Easier to get your tyres up to high pressures with Presta – not so important if you run low pressure tyres
How exactly?
Um … we’re getting well away from my areas of expertise here. It’s more “stuff I’ve read on the internet”.
As I understand it, it’s something to do with Schraders having a mechanical valves while Prestas use pressure, which makes it easier to pump when you are getting up to high pressures … or something.
Hang on …
Right, I’ve just had a quick look. According to cycling news:
Presta valves also perform better over time compared to Schrader valves, in that they hold air more effectively and don’t degrade as quickly. They can also hold higher pressures, which makes them a must for track cycling where tyre pressures typically exceed 120psi.
https://www.cyclingnews.com/features/schrader-vs-presta/
However, their conclusion to ‘which valve do I need?’ is: Check which valves you currently have on your bike, and buy the same one