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    NewsGame Updates

    Zwift Update 1.0.29337 Released

    Eric Schlange
    By Eric Schlange
    August 28, 2018
    1

    Zwift released a minor update last night, with one especially interesting change which I think is worth discussing. Game Master Jon Mayfield said this:

    Zwift now sends the riders weight to ANT+ FE-C smart trainers. This may enhance how the trainer feels.

    Let’s give this a little thought: according to bikecalculator.com, if you weigh 50kg and want to hold 15kph up an 8% grade, you will need to sustain ~235 watts of power. But if you throw on a 25kg backpack and hit that same grade, you’ll need to hold ~325 watts to maintain 15kph.

    So (obviously) resistance increases on climbs as you get heavier.

    But here’s a little-known fact about Zwift prior to this week’s update: rider weight wasn’t being passed via ANT+, but it was being passed if you used Bluetooth for your smart trainer connection. So two riders of vastly different weights felt the same resistance when they hit the same climb (if they were using ANT+ trainer connections) while the same two riders would feel very different levels of resistance if they were using Bluetooth.

    I talked to Jon Mayfield about this, and he said his FE-C testing a few years ago showed that passing weight didn’t seem to effect the resistance at all, and sometimes even caused some data errors–so Zwift left it out until things could get straightened out. Makes sense.

    Does it really matter? Probably not a lot, but I do think this will increase the feeling of realism between indoors and out, provided your run your trainer difficulty at 100% and have a trainer that can replicate the full gradients found in Zwift.

    Here’s Shane Miller talking about gradient simulation more, in case all this has just confused you:

    Other changes in this version include:

    • Gave the event paddock chat messages a fresh coat of paint to be more legible
    • If you receive a Ride On from somebody nearby, a Ride On button will appear next to their name in the Riders Nearby list so you can easily give them one in return
    • Fixed missing Zwift Academy glasses on some platforms
    • More polished art on the Innsbruck course
    • 3 Run 13.1 training plan enhanced with more messages and fine tuning of training
    • Various other fixes and improvements

    See full update notes >

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      Eric Schlange
      Eric Schlangehttp://www.zwiftinsider.com
      Eric runs Zwift Insider in his spare time when he isn't on the bike or managing various business interests. He lives in Northern California with his beautiful wife, two kids and dog. Follow on Strava

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      SuLiangwen
      SuLiangwen
      6 months ago

      Hi! I am a fitness bike development engineer. I’m a little confused about the “slope” in the upper right corner of the screen. When I observe a “slope” of -3, I receive a parameter of Wind Speed = 0  Grade value = -111  crr = 40  crw = 51  When I observe a “slope” of -4, I receive a parameter of Wind Speed = 0  Grade value = -144  crr = 40  crw = 51  I like to realize that the device supports the tilt function,So I need to get the slope parameter,Where can we get the right relationship between… Read more »

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