speedo about 20% out?

[xCoupexAshx]

hey there my speedos out wat seems to be about 20% or so. ie if it reads 25mph ur doin 30mph, if it reads 60mph ur doin just over 70mph. makin speed cameras a right **** to go through lol

anyone heard this prob before? i cnt seem to find out wat it might be. garage is lookin at it tues n reckon it could be the gearbox sensor. any help would be much appliged.

btw its a 98 a3 1.8t, completely standard. ta

 

[Sandip]

What wheels and tyres are you running? Could be that the overall rolling circumference is out

 

[xCoupexAshx]

standard 16" 5 spoke audi alloys, not sure of the tyre size off top me head

 

[Sandip]

Just have a quick check to see if your tyres are 205 55 16

 

[Nilz]

Sounds like you may have the wrong tyre size on, which will knock your speedo out....