GU speedo

Submitted: Monday, May 16, 2005 at 23:31

ThreadID: 23047 Views:1773 Replies:6 FollowUps:3

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govo

Hi all...while traveling home from a weekend camping trip i had a mate with me who had a up market GPS and as i always curious as to how much the mt's 285x75 affected the speedo reading,l asked him to do a speedo check for me while doing 100klph..and guess what ..the speedo was spot on .It must have been a bit out with the standard tires on.

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Reply By: Member - Ross H (QLD) - Monday, May 16, 2005 at 23:36

Monday, May 16, 2005 at 23:36

Hi gavo
what was standard ie size

AnswerID: 111555

Follow Up By: govo - Monday, May 16, 2005 at 23:40

Monday, May 16, 2005 at 23:40

Standard size was 265x70

FollowupID: 367901

Reply By: Member - Ross H (QLD) - Monday, May 16, 2005 at 23:49

Monday, May 16, 2005 at 23:49

I went up from 70 to 75 and mine was about ten % out before the change and now reads about 3km on the bad side of good. I put goodyear atr's on so far so good

regards ross

AnswerID: 111559

Reply By: Member - TonyG (Qld) - Tuesday, May 17, 2005 at 08:34

Tuesday, May 17, 2005 at 08:34

Hi All,

I have a 3.0ltr diesel ST model which came supplied with 265/70 R16 Bridgestones.

When i did a speedo check against the GPS, I found that when the GPS is reading 100kph, the speedo is showing approx 110 kph.

As said above, it is approx 10% out.

I have been told that the speedo ratio is designed for the petrol vehicle, which comes with bigger tyres.

This is rather annoying, as my mileage will show that the vehicle has travelled 10% further than it actually has. Not good for resale vale.

Thanks

TonyG

AnswerID: 111577

Follow Up By: Member - Troopytrek - Tuesday, May 17, 2005 at 08:47

Tuesday, May 17, 2005 at 08:47

G'Day TonyG'
We have a friend of ours who has a hyundai 4x4 who recently did a trip to Melbourne . On leaving Melbourne coming home he said there is a bridge with a digital speedo check device on it. He found there to be 5 km difference and after his research found that this is a factory setting to ensure that you are not speeding. Not sure if nisssan do this to!!!!

Troopytrek!!!

FollowupID: 367935

Reply By: Tim (vic) - Tuesday, May 17, 2005 at 11:02

Tuesday, May 17, 2005 at 11:02

Hi Govo
I have a 3.0 patrol and with std 70`s tyres my speedo is out 8 km/h but when i put on my 75`s it is spot on, as i tested with my gps aswell

Tim

AnswerID: 111591