Go backwards on (Zwift) climbs w/ same W/kg?

That is still the case. Since racing (in particular) and fast group rides are mostly categorized by w/kg, it gives smaller people a disadvantage on any course with flat terrain. The zwift algorithms definitely give some preference to the smaller riders on the flats (compared to real life), but not enough to level the playing field. There is no way to use w/KG along to accurately categorize racing abilities. So, A races aren’t an issue because it’s open, but every category below that has a bias toward bigger people. The alternative is to make it more like real-life with results-based categories, but the w/KG is probably the best way to do it in an objective way. I think there are also some races now that also have weight in play for some categorization, but it’s still an arbitrary cutoff.

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