM by arronm Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,331 Member For: 19y 5m 9d Gender: Male Location: Perth Posted 27/05/14 12:59 AM Share Posted 27/05/14 12:59 AM I was thinking if we added a few more strands of hair it wouldn't be too far off the the mark?? Link to comment Share on other sites More sharing options...
coreys912516 Bronze Donating Members 217 Member For: 12y 4m 3d Gender: Male Location: wollongong Posted 27/05/14 03:32 AM Author Share Posted 27/05/14 03:32 AM I'm not going 20"S I'm going 19's. Not really bothered I have 1,000 tyres on hand if I want to change the profile perks of being a tyre fitter Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 4m 6d Gender: Male Location: Perth Posted 27/05/14 10:57 AM Share Posted 27/05/14 10:57 AM We know you arnt getting 20's. But do you understand what we are trying to say.35/30 is the wrong profile Link to comment Share on other sites More sharing options...
Bellato Donating Members 2,713 Member For: 14y 4m 13d Posted 27/05/14 11:57 AM Share Posted 27/05/14 11:57 AM I used my 35 profile 20 for comparison to a 40 profile 19 because they're basically the same. Point being speedo won't be out enough to worry about, extra comfort and grip. I can get cost price tyres, but why not just get it right the first time... Link to comment Share on other sites More sharing options...
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