Chris Wilson Posted March 25, 2013 Share Posted March 25, 2013 It's bad enough using rims that NEED spigot adaptor rings. Let alone using them WITHOUT the rings fitted. Without them you risk wheel stud failure, and will almost certainly never achieve a repeatable wheel balance. Personally I'd like to see government legislation on aftermarket wheels, where safety came first, and good taste a close second Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 25, 2013 Author Share Posted March 25, 2013 So it has spigot rings in there. They seem to fit quite snug. Just got the wheels rebalanced for free (it was free the first time as well) and its made a difference. It is better at 70mph but still not great when it gets to 80/90mph. One thing that was noticed before, a few of the wheel nuts are odd. The bloke in the garage thinks it could be because of this. As in they might not be holding the wheel on quite right. So I'm going to buy a whole set of nice new wheels nuts, change them over and see if that makes any difference. Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 Sorted it as of a few days ago but I was just too lazy to post about it. It was as me and the bloke in the garage suspected. Wheels nuts needed changing. I had these stupid things called "wobble nuts" or something like that. They look really flimsy and are a pretty stupid design. Their purpose (for anyone who doesn't know) are to pull wheels straight that have a slightly wrong offset. The tapered part of the but wobbles about as if the nut is in two pieces. The wall around the thread is so thin that 3 of the nuts were actually split!! On the front as well. To add to this there was one odd nut that as still a wobble nut to just smaller. I'll post up a couple pics later if anyone would like to see? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 30, 2013 Share Posted March 30, 2013 You mean they are those abortions that are "designed" to accomodate rims with the wrong stud PCD. This "cure" shows that the wheel nuts are locating the rims concentrically and not the spigots on the hubs. The wobble may have gone, but I suspect the set up is still, from an engineering point of view, dangerous. Quote Link to comment Share on other sites More sharing options...
Dnk Posted March 30, 2013 Share Posted March 30, 2013 You mean they are those abortions that are "designed" to accomodate rims with the wrong stud PCD. This "cure" shows that the wheel nuts are locating the rims concentrically and not the spigots on the hubs. The wobble may have gone, but I suspect the set up is still, from an engineering point of view, dangerous. Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 You mean they are those abortions that are "designed" to accomodate rims with the wrong stud PCD. This "cure" shows that the wheel nuts are locating the rims concentrically and not the spigots on the hubs. The wobble may have gone, but I suspect the set up is still, from an engineering point of view, dangerous. So if its not the wheel nuts, not the balancing, and the car has just passed MOT with no advisories and no play in anything to do with the wheels. Then what could it possibly be? Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 I'm very lost here, the wheel balancing is fine, the wheels are straight (checked on the balancing machine) so the wheels themselves are fine, the tyres are fine. I fail to see a problem anymore. Nothing is loose on the wheel hub assembly. Quote Link to comment Share on other sites More sharing options...
Pulley Posted March 30, 2013 Share Posted March 30, 2013 i think i read you say that all 4 wheels are the same and the tyres are just narrower on the front if i were you id swap front to back and see if vibration still occurs if it does in the same way then you know its hub related, or something else Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 30, 2013 Share Posted March 30, 2013 The wobble nuts 'suggest' the wheels are not the correct ie 114 5 pcd? When you took off the old nuts and replaced with new ones can you remember if the wheel studs were all central in the wheel holes? The wobble nuts I think are used to allow you to put on wheels with say 112x5 pcd. Have you checked the inside of the wheels to see what is stamped on them? If they are true and balanced as you say and if they are 114x5 pcd and if the spigot rims are tight to the hub and tight to the wheels then it's not unsafe. Quote Link to comment Share on other sites More sharing options...
Dnk Posted March 30, 2013 Share Posted March 30, 2013 As Scooter says above, you need to check the PCD of your wheels, if you have the wrong PCD and are now using normal wheel nuts the wheels will not be correctly fitted to the car. I'd be checking this asap, if the wheels have the wrong PCD then the normal wheel nuts will be trying to pull the studs either inward or outward Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 What is PCD? Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 Don't worry I just searched it Quote Link to comment Share on other sites More sharing options...
Dnk Posted March 30, 2013 Share Posted March 30, 2013 (edited) Here's a bit of a sketch to show what i mean hopefully The wheel is in black showing the hole, the stud is red and the nut in blue, if the pcd of the wheel is too big or too small the chamfer on the nut will try to pull the stud over because its not sitting in the centre of the hole in the wheel. Hence the wobble nuts were fitted Edited March 30, 2013 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 Taken my wheel off to measure the pcd of the wheels but where do I measure it? I read online I can measure from the centre of one hole to the centre of another and multiply by 1.701 but that brings up a stupid number well above 114 Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 So to measure it I found out the radius and x2 it gives me 126 on both the hub and the wheel :/ am I doing something wrong? Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 Ignore me idiot measuring skills haha. Measured 4 times now. 114 on both Quote Link to comment Share on other sites More sharing options...
ashbuster Posted March 30, 2013 Share Posted March 30, 2013 should it be 114.3 on a supra Quote Link to comment Share on other sites More sharing options...
Twisted Posted March 30, 2013 Author Share Posted March 30, 2013 (edited) Is it common practice for manufacturers to make a wheel that has everything the same size apart from a couple mil difference on the PCD? Reason I asked, after measuring, but not being 100% confident with my accuracy I searched online for the wheels and every set I found had the correct PCD for a supra. I also have a suspicion that someone had alloys on there before that weren't quite right for the supra and had those wobble bolts on there. Then the wheels were changed but the bolts weren't. Edited March 30, 2013 by Twisted (see edit history) Quote Link to comment Share on other sites More sharing options...
Dnk Posted March 31, 2013 Share Posted March 31, 2013 (edited) The easiest thing to do is jack the car up and undo all 5 wheel nuts, make sure the wheel is sitting flat against the hub and do up all the nuts finger tight. It should be pretty obvious if the tapers on the nuts are sitting correctly in the tapers in the wheel holes Edited March 31, 2013 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Dnk Posted March 31, 2013 Share Posted March 31, 2013 http://www.gomog.com/allmorgan/wheeloffset.html Here's some useful info for you Quote Link to comment Share on other sites More sharing options...
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