MECHANICS: Better Virtual Gear Modeling
Love virtual gear and had some discussion on this before and it generally works. However, the realism of virtual gear doesn't correlate to real gear shifting, for example in real gear I can do one shift (which might jump one or two teeth in a cog), but in virtual gear I might need to +/-3 (or more) to get similar resistance. Hence for pacing or TT, current virtual gear is ok but in a sprint, I still need to resort to physical gears so I can do a gear dump.
Can we do a better modeling of the gears so each +/- 1 virtual gear feels closer to a physical gear? In theory it is a lot of just data collection of someone riding around the velodrome with no wind and recording the power at a set speed and cadence at a specific physical gear then find the equivalent virtual gear that generate the same power at the same speed and cadence.
Jarvis
shared this idea
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Mike Ludwig commented
Please allow the user to more accurately model the virtual gear combinations they actually ride outdoors. I have no idea what measure of change to expect when shifting virtual gears, causing me to do multiple shifts. If it is a % of the actual chainring/rear cog tooth ratio (or crank rpm vs. trainer axle rpm), then please present a line in the "number of gears" selection page that lists the equivalent gear-inches for a user-selected wheel-tire size (i.e. 700c or 29er, etc). I could then select what rear cog size I want to get a desired gear-inch range. Let me ride (or nearly) what I ride outside.
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Barry Gaunt commented
"It should be easy and straightforward" said with a wave of the hand... :)
Perhaps it would be enough as a start to just emulate a change in chainring size? So if one had a physical chainring of 34t, say, a virtual shift range of 20t(2t)48t could be emulated. Would be easier than trying to emulate all the different cassette capacities (no. of cogs) and their size ranges (11t-28t, 10t-40t et.c).
(Not to speak of all the diffent wheel circumferences.)
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Andy
commented
I agree, it can take 10-20 seconds to change 6 virtual gears, this is far too slow and makes racing practically impossible,. In a race I was in yesterday I went from 90 rpm to 40 rpm when we hit the hill and it took over 20 seconds to get to the lowest possible virtual gears, by this time I was dropped
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Jarvis
commented
Once data collection of physical gear to virtual gear is done, it opens up the opportunity for "auto calibration" regardless of which physical gear you are in. It can create the model of what flat road should be and therefore when someone is spinning at the start before an event or right at the start it can compare that to the flat model generated and change the multiplier such that the rider resistance, and power matches the model. This auto calibration and take it effect each time there is a "flat" section
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Marc
commented
Maybe TPV can do this today, but the set-up gearing is confusing to me. All I want to do is exactly emulate my Shimano GRX gearing. It should be easy and straightforward. Help me, please