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Heavy steering problems
exigejoe
 

Posts: 287
Joined: Oct 2011
Location: Tacoma/Fircrest, WA
Post: #11
RE: Heavy steering problems

but isnt overall diamater about the same in 19 with 55s as opposed to 20 with 45s. IDK

Lotus Exige (aspen white) with VF supercharger kit, 413hp, 366lb/ft
Range Rover Evoque in fuji white and almond/espresso interior
2013 Audi A7 3.0T supercharged
17-10-2011 09:20pm
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PhilSkill
 

Posts: 3,880
Joined: Jun 2011
Location: Warwickshire
Post: #12
RE: Heavy steering problems

(17-10-2011 09:20pm)exigejoe Wrote:  but isnt overall diamater about the same in 19 with 55s as opposed to 20 with 45s. IDK

19" with 235/55 Dia 741mm
20" with 245/45 Dia 729mm

No guarantee this is correct by the way! Wink

MY12 Fuji Dynamic SD4 Manual, Pano Roof, Electric Tailgate with own Close module
[Image: 124529.png][Image: 1004887.png]
(This post was last modified: 17-10-2011 10:11pm by PhilSkill.)
17-10-2011 09:26pm
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exigejoe
 

Posts: 287
Joined: Oct 2011
Location: Tacoma/Fircrest, WA
Post: #13
RE: Heavy steering problems

They shoud use 255 to close up the gap or use a 50 profile. I might use 50 instead of 45 when i get my 20s.

Lotus Exige (aspen white) with VF supercharger kit, 413hp, 366lb/ft
Range Rover Evoque in fuji white and almond/espresso interior
2013 Audi A7 3.0T supercharged
17-10-2011 09:42pm
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mark_n
 

Posts: 1,720
Joined: Jul 2011
Location: London
Post: #14
RE: Heavy steering problems

Surely the rolling diameter of the wheels has to be the same whichever size of wheel is used, otherwise the speedometer accuracy goes out the window...

Mark

Evoque was great, now in an RRS SVR
17-10-2011 10:59pm
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LP
 

Posts: 218
Joined: Jan 2011
Location: London
Post: #15
Heavy steering problems

I dont think speedometers are very accurate. At least not compared to my tomtom. I thought this was one reason why the police turn a blind eye to people doing 10percent more than the limit. In my mini 77 on the speedo is 72 on the Tom Tom.
17-10-2011 11:05pm
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PhilSkill
 

Posts: 3,880
Joined: Jun 2011
Location: Warwickshire
Post: #16
RE: Heavy steering problems

(17-10-2011 11:05pm)LP Wrote:  I dont think speedometers are very accurate. At least not compared to my tomtom. I thought this was one reason why the police turn a blind eye to people doing 10percent more than the limit. In my mini 77 on the speedo is 72 on the Tom Tom.

Speedos are nominally set to read 4% fast to give a margin for error.

MY12 Fuji Dynamic SD4 Manual, Pano Roof, Electric Tailgate with own Close module
[Image: 124529.png][Image: 1004887.png]
17-10-2011 11:11pm
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berlin2011
 

Posts: 619
Joined: Jun 2011
Location: South Africa
Post: #17
RE: Heavy steering problems

Circumference of 19" 235/55 is 2,329mm and the 20" 245/45 is 2,290mm (rounded) so the difference in distance covered with each revolution of the wheel is ±39mm (more by 19") or 1.73%….. which considering that over the life of a tyre the tread reduction from new to the minimum legal depth (±20% of new) will have pretty much the same or slightly greater impact on the circumference and hence accuracy of speedometer I would not worry too much about this.

Current: SD4 Dynamic Auto, 5 Door, Orkney Grey with Black Contrast Pano roof and 20" Shadow Chrome wheels. Pursuit interior. [countdown="Hand over"]15th June 2013 2:00pm[/countdown]

Gone: Si4 Prestige Auto Coupe, Orkney Grey with Panoramic Roof, Element interior, Shadow Chrome 20" wheels with most of the bits & pieces loaded. [countdown="Hand over"]29th November 2011 2:00pm[/countdown]
17-10-2011 11:18pm
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Tekno
Banned

Posts: 109
Joined: Sep 2011
Location: Lincolnshire
Post: #18
RE: Heavy steering problems

PDI?
17-10-2011 11:31pm
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mark_n
 

Posts: 1,720
Joined: Jul 2011
Location: London
Post: #19
RE: Heavy steering problems

Pre-Delivery Inspection. The dealer is supposed to check the car and take it for a short test drive to ensure all is well.

Mark

Evoque was great, now in an RRS SVR
18-10-2011 05:28am
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Tekno
Banned

Posts: 109
Joined: Sep 2011
Location: Lincolnshire
Post: #20
RE: Heavy steering problems

I guess that's why mine had 28 miles on the clock and a CD in the player when I picked it up.
18-10-2011 08:46am
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