I used to have 110mm long stem on my gravel bike. I've always been comfortable with it. Then I had an accident which broke and sprained some bones on my arms. I've kept on using the 110mm stem for a while but found no longer comfortable in longer rides. Due to arm injury, I'm finding myself unloading my arms more by engaging the core muscles. But doing this made me feel stretched on the bike so I replaced the 110mm stem with the shortest compatible stem available which is a 32mm stem.
The bike felt twitchy at first going from 110mm to 32mm stem and also adjusting the brake hoods upwards so the hoods is much closer to me than before. Steering effort felt much lighter. Everything felt less stable at first.
But after couple months, I got real used to it and now I think the short stem + short reach dropbar setup is actually more stable in fast descents.
When I had the longer 110mm stem and making fast descents in the mountains, if I disturb the handlebar a bit, the bike and handlebar would oscillate on its own, several times, and eventually stopping on its own without doing any corrective action. It is scary given you're going downhill at high speeds.
Now with the 32mm stem and the hoods in a closer position, if I disturb the handlebar while descending at high speed, the handlebar would almost immediately correct itself. If it oscillates, it does so in much less number of cycles than the 110mm stem. To me, this is a more stable, much safer behavior. There's even more advantages shorter stems present like improved handlebar stability when tackling long steep climbs at low speed.
I've watched GCN video comparing stem lengths on slalom courses and high speed descents. It seems they didn't really did all tests conceivable and didn't give themselves the chance to get used to using shorter stems.
The only potential disadvantage of really short stems is they look awkward on a road bike. They look perfect on a MTB but a bit ugly with road bikes.
The bike felt twitchy at first going from 110mm to 32mm stem and also adjusting the brake hoods upwards so the hoods is much closer to me than before. Steering effort felt much lighter. Everything felt less stable at first.
But after couple months, I got real used to it and now I think the short stem + short reach dropbar setup is actually more stable in fast descents.
When I had the longer 110mm stem and making fast descents in the mountains, if I disturb the handlebar a bit, the bike and handlebar would oscillate on its own, several times, and eventually stopping on its own without doing any corrective action. It is scary given you're going downhill at high speeds.
Now with the 32mm stem and the hoods in a closer position, if I disturb the handlebar while descending at high speed, the handlebar would almost immediately correct itself. If it oscillates, it does so in much less number of cycles than the 110mm stem. To me, this is a more stable, much safer behavior. There's even more advantages shorter stems present like improved handlebar stability when tackling long steep climbs at low speed.
I've watched GCN video comparing stem lengths on slalom courses and high speed descents. It seems they didn't really did all tests conceivable and didn't give themselves the chance to get used to using shorter stems.
The only potential disadvantage of really short stems is they look awkward on a road bike. They look perfect on a MTB but a bit ugly with road bikes.