Steve Gee Posted May 29, 2003 Share Posted May 29, 2003 Recently put on a new set of Toyo T1-s's, my 6th set! I had them inflated to the exact same pressures as all previous sets, 2.5 bar. The handling has since become very poor. Any bump I go over, is felt quiet harshly and the car bounces. I went over a cats-eye last night and the car physically moved sideways! Not good! Immediate attention turned to the tyres, but they are fine. The shocks were replaced early last year and have covered 40,000 miles, but they're Koni adjustables and can't have gone yet. So I guess it could be the springs, and purely coincidental that it all seemed to go wrong after a tyre change! Does this make sense? I'm gonna have to get it sorted soon, before all my fillings drop out!!!!! Any advice would be much appreciated. Thanks Steve Quote Link to comment Share on other sites More sharing options...
Daneway Posted May 29, 2003 Share Posted May 29, 2003 I am suffering very similar with new wheels and tyre combo! Frustrating as hell isn't it? And expensive on the dentistry!! Have you tried checking the pressures with another machine? Have you checked for concealed lumps/bumps or anything on the inside of the tyre? I guess your previous tyres were fine? Is it perhaps some ghastly coincidence where something else has happened triggered by your tyre change or "act of God"? Might be worth checking bolt tightness on f/susp and perhaps your tracking. Cheers, MARTIN Quote Link to comment Share on other sites More sharing options...
lovatt Posted May 29, 2003 Share Posted May 29, 2003 i have heard stories of bad tyre batches but i have never seen it myself Quote Link to comment Share on other sites More sharing options...
Steve Gee Posted May 29, 2003 Author Share Posted May 29, 2003 Not sure these symptons relate to tracking or tyre problems. Car still goes round corners and in a straight line, it just becomes unstable over bumps. I've already been in touch with Toyo to see if they changed the sidewall stiffness at all, to which they said no. Guess I'm going to have to take it somewhere, and pray I don't get stung for shocks!! Steve Quote Link to comment Share on other sites More sharing options...
Daneway Posted May 29, 2003 Share Posted May 29, 2003 I am having a similar problem with my new 19 inch Pacifics with Bridgestone Rainsport 1s. It's been suggested that it was my tyres, but I didn't think it was possible until I saw your post! Best of luck! It'd be good to hear the outcome. MARTIN Quote Link to comment Share on other sites More sharing options...
Need4Speed Posted May 30, 2003 Share Posted May 30, 2003 Shock absorbers are cheaper than tyres. What size are your tyres? Quote Link to comment Share on other sites More sharing options...
Steve Gee Posted May 30, 2003 Author Share Posted May 30, 2003 I'm on Fronts 235/40s and Rears 255/35s on 18" wheels, and have been for over two years. I suppose it is possible that it's a bad batch of tyres. Tell you what I have just noticed, that when I close the door, not slam it, I can see the sidewall move on the rear tyre. Now that may be normal, but there again it might not be! I might take it to the tyre suppliers tomorrow. I'll let you know. Steve Quote Link to comment Share on other sites More sharing options...
Flavio Posted May 30, 2003 Share Posted May 30, 2003 If your sidewalls are too soft you should feel that when going round corners shouldn't you? A friend of mine had this problem on his Impreza when he fitted some Falken tires, it was plainly dangerous to drive! When he switched back to Pirelli's the car felt safe again. Flavio http://www.imagestation.com/picture/sraid14/p142c9363fa12dc3dab98011a9003dc88/fde38afb.jpg Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 30, 2003 Share Posted May 30, 2003 I put on some Dunlop SP9000's at the rear once as I got them on the cheap, I didn't realise that, compared to the Pirelli P0's I usually run and still had on at the front, they were made of blancmange. The handling went to pot, downright dangerous at points. Tramlined appallingly, changing lanes on dual carriageways was terrifying, forget overtaking on A roads, and long sweeping bends meant loads of corections while taking them. After a full suspension alignment check and experimenting with different tyre pressures, I bit the bullet and went back to Pirelli's on the back. The change in handling was instantly noticeable, it was back to taut and communicative. I absolutely murdered the car for the rest of the day, with a huge grin on my face, as it had become a joy to drive once more So, overly soft tyres mixed with stiff-sidewalled ones can cause huge changes in handling (for the negative). -Ian Quote Link to comment Share on other sites More sharing options...
Steve Gee Posted May 31, 2003 Author Share Posted May 31, 2003 Update: Took the car back to the company that fitted the tyres. When they saw the tyre wobble when I closed the door, they agreed it wasn't right. They are going to contact Toyo and get them down to look at my car. In fact the wrote down "Jelly Tyres" in their diary. Maybe it is a bad batch. I'll let you know. Steve Quote Link to comment Share on other sites More sharing options...
Supra_Al Posted May 31, 2003 Share Posted May 31, 2003 ......Have 18" F1's on mine, they handle beautifully! Al. Quote Link to comment Share on other sites More sharing options...
Steve Gee Posted June 4, 2003 Author Share Posted June 4, 2003 Further Update: The rear tyres were taken off and we found that the inner shoulders on one of the tyres had small cracks in the sidewall. I had previously had a bolt through that tyre which I thought I had spotted pretty quickly and that I hadn't been running it on a reduced pressure for too long. However, the Technical guy from Toyo said that these cracks were probably caused by running the tyre with too low pressures. The other tyre was fine apart from a nail in it, but it wasn't losing pressure. Both tyres were replaced FOC, and the car is now back to how it has been for the last 60,000 miles. I'm happy, and both Toyo and Orbit Tyres in Rushden deserve credit for their handling of this problem. Many thanks to them! I can burn some tarmac tonight!!!!!!!! Cheers Steve Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 4, 2003 Share Posted June 4, 2003 Originally posted by Steve Gee Further Update: The rear tyres were taken off and we found that the inner shoulders on one of the tyres had small cracks in the sidewall. I had previously had a bolt through that tyre which I thought I had spotted pretty quickly and that I hadn't been running it on a reduced pressure for too long. However, the Technical guy from Toyo said that these cracks were probably caused by running the tyre with too low pressures. The other tyre was fine apart from a nail in it, but it wasn't losing pressure. Both tyres were replaced FOC, and the car is now back to how it has been for the last 60,000 miles. I'm happy, and both Toyo and Orbit Tyres in Rushden deserve credit for their handling of this problem. Many thanks to them! I can burn some tarmac tonight!!!!!!!! Cheers Steve Sounds like you were lucky and that at least one tyre had internal carcass damage. it's that sort of thing that causes "unexpected" blowouts. Low profile tyres often won'6t stand running at nearly flat for even a few yards as the cars weight just breaks the cords in the tyres construction. Quote Link to comment Share on other sites More sharing options...
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