dougie350 Posted February 5, 2015 Posted February 5, 2015 hi everyone, ive recently fitted some hsd monopros and some rota gtr-ds to my z, ive only put the rear wheels on so far but everytime i drive it the slip light comes on? on the standard wheels its fine even with it being lowered so its something to do with the new wheels, the size of the rear wheels are 18x12 et20 so they are pretty huge, any ideas why the light is throwing up? many thanks. doug Quote
brillomaster Posted February 5, 2015 Posted February 5, 2015 (edited) what tyre sizes (width AND profile) are you using? guessing you didn't stretch the standard 245 onto a 12 inch rear Edited February 5, 2015 by brillomaster Quote
dougie350 Posted February 5, 2015 Author Posted February 5, 2015 haha no... ive got 265 35 18 on the 12j Quote
brillomaster Posted February 5, 2015 Posted February 5, 2015 (edited) hahah WOW that's a massive 5.45% smaller rolling diameter than the standard 245/45s, so the rear wheels are rotating a heck of a lot faster than they should be compared to the fronts, hence why tcs is throwing a right wobbly, it thinks you're in a state of perma-drift! http://www.willtheyfit.com/index.php?width=245&aspect=45&diameter=18&wheelwidth=8.5&offset=33&width2=265&aspect2=35&diameter2=18&wheelwidth2=12&offset2=20 also, muchos kudos on the insane amount of stretch, you could quite happily put a 315 on a 12" rim! Edited February 5, 2015 by brillomaster Quote
dougie350 Posted February 5, 2015 Author Posted February 5, 2015 im on the standard wheels at the front at the moment so 225 45 18 Quote
brillomaster Posted February 5, 2015 Posted February 5, 2015 tell you what, what width wheels are you planning to run on the front? assuming you don't want to replace the rear tyres, at least we can help you buy the correct matching size fronts so the TCS doesn't object (although the speedo will be wrong) Quote
Grundy Posted February 5, 2015 Posted February 5, 2015 hahah WOW that's a massive 5.45% smaller rolling diameter than the standard 245/45s, so the rear wheels are rotating a heck of a lot faster than they should be compared to the fronts, hence why tcs is throwing a right wobbly. http://www.willtheyf...2=12&offset2=20 also, muchos kudos on the insane amount of stretch, you could quite happily put a 315 on a 12" rim! Needs to run the stretch or the tread will be miles out the Arch. The issue your having is because of your front wheels. Wrong size tyres to accommodate the rear I believe. Quote
dougie350 Posted February 5, 2015 Author Posted February 5, 2015 aha well ive already bought some 225 40 18 for the front wheels which will be 10j wide! i never even thought about this problem when i was buying the wheels/tyres etc, should have been a clever boy and asked first lol! Quote
Grundy Posted February 5, 2015 Posted February 5, 2015 It's not the wheels causing you the issue, it's the wrong tyre combo. Quote
brillomaster Posted February 5, 2015 Posted February 5, 2015 hate to say it, but I don't think a 245/40 is gonna work... your new rears are currently 5.45% different to the standard rears, but the fronts you're planning to put on are only 1% different than the standard fronts - you'd need a 245/35 to match the 265/35 on the rear. have a play around on willtheyfit.com - basically, the rear wheels need to be 2.5% different to the fronts (the rears need to be 2.5% larger, so they rotate slightly slower than the fronts) Quote
dougie350 Posted February 5, 2015 Author Posted February 5, 2015 ah right ok... thanks very much guys, much appreciated! well ill have to have a look, luckily they are really cheap tyres (£76.99 a pair) so its not the end of the world even if it means i drive around with the tcs off till i buy some more! at least ill have fun in this wet weather! cheers again! 1 Quote
docwra Posted February 5, 2015 Posted February 5, 2015 Youll find that even with the TCS off the stability control still fires the brakes on the front wheels. Either take it out completely or unplug ABS unit to shut it down completely Quote
brillomaster Posted February 5, 2015 Posted February 5, 2015 Ironically... (I apologise this is purely theoretical and doesn't actually help at all) if you put the 265/35/18x12j wheels on the front, and the standard 225/45/18 fronts on the rear, the TCS would work fine with that, although looks and handling would suffer somewhat 1 Quote
brillomaster Posted February 5, 2015 Posted February 5, 2015 (£76.99 a pair) awaits Ekonas input 1 Quote
dougie350 Posted February 5, 2015 Author Posted February 5, 2015 hahaha i did actually see if the 12j would fit on the front....they didnt, would need epic arch work and funnily enough spacers to clear the calipers! not something id like to do! Quote
350 Russ Posted February 5, 2015 Posted February 5, 2015 I'm not sure I want to know the make of the front tyres for £76 a pair Quote
StevoD Posted February 5, 2015 Posted February 5, 2015 hahah WOW that's a massive 5.45% smaller rolling diameter than the standard 245/45s, so the rear wheels are rotating a heck of a lot faster than they should be compared to the fronts, hence why tcs is throwing a right wobbly, it thinks you're in a state of perma-drift! http://www.willtheyf...2=12&offset2=20 also, muchos kudos on the insane amount of stretch, you could quite happily put a 315 on a 12" rim! perma-drift sounds amazing Quote
Hell presidente Posted February 5, 2015 Posted February 5, 2015 If it's any help I'm running the gtr-d's, 10x18 front with 245/35 and 12x18 with 275/35 on the rear and no TCS issues at all. 1 Quote
dougie350 Posted February 5, 2015 Author Posted February 5, 2015 haha i knew the price of the tyres was going to cause some disconcern! here they are http://www.ebay.co.uk/itm/131404225305?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Quote
StevoD Posted February 5, 2015 Posted February 5, 2015 (edited) o i ran KR20 for a few month last summer also used they for al my drift days last year Good budget tyre, thats even a formula Drift approved tyre http://content.topgear.com/Wallpaper/big/bacmono4.jpg Edited February 5, 2015 by StevoD Quote
a2orry Posted February 5, 2015 Posted February 5, 2015 (£76.99 a pair) Exactly what I was thinking. awaits Ekonas input Quote
dougie350 Posted February 6, 2015 Author Posted February 6, 2015 Jus an update, put the front wheels on today (18x10-225 40 18) and all appears fine, no slip light so far thanks for all the help. Doug 1 Quote
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