Bosch performance CX ratio

[Fish2]

Hi.

I am looking at a Cube bike with Bosch performance CX drive unit and would like to calculate driving speeds for different gears and cadence.

The problem is I can not find out what the ratio between pedal RPM and sprocket RPM for Bosch CX drive is?

Thank you for any info!

 

[Artstu]

2,5 is the ratio, so a 16 tooth sprocket gives in effect a 40 tooth front sprocket.

 

[Fish2]

Great! I could not find this anywhere! Thank you!

Glad to see I will not have to pedal like crazy to go 20mph.