Hatat 15 Posted January 4 Share Posted January 4 Hi everyone hope you guys are fine 🙂 A question to RCF owners: I noticed whenever I start the car cold in mornings if I have to and while locking the steering wheel to either left or right direction for a u turn in stationary position the front tyres are making a weird pops sound as if they are locked and not moving at all they slip instead of moving never had this experience with my RC 300h, I haven’t experienced any vibration in national speeds so it’s not the alignment of wheels but don’t know.. Does anyone have or had same problem? I haven’t noticed this when whether was warmer though! thanks Quote Link to post Share on other sites
hockeyedwards 234 Posted January 4 Share Posted January 4 Think the term is 'crabbing', but its basically the tyre skipping on the surface. Happens in mine on cold mornings too 🙂 Quote Link to post Share on other sites
Rensin55 16 Posted January 4 Share Posted January 4 Yes, it’s a combination on low temperatures, slippery road surface, low profile summer tyres with hard sidewall at full lock. 3 Quote Link to post Share on other sites
Hatat 15 Posted January 4 Author Share Posted January 4 47 minutes ago, hockeyedwards said: Think the term is 'crabbing', but its basically the tyre skipping on the surface. Happens in mine on cold mornings too 🙂 Thanks mate I was thinking to contact local dealership, but once car gets warmer I don’t notice it :) Quote Link to post Share on other sites
Hatat 15 Posted January 4 Author Share Posted January 4 38 minutes ago, Rensin55 said: Yes, it’s a combination on low temperatures, slippery road surface, low profile summer tyres with hard sidewall at full lock. My tyres are Michelin Super Sport S, do you think if I change to something else I won't experience much? Quote Link to post Share on other sites
NemesisUK 1,628 Posted January 4 Share Posted January 4 Many marques suffer this same thing and recommend swapping to winter tyres for the colder months 1 Quote Link to post Share on other sites
hockeyedwards 234 Posted January 4 Share Posted January 4 1 hour ago, Hatat said: My tyres are Michelin Super Sport S, do you think if I change to something else I won't experience much? As above, but since switching to PS4's I havent noticed it as much... 1 hour ago, NemesisUK said: Many marques suffer this same thing and recommend swapping to winter tyres for the colder months I hear it's a hot topic on Merc forums! Quote Link to post Share on other sites
Silkmen 58 Posted January 4 Share Posted January 4 I had crabbing this morning on MPS4s, I've also experienced it on my old IS300H and IS220D which both had Goodyear asymmetric tyres. I've got use to it over the years and now don't really pay much attention to it. 1 Quote Link to post Share on other sites
Hatat 15 Posted January 4 Author Share Posted January 4 1 hour ago, Silkmen said: I had crabbing this morning on MPS4s, I've also experienced it on my old IS300H and IS220D which both had Goodyear asymmetric tyres. I've got use to it over the years and now don't really pay much attention to it. Oh intresteting, I never had this experience on my IS300h or RC300h only with RCF but glad to know it's kinda normal not a problem with my car 😁 Quote Link to post Share on other sites
Texas 508 Posted January 5 Share Posted January 5 Ditto here on my IS250, from what I can find out it’s the steering geometry setup that doesn’t totally align the front wheels perfectly in full lock situations ( which of course should only be happening at really low speeds!) Quote Link to post Share on other sites
Sundance 18 Posted January 5 Share Posted January 5 I find it too - as a recent first time Lexus owner - and given that it occurs the further you turn the wheels I've been wondering whether it's anything to do with the tight turning circle which is far tighter than most other cars I've owned. Quote Link to post Share on other sites
BillNick 54 Posted January 5 Share Posted January 5 Same, had this on almost all of my cars during the thicker Winter months. 1 Quote Link to post Share on other sites
Hatat 15 Posted January 5 Author Share Posted January 5 1 hour ago, BillNick said: Same, had this on almost all of my cars during the thicker Winter months. It's first for me, I was worried as something major might be wrong with car but now know it's common :) It does make me embarrassed if someone is sitting in the passenger seat lol but thanks God it doesn't in higher speed like turning in roundabouts! Quote Link to post Share on other sites
C.B 162 Posted January 7 Share Posted January 7 Had this on every car I've had with big wheels and low profile tyres pretty much. I think its less noticable when the tyres are brand new but becomes more noticable way before the tyres come close to needing replacing. Non issue I would say. 1 Quote Link to post Share on other sites
tomRCFcarbon 426 Posted January 18 Share Posted January 18 Ackerman geometry. Nothing wrong with your car. It’s physics. Quote Link to post Share on other sites
Vlady 404 Posted January 18 Share Posted January 18 I never had this effect on any of my BMW or any other cars, my first car with this "crabbing" effect is the GS, I even went to Lexus Glasgow and checked alignment but it didn't help. It was happening mostly in cold underground parkings, i think I had front tyres Bridgestone. When I changed tyres to all season this effect disappeared. On this forum I also heard that Mercedes and Jaguar suffer from this, however, I have 2 friends who own a C-class and an E-class and they never told me about this happening on their cars!. You can check also this thread: 1 Quote Link to post Share on other sites
KenMavor 67 Posted January 18 Share Posted January 18 10 hours ago, tomRCFcarbon said: Ackerman geometry. Nothing wrong with your car. It’s physics. ......and we all know......ye cannae change the laws of physics, Jim. I'll get my coat. 1 Quote Link to post Share on other sites
tomRCFcarbon 426 Posted January 18 Share Posted January 18 The stiffer the chassis, roll bars and suspension arms and the lower the profile of tyre...the more likely you are to feel it. Hence more common with high performance cars. Some manufacturers allow passive and some active steer rear wheels to minimise the effect. I think the TVD on the RCF compounds the problem as it doesn’t allow the rear wheels to turn at different speeds at parking speeds - so it exacerbates the ‘pushing’ effect. Winter tyres are usually softer compound with softer side walls. Quote Link to post Share on other sites
steve2006 2,105 Posted January 20 Share Posted January 20 On 1/5/2021 at 9:14 AM, Sundance said: I find it too - as a recent first time Lexus owner - and given that it occurs the further you turn the wheels I've been wondering whether it's anything to do with the tight turning circle which is far tighter than most other cars I've owned. An advantage of rear wheel drive cars .....a smaller turning circle 😀 Quote Link to post Share on other sites
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