Hi, im 35 years old and obese(current weight 267) and recently have noticed while doing my workout that my heart rate has gone from being usually in the 150s to 165 to 170s- high 180s. I have anxiety about my heart health and the first time i saw this i got scare and maybe this might have caused my heart rate to get higher. Back in 2016 I got 24hr holter, ekgs, echo test stress test done and everything came back normal because i had a huge panic attack and have been fearful about my heart ever since. My heart races while working out but once i stop y workout my hr does come down fast. Is this because im obese and out of shape or something wrong happening w/ my heart alll of a sudden.
Even though Shimano say it isn't within spec, could one use a triple 40/30/20 with a 11-36 or 11-42 cassette? What front and rear derailleur would one use? That would provide a range from 0.55 to 3.3 or 5.2 to 3.3, would that be suitable for a 29er wheel? As with any triple you'd be mad to use the extremes, ie, lowest chainwheel with highest cassette and visa versa. Are these components actually available?