Otis Posted January 30, 2022 Share Posted January 30, 2022 I'm running a larger tire size on my 2010 FG mk1 and have found that the speedo is reading 100 when i'm actually doing 105, i've noticed it is also at other speeds as well. I've worked out that the difference in rolling diameter is 5.1% or 32mm larger than the stock sizing. Would anyone be able to help with with fixing the reading issues on the speedometer or point me in the right direction? Many thanks. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted January 30, 2022 Share Posted January 30, 2022 Type tyre size into the pcmtec search bar. I haven't changed it to see if it actually works but it seems like a good place to start. Quote Link to comment Share on other sites More sharing options...
Bill Posted January 30, 2022 Share Posted January 30, 2022 Have a read here Quote Link to comment Share on other sites More sharing options...
Otis Posted January 30, 2022 Author Share Posted January 30, 2022 Thank you all for your info! It was very helpful and have figured it out! Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted January 30, 2022 Share Posted January 30, 2022 What did you change? Quote Link to comment Share on other sites More sharing options...
Otis Posted January 30, 2022 Author Share Posted January 30, 2022 18 minutes ago, Puffwagon said: What did you change? Changed Tyre_Size by doing minus 5% off the total value Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted January 30, 2022 Share Posted January 30, 2022 And it changed the speedo readout? Quote Link to comment Share on other sites More sharing options...
Otis Posted January 30, 2022 Author Share Posted January 30, 2022 28 minutes ago, Puffwagon said: And it changed the speedo readout? Yeah, speedo is no longer out for me 1 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.