RogerH Posted March 31, 2015 Report Share Posted March 31, 2015 Hi Folks, my 4A front tyres are both wearing on the inner 1/4 of the tread. What causes this and can it be equalised over more of the tread. Roger Quote Link to post Share on other sites
peejay4A Posted March 31, 2015 Report Share Posted March 31, 2015 Too much toe out or bushes too compliant allowing toe out when under way. Quote Link to post Share on other sites
RogerH Posted March 31, 2015 Author Report Share Posted March 31, 2015 Hi Pete, they are SupePro bushes, so I would have thought they were OK. I'll get my man to stick my toes in. Roger Quote Link to post Share on other sites
Graze Posted March 31, 2015 Report Share Posted March 31, 2015 Can excessive negative camber cause this? Graze Quote Link to post Share on other sites
stuart Posted March 31, 2015 Report Share Posted March 31, 2015 Can excessive negative camber cause this? Graze It can but in Rogers case I would have said toe out more likely. Stuart. Quote Link to post Share on other sites
RogerH Posted March 31, 2015 Author Report Share Posted March 31, 2015 Hi Graze, I checked the camber last year and it was spot on (ish). Roger Quote Link to post Share on other sites
McMuttley Posted March 31, 2015 Report Share Posted March 31, 2015 corner a lot harder Quote Link to post Share on other sites
Peter Cobbold Posted March 31, 2015 Report Share Posted March 31, 2015 Drive backwards to equalise the wear. Quote Link to post Share on other sites
Prefect Posted March 31, 2015 Report Share Posted March 31, 2015 I've got wear on the inside of a front tyre also but just the near side the off side is fine with equal wear. I thought if toe out was the cause then both tyres would suffer, am I wrong? What could make the near side only wear? Quote Link to post Share on other sites
peejay4A Posted March 31, 2015 Report Share Posted March 31, 2015 I think a four wheel alignment is probably in order. Quote Link to post Share on other sites
Peter Cobbold Posted March 31, 2015 Report Share Posted March 31, 2015 (edited) I've got wear on the inside of a front tyre also but just the near side the off side is fine with equal wear. I thought if toe out was the cause then both tyres would suffer, am I wrong? What could make the near side only wear? Yes toe out with both sides of the suspension symmetrical will wear both. I had that 'one side toe' many years ago. I am pretty sure it was wishbone bush(es) that have got tired. A worn lower bush, inner or outer, will allow the upright to move rearwards. So the two sides are no longer symmetrical. Even if the toe-in has been freshly set. I'd expect the steering to pull to the nearside, on a flat road. The top bushes may also be worn. Peter Edited March 31, 2015 by Peter Cobbold Quote Link to post Share on other sites
TR NIALL Posted April 1, 2015 Report Share Posted April 1, 2015 Check Suspension Turrets,I've seen 2 Cars where they have Torn Away on the Welds. Quote Link to post Share on other sites
stuart Posted April 1, 2015 Report Share Posted April 1, 2015 Also check lower inner mounts for the amount of shims fitted to front and rear. Stuart. Quote Link to post Share on other sites
John Morrison Posted April 1, 2015 Report Share Posted April 1, 2015 (edited) Before we all go gloom and doom and buy loads of suspension bits and bobs, - what kind of tyre wear? From Rogers original question through to Prefects query, very first thing you need to look at is, if the wear is feathered or not. Place a hand on the crown of the tyre, and move it across towards the centre of the car and than back again. If you feel the tyre smooth going 'in' and rasped coming out then that wheel is 'Toeing in' If the opposite is the case i.e. smooth 'out' and rasped going 'in' then that wheel is 'Toeing out' Simple rule;- Smooth in = Toe-in Smooth Out = Toe-out What the fearthering shows is that that tyre is being 'dragged' along at a slight angle and is not rolling along the same line as the vehicle. An alignment problem, of one sort or another. IF there is no feathering, but smooth sloped wear, then the tyre is rolling along the road in line with the vehicle, and is having a sideways force applied, possibly excessive camber, but your first check is for 'Feathering' This pre-suposes that the tyres have not been moved around the vehicle. John Edited April 1, 2015 by john Quote Link to post Share on other sites
RogerH Posted April 1, 2015 Author Report Share Posted April 1, 2015 Hi John, that sounds very clever indeed. I'll have a look this afternoon. Roger Quote Link to post Share on other sites
Geko Posted April 1, 2015 Report Share Posted April 1, 2015 Hi Graze, I checked the camber last year and it was spot on (ish). Roger and that was before or after you tore the lower fulcrum bracket ? Quote Link to post Share on other sites
RogerH Posted April 1, 2015 Author Report Share Posted April 1, 2015 Ah yes the wishbone bracket I checked it afterwards thankfully Roger Quote Link to post Share on other sites
ianc Posted April 2, 2015 Report Share Posted April 2, 2015 The IRS cars have the disadvantage that the two rear wheels may not be pointing in the same direction, and any misalignments at the rear will have some effect(s) on the front end. Ian Cornish Quote Link to post Share on other sites
peejay4A Posted April 2, 2015 Report Share Posted April 2, 2015 And a properly done four wheel alignment on a Hunter system ought to see to it. This was the first thing I had done when I completed my rebuild. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 2, 2015 Report Share Posted April 2, 2015 Roger Your problem is obvious. You should discipline yourself to cross London's 'speed cushions' by equal manouvres of straddling, then by going between, then left wheel up, then right wheel up. start again. Gives you something to think about and do in our streets. https://www.google.co.uk/search?q=speed+cushion+image&tbm=isch&imgil=imppId1aREx7XM%253A%253Bmt0RQbJp3mfmkM%253Bhttp%25253A%25252F%25252Fwww.406oc.co.uk%25252Fviewtopic.php%25253Ff%2525253D5%25252526t%2525253D20222&source=iu&pf=m&fir=imppId1aREx7XM%253A%252Cmt0RQbJp3mfmkM%252C_&usg=__pavsnqLhZjYqpnryqpuzjUaQw1U%3D&biw=1280&bih=836&ved=0CDgQyjc&ei=0gQdVeHMNoTyUqD0gagI#imgrc=imppId1aREx7XM%253A%3Bmt0RQbJp3mfmkM%3Bhttp%253A%252F%252Fcms.esi.info%252FMedia%252FproductImages%252FCharcon_Specialist_Products_Speed_Pod_speed_cushion_road_traffic_safety_3.jpg%3Bhttp%253A%252F%252Fwww.406oc.co.uk%252Fviewtopic.php%253Ff%253D5%2526t%253D20222%3B550%3B455 I reckon if they scraped the road humps off they would have more than enough tarmac to fill the pot holes. Peter W Quote Link to post Share on other sites
RogerH Posted April 2, 2015 Author Report Share Posted April 2, 2015 They are often called 'sleeping policemen' but they never use real policemen. Lack of imagination. Roger Quote Link to post Share on other sites
Prefect Posted April 3, 2015 Report Share Posted April 3, 2015 Thanks to all for the advice I am away from the rock for a week or two on my return I will try all advice. The tyre in question (NS front) is US now so must solve the mystery before replacing it. Quote Link to post Share on other sites
Prefect Posted April 29, 2015 Report Share Posted April 29, 2015 Hello All. I finally got my wheel allignement checked on a posh machine and it confirmed my camber angle is different LH to RH. These are the results: Left Front -1deg 59 mins Camber -0 deg 28 mins toein Right Front +0 deg 11 mins Camber -0 deg 27 mins toein No wonder inside of the Left Front tyre was worn! Left Rear -1 deg 54 mins Camber 0 deg 01 mins toe out Right Rear -2 deg 03 mins Camber - 0 deg 16 mins toein The rear looks acceptable to me . Plan to check the lower wishbone shims this weekend see if I can move some LHS to RHS. Quote Link to post Share on other sites
Andy Moltu Posted April 30, 2015 Report Share Posted April 30, 2015 What's the toe in figure in degrees supposed to be? Quote Link to post Share on other sites
Guest ntc Posted April 30, 2015 Report Share Posted April 30, 2015 Hello All. I finally got my wheel allignement checked on a posh machine and it confirmed my camber angle is different LH to RH. These are the results: Left Front -1deg 59 mins Camber -0 deg 28 mins toein Right Front +0 deg 11 mins Camber -0 deg 27 mins toein No wonder inside of the Left Front tyre was worn! Left Rear -1 deg 54 mins Camber 0 deg 01 mins toe out Right Rear -2 deg 03 mins Camber - 0 deg 16 mins toein The rear looks acceptable to me . Plan to check the lower wishbone shims this weekend see if I can move some LHS to RHS. I would take a long hard look at the chassis before you change anything Quote Link to post Share on other sites
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