"Chris Whelan" wrote in message
...
On Fri, 29 Jan 2010 22:46:39 +0000, Mrcheerful wrote:

[...]

even if the speedo reads correctly after fitting different wheels the
mileometer won't read right.

It won't read the same, but surely it may be closer to reality?


The mileometer is usually quite accurate because it is directly pulse or
cable driven, whereas the average analogue speedo has a flappy needle which
is safely adjusted to overread. so putting big wheels on will often make
the speedo closer but put the (previously accurate) mileometer out.