Tyres and speedos

Submitted: Thursday, Jun 19, 2008 at 20:15

ThreadID: 59002 Views:2550 Replies:5 FollowUps:2

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G&K

Thanks for the feedback re my last post on suspension upgrades. V Useful and now have that sorted.

On to the next bit.

To achieve a little more clearance by using larger tyres am I missing something?

The new circumference of my tyres will affect the reading my speedo provides - yes?

I am now locked into mental arithmetic every time I drive or can I reset the instuments to read accurately?

Thanks in advance
G&K

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Reply By: Member - Longtooth (SA) - Thursday, Jun 19, 2008 at 21:25

Thursday, Jun 19, 2008 at 21:25

Marks Adapters in Melbourne have either electronic or mechanical adapters to fix this problem. This fix makes the speedo extremely accurate for any size tyre. Look at the website for more info. Fixed my error due to tyre size change and is cheaper than getting pinged for a momentary indiscretion.

AnswerID: 311049

Reply By: Member - Gareth P (VIC) - Thursday, Jun 19, 2008 at 22:36

Thursday, Jun 19, 2008 at 22:36

The marks adaptors controller is great. Cost about $200 for my GU, but I can set it for my everyday tyres 33" and my weekend tyres 35". Worth the money and easy to install

AnswerID: 311078

Reply By: Member - Royce- Thursday, Jun 19, 2008 at 22:59

Thursday, Jun 19, 2008 at 22:59

My 33"s make the speedo read 4% over..... I just have the Navman set on speed and have satellite technology watch my speed. It's very accurate as backed up by those speed monitor overhead signs.

AnswerID: 311090

Follow Up By: Member - Howard (ACT) - Friday, Jun 20, 2008 at 09:01

Friday, Jun 20, 2008 at 09:01

Agree with Royce , let the GPS do it for you.

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Follow Up By: Member - Bucky (VIC) - Saturday, Jun 21, 2008 at 09:40

Saturday, Jun 21, 2008 at 09:40

Good call Royce

Cheers

Bucky

FollowupID: 577382

Reply By: G&K - Saturday, Jun 21, 2008 at 13:56

Saturday, Jun 21, 2008 at 13:56

Thanks everyone. Both simple affordable solutions. As last time excellent response from poeople who know what's going on.

AnswerID: 311439

Reply By: Member - Olcoolone (S.A) - Sunday, Jun 22, 2008 at 11:34

Sunday, Jun 22, 2008 at 11:34

I would check your speed before worrying to much.

We went 40mm taller in tyres and it made our speedo read correct.

Most vehicles will show faster on the speedo then what you are traveling at.

Ask the police to do a speed check are find someone with a GPS are check your speed with the bigger tyres.

How much bigger are the new tyres to the old ones.

Regards Richard

AnswerID: 311600