My IVA story

[alga]

Originally Posted by metal matt

So this was my first fail the speedo was bang on at 35, 40 and 50 but 1 mph over at 60 and 70. A bit gutted but that is going to be the hardest to sort out with being able to check.

Have you considered mounting rear tyres that are slightly bigger for the test?
The change in readings will be easy to calculate from the tyre dimensions.

[Ianr]

Having read the Locost entry you need slightly smaller wheel for the speedo to read correctly. What size tyres do you have fitted? I have 195/45 x 15 which gets my speedo (same as yours) reading optimistically. If you have bigger size fitted you could borrow mine for the test but getting them to you may be an issue

[metal matt]

Cheers guys
The size of my wheels are 205 50 16 but that is the smallest size wheel I can get over my hubs and I did think about buying thinner wall tyres but decided not to. I have a spare cluster and I took that apart on the weekend and it is easy to move the dial around on the speedo to read the correct speed. The one that I am struggling is with the headlight beam pattern. It looks like I might need t9o buy some new lenses.

https://www.flickr.com/photos/124541083@N02/
https://haynes.co.uk/forums/showthre...=13262&page=15