Jag hade nog inte läst in allt för mycket på den där sajten....
Verkar vara någon form av autogenererad klick-farm för annonserna på sidan.
Går du till "Home" så pratar de om fiskar...
Det sista stämmer inte alls, 30-32T är inte ovanligt när det pratas berg och mindre än 25T tror jag nog inte att någon kör med längre.
De verkar ha kopierat informationen härifrån:
https://ridefar.info/bike/components/gear-ratios/#Low_Gear_Ra...
Den ser i mina ögon däremot väldigt seriös ut, här är texten direkt efterföljande citatet jag postade:
"There are useful tools for turning speed into cadence when using a certain gear ratio here and here. They show that the cadence when riding at 7 km/h with this gearing would be 52 rpm, which is worryingly low. If the rider wants to maintain a more comfortable cadence of 60 rpm on such a climb then the chainrings, cassette or both should be changed to have a lowest ratio of no more than 0.92:1.
This result of needing a 0.92:1 gear ratio only applies to this one specific example and the values that I’ve assumed. Being able to sustain 200 watts (or 800 vertical m/h) even when fatigued and having a total weight with bike and equipment of 85 kg are rough values and may be over-estimates for typical ultra-distance cyclists. In addition, I assumed a tire size of 700C x 25mm. Tire diameters from as small as 650B x 35mm up to 700C x 40mm are common but wouldn’t change the result by more than about +/-2 rpm. To keep things simpler, I only present gear ratios on this page and ignore the very minor effect of tire size, but you can include this when doing your own calculations.
Having an even lower gear ratio than 0.92:1 may therefore be advisable for many people. Personally, I prefer to have a lowest gear ratio of around 0.83:1 when doing ultra-distance rides and I also appreciate having that gear available on local shorter, hilly rides.
To summarize, the lowest ratio needed for most people when doing typical self-supported, ultra-distance cycling events will be somewhere in the range from 0.8:1 to 1.0:1. Subsequent sections address the options of how to obtain such gearing, but I first need to address what total gear range is needed by assessing what are the fastest gears that are likely to be needed for this type of cycling."
Inte helt applicerbart på min situation, men postade för att ge en kontext till citatet.