Sunny SF-B1709 a cheaper Keiser M3i alternative? UNBOXING + first impressions review

Sunny SF-B1709: https://amzn.to/3hSIw6b ($130 discount)
This is not a Keiser M3i indoor bike, but the Sunny SF-B1709 sure has a lot in common with it. The super light 7.36 lb flywheel is very similar to the Keiser M3i flywheel weight of 8 lbs from what I could find in my research. Typically flywheel mass is a really important factor when buying a indoor cycling bike, but is flywheel weight actually as important as we think?


Wahoo Cadence Sensor: https://amzn.to/2UAas3V
Scosche Heart Rate Monitor: https://amzn.to/3kyGJ68
Clip in Pedals: https://amzn.to/36MsJ3B
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0:00 intro
2:47 components analysis
7:15 how to build
8:11 crank arm measurements
11:36 built, first impressions
13:43 geometry, comfort
14:51 flywheel feel
16:48 screen
18:16 handlebars
19:50 max resistance
21:33 HRM pulse compare
23:57 cadence and feel comments
26:17 final thoughts

I bought the Sunny SF-B1709 to review and compare to other bikes I have because it's so much different in many ways, and the Keiser M3i is a really well known, popular, and highly reviewed bike. In this video i give you my first impressions of this ultra light weight flywheel bike, what the maximum resistance is like, and how the drive train feels. I have linked the chapters of this video below so you can skim and jump around as you see fit.


I am supposed to be getting a keiser m3i gently used on the marketplace today. I hope the deal comes through so i can compare the keiser m3i head to head vs this bike and the peloton bike as well.