Hikers can anticipate mountain bikers climbing behind them because they are not much faster than walking on single track or steep road climbs, they can also hear the breathing and there's time for a friendly "on your left" or "can I pass when it's safe".
Ebikes travel much faster uphill and are silent, so hikers do not have any warning/anticipation especially on fire roads.
For descending, there's no difference. Hikers on multi-use trails know to expect bikers (or should, at this point) and bikers should be respectful when descending.
May 8, 2019, 1:03 p.m. - grambo
Hikers can anticipate mountain bikers climbing behind them because they are not much faster than walking on single track or steep road climbs, they can also hear the breathing and there's time for a friendly "on your left" or "can I pass when it's safe". Ebikes travel much faster uphill and are silent, so hikers do not have any warning/anticipation especially on fire roads. For descending, there's no difference. Hikers on multi-use trails know to expect bikers (or should, at this point) and bikers should be respectful when descending.