Sigma Sport SPEEDMASTER Bicycle Computer setup problems


New Member
Sep 5, 2004
I have a Sigma Sport SPEEDMASTER 7 (7000) Bicycle Computer with wireless kit.

I compared the readings with my friends computer and my readings are far too high :-

My friends trip read 12.09 miles mine as 19.48 miles
My friends average read 11.8mph mine as as 19.80mph
My friends maximum speed read 33.2 mine 162.1 mph !!!

My tyres are 700*23 and I have set the wheel cirumference as 2096.

The instruction booklet is not very clear.

Can anyone shed some light on this please ?