Bosch Purion speed calibration error

[Phil1701]

I have just recently acquired a Cube Stereo Hybrid with the Bosch CX drive and Purion control unit. However it seems that the displayed speed has an error about minus 1.2 mph when compared to my Garmin Edge Touring. I am assuming that the wheel circumference is set incorrectly but have no idea how to access and change this within the Bosch system settings. Any ideas guys or is it something only the dealer can sort?

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[Gubbins]

I have just recently acquired a Cube Stereo Hybrid with the Bosch CX drive and Purion control unit. However it seems that the displayed speed has an error about minus 1.2 mph when compared to my Garmin Edge Touring. I am assuming that the wheel circumference is set incorrectly but have no idea how to access and change this within the Bosch system settings. Any ideas guys or is it something only the dealer can sort?

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I have this issue and it's a bike thing not a purion thing as mine was out on both intuvia and purion. On intuvia you can alter the wheel size in small increments which makes the speedo apear to catch up but it doesn't as the bike cuts out at exactly the same real speed no matter what the display says.

 

[soundwave]

you cant change the wheel size with purion but you could with the old display and had a +- 5% that you could change for different size tyres.

a dealer can change this if it bugs you that much

 

[Phil1701]

Thanks for the advice guys.

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