Jump to content

Tyre speedo matching (Again?)

Recommended Posts

Hi can someone tell me what will happen to the spedo reading on a 1993 Defender 200 TDi 90, which has had new wheels and tyres fitted- 265/65x16, will the reading be higher or lower. I have read various threads on various forums and it appears that every thread gives the opposite info to the last one, so I am a little confused(this seems to be a permanent state at present, must be part of the joys of 90 ownwership) , so any help will be much appreciated.

Hope Springs.

Link to comment
Share on other sites

If you fit bigger tyres than original the speedo will read slow - you're going further for each revolution of the wheel

If you fit smaller tyres than original the speedo will read fast - you're going less far for each revolution of the wheel

Obviously this is only with regard to overal diameter, width has no part to play and you could change both rim(16" to 15" say) and tyre size, causing more or less of a difference.

With regards to being 'correct', you really need to test the speedo against a GPS, My speedo reads more correctly on 255/85R16 than it did on the 205/80R16 it left the factory on.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy