John E Posted March 23, 2001 Share Posted March 23, 2001 Has anyone fitted these instead of the 60 profile and if so what is the performance like. Also, do they look out of place on the car. Link to comment Share on other sites More sharing options...
c7kjt Posted March 23, 2001 Share Posted March 23, 2001 My seven runs 70 profile A021Rs. Can't comment on any performance differences due to the fact that the car has always run 70s, but you can see what they look like on my car by going to my site (see link below) Kevin Thomas kevin.thomas@bigfoot.com www.c7kjt.co.uk Link to comment Share on other sites More sharing options...
Graham Sewell Posted March 23, 2001 Share Posted March 23, 2001 Compared to the Michelin MXTs, they are absolutely brilliant. They don't look out of place, but then I have always had 70 profile tyres (Live axle) Cheers, Graham P.S. George Polley was doing them for ukp40 each incl fitting or postage Link to comment Share on other sites More sharing options...
AMMO Posted March 23, 2001 Share Posted March 23, 2001 I had the same dilemma. I was very tempted by the 70 profile. Higher gearing, more ground clearance, good. I am told they can be squirmy, bad. Went for the more expensive 60 profile in the end. Very nice, good straight line stability and under brakes. Not bad in the wet either. The previous tyres were also 60 profile so can't really compare. If you like I can take some pics and email them to you. Then you can compare with Kevin's car. AMMO Link to comment Share on other sites More sharing options...
John E Posted March 23, 2001 Author Share Posted March 23, 2001 Pictures would be excellent. Its not so much the cost more the effect on the car. I currently have 205's all round so the change to a 185x60 could be very significant on ground clearance etc. Link to comment Share on other sites More sharing options...
C7JFM Posted March 23, 2001 Share Posted March 23, 2001 can anyone help with a tel no. or address for george Pooley (?spelling) Link to comment Share on other sites More sharing options...
Graham Sewell Posted March 23, 2001 Share Posted March 23, 2001 George Polley Motors Station Road Ind Est Heathfield TN21 8DB 01435-863679 Link to comment Share on other sites More sharing options...
AMMO Posted March 23, 2001 Share Posted March 23, 2001 John, will mail you pics tomorrow. Just been out in the wet picking up my kid from school. He insisted we went for a bit of a ride. The braking is just great. Make sure that if you go for these tyres you get the fronts put on with the directional arrow facing backwards. This is to do with way the tyres are constructed. The drive on the rear is with the arrow facing forward, but the drive is in the opposite way under braking. Maybe I haven't explained it properly, but it does work. It's normal practice on motorcycles. I checked with George Polley himself and he confirmed this is correct. He did say you might have problems explaining this to the MOT tester if he notices it. My MOT tester is a motorcyclist so no problems. AMMO Link to comment Share on other sites More sharing options...
Dave H Posted March 23, 2001 Share Posted March 23, 2001 I have switched from 185/60's to 185/70's - A021's (rears only), and they don't make much difference on the road. In the dry on a track I think you would fell the difference. In the wet they are better than the A032's I had on, and they have loads more grip than the A008's I have on the front at the moment - damp understeer only, very hard to get the back to break away. As to looks, I think they fill the wheel arches better, and are more in proportion. Is George Polley still selling them at £40 each? Time to change the fronts. Link to comment Share on other sites More sharing options...
John E Posted March 23, 2001 Author Share Posted March 23, 2001 Well I'm moving towards 70's now and they are available at 40 per corner inc vat and delivery/fitting. Caterham suggest 3 1/2 inches clearance between the sump and hard stuff so a 60 profile will take me down by about 3/4 inch. To much me thinks. Link to comment Share on other sites More sharing options...
Pierre Gillet Posted March 23, 2001 Share Posted March 23, 2001 AMMO, If I understand well, the rear tyres must be installed according to the recommendation of the manufacturer, and the front tyres should be the opposite to improve their efficiency under braking? Did I get it right? Does anyone know the drawbacks if any of such setup of the front tyres? Cheers, Link to comment Share on other sites More sharing options...
Andrew Russell Posted March 23, 2001 Share Posted March 23, 2001 I have spoken to Yoko's technical department about this and they say in actual fact, it makes bugger all difference on a road car. It is all to do with the casing structure and even on race tyres they have had very few failures from being run in the wrong direction. It makes no difference whatsoever to grip/braking capabilities. MOT testers will probably ask you to fit the arrows so they revolve in the correct direction whilst 'officially' the correct way is to have the driven tyres running in the direction of the arrow and the non driven fronts on a seven running against the arrow, as previously suggested. But it really is of little advantage so don't be too worried....for these particular tyres. Andrew Link to comment Share on other sites More sharing options...
AMMO Posted March 23, 2001 Share Posted March 23, 2001 Andrew, what about a road car that is also used on a track? As for the "very few failures" comment, it's OK if the very few failures happen to someone else. If they were to happen to me I would not be too happy. I disagree that it makes no difference, it probably makes a very small difference. If that small difference stops me 20 cm from the parked skip opposed to 20 cm beyond or stops me from leaving the track and hitting the armco that's good enough for me. To be honest the critical tyre is the rear. That's why the manufacturer puts the little arrow on in the first place. The front is a lot less critical. I am not an expert, far from it, the older I get the less I know. I have seen what happens to a tyre when fitted back to front. As fitting the tyres the "official way" costs nothing, why not do it? Being (very) paranoid and set in my ways I will continue to do it my way. You are welcome to disagree and do it your way, or any other way you like. I can visualize a bunch of little Japanese geezers with specs and clipboards in Yokohama disagreeing with you though. AMMO Edited by - AMMO on 23 Mar 2001 22:18:00 Link to comment Share on other sites More sharing options...
Andrew Russell Posted March 25, 2001 Share Posted March 25, 2001 I was simply repeating what I was told by Yoko. Personally, I always fit the rears running with the arrow, and the fronts against the arrow. I tend to agree that they must be there for some purpose...... When I said the'direction' had no effect, I was referring to the handling/grip factor and not potential overall carcass strength. Andrew Link to comment Share on other sites More sharing options...
stevefoster Posted March 25, 2001 Share Posted March 25, 2001 The 70 profiles will be heavier. Not weighed any but perhaps 0.5 kg or so. Unsprung mass is critical.... If its a road car then 60's and a slightly raised ride height is what I have gone for. If you don't have adj. spring platforms then 70's are the answer. /Steve Link to comment Share on other sites More sharing options...
aideen Posted March 25, 2001 Share Posted March 25, 2001 or 185/60 on 14" wheels Aideen Link to comment Share on other sites More sharing options...
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