# Wattbike Atom - Zwift power / heart rate mismatch

**URL:** <https://forums.zwift.com/t/wattbike-atom-zwift-power-heart-rate-mismatch/560157>\
**Category:** Bugs and Support\
**Created:** [October 27, 2021, 11:04am UTC](https://forums.zwift.com/t/wattbike-atom-zwift-power-heart-rate-mismatch/560157 "2021-10-27T11:04:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Johnny\_Plectrum\_CCC](https://sea2.discourse-cdn.com/gozwift/user_avatar/forums.zwift.com/johnny_plectrum_ccc/32/374442_2.png) [@Johnny\_Plectrum\_CCC](https://forums.zwift.com/u/Johnny_Plectrum_CCC)\
**Post date:** [October 27, 2021, 11:04am UTC](https://forums.zwift.com/t/wattbike-atom-zwift-power-heart-rate-mismatch/560157/1 "2021-10-27T11:04:55Z")

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More of a question / observation than a bug - I think.

Riding at 145bpm, 85 rpm my Wattbike Pro registers typically 250w.  
Riding at 145bpm, 85 rpm my Wattbike Atom 1st gen registers typically 250w.  
Today I did a 20 minute 150bpm test at 260w average.

Climbing Alpe du Zwift on my Atom my segments are typically 150bpm and 210w.  
If I analyse a segment generally there’s a ramp up in power from the ‘flatter’ start and then 225w typical thus producing a 210w typical average.  
I would expect the constant sections of the climb at 150bpm to therefore be 260w not 225w.

Am I missing something?