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 Posted: Thu Dec 22, 2011 1:07 pm |
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Joined: Jan 28, 2011
Posts: 536
Trade Rating: +5
Location: scunthorpe
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Last month i decided to change my alloys to some aftermarket ones, so my standard wheels were 195/50/r15, and so i bought some wheels that was close to them 195/55/r15 and i have noticed that my speedo has become about 5 mph out. i know that changing the size can alter it but all ive changed is the width, what could have cause the speedo to become wrong?
Thanks All
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| Citroen DS3
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Posted: Thu Dec 22, 2011 1:18 pm |
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Joined: Nov 28, 2011
Posts: 411
Trade Rating: +1
Location: sunny stoke
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All speedos will be out, 3mph is the normal
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Posted: Thu Dec 22, 2011 1:33 pm |
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Joined: Jan 28, 2011
Posts: 536
Trade Rating: +5
Location: scunthorpe
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i understand that most speedos are out anyway and at higher speeds they get worse, but it used to be pretty accurate, its only after i changed the wheels the speedo went out.
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| Citroen DS3
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1.6 VTI | |
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Posted: Thu Dec 22, 2011 1:40 pm |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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Different radius and circumference affects the speedo
Fit 205/40/17 or 185/60/14 and your speedo will be accurate.
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Posted: Thu Dec 22, 2011 2:18 pm |
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Joined: Jan 29, 2011
Posts: 6526
Trade Rating: +10
Location: Westhoughton, Lancashire
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Posted: Thu Dec 22, 2011 2:30 pm |
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Joined: Jan 28, 2011
Posts: 536
Trade Rating: +5
Location: scunthorpe
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My tom Tom but I'm not sure how accurate they are
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| Citroen DS3
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1.6 VTI | |
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Posted: Thu Dec 22, 2011 2:31 pm |
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Joined: Nov 27, 2010
Posts: 11520
Trade Rating: +10
Location: What's it to you? ? ?
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| puggy206 wrote: |
| My tom Tom but I'm not sure how accurate they are |
A lot more accurate then the 206 speedo.
Tom tom will be using GPS.
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| Toyota C-HR GR Sport 2.0 Hybrid with JBL & Alcantara packs. | |
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Posted: Thu Dec 22, 2011 2:34 pm |
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Joined: Jan 28, 2011
Posts: 536
Trade Rating: +5
Location: scunthorpe
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oh well in a way its on the good side of beiong wrong (saying im doing 40 when im doing 35) means im less likely to get a ticket... more likely to p**s other drivers off though haha
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| Citroen DS3
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Posted: Thu Dec 22, 2011 2:53 pm |
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Joined: Jan 05, 2011
Posts: 2985
Trade Rating: +36
Location: North Manchester
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Mine is out about 4mph but when you consider the price to get it sorted you soon get used to it.
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Posted: Thu Dec 22, 2011 5:38 pm |
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Joined: Jun 24, 2010
Posts: 10
Trade Rating: 0
Location: South Wales
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remember there is a short delay in readings from sat navs plus with 3-4 mph speedo's are likely to be out best bet is to find somewhere we're there are laser speedos which give a speed reading we have them around here the others pug is about 3mph so your reading isnt to bad. And your right with it being out by 5 mph very rare you will get yourself a speeding ticket. Getting your alloys might save you money in the long term lol
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Posted: Thu Dec 22, 2011 6:19 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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mine was spot on with 195/55/15 tyre
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Posted: Thu Dec 22, 2011 9:49 pm |
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Joined: Mar 29, 2010
Posts: 3977
Trade Rating: +15
Location: Halifax
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I don't have a speedo at all I know how fast I am going by the RPM 
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Posted: Fri Dec 23, 2011 10:09 am |
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Joined: Mar 27, 2010
Posts: 3017
Trade Rating: 0
Location: Running from Ant and Lee and Adam...........
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| Rob2859 wrote: |
| I don't have a speedo at all I know how fast I am going by the RPM |
That has the same issue as the speedo..
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Posted: Sat Dec 24, 2011 6:31 pm |
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Joined: Mar 29, 2010
Posts: 3977
Trade Rating: +15
Location: Halifax
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| Ash wrote: |
| Rob2859 wrote: |
| I don't have a speedo at all I know how fast I am going by the RPM |
That has the same issue as the speedo.. |
Yes I know I was just saying. Also there is a very easy and free way to adjust your speedo nobody has mentioned yet 
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Posted: Mon Dec 26, 2011 6:33 pm |
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Joined: Mar 27, 2010
Posts: 3017
Trade Rating: 0
Location: Running from Ant and Lee and Adam...........
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| Rob2859 wrote: |
| Ash wrote: |
| Rob2859 wrote: |
| I don't have a speedo at all I know how fast I am going by the RPM |
That has the same issue as the speedo.. |
Yes I know I was just saying. Also there is a very easy and free way to adjust your speedo nobody has mentioned yet |
If you mean taking off the needle and moving it, it won't work either as the amount of miles per hour that is out is a percentage so it varies with speed. Non linear..
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