You said it yourself, better presure. Also I have two bikes, and I would like to kind of standardize the stuff on both bikes as much as possible. That way when I put a long ride bag together I can have ONE extra tube that will work on both bikes.I have both, and other than the presta valves hold pressure better, why would you want to?? Granted I have an air compressor in the garage and I check tire pressure before every ride, so that isn't as big of a deal for me. I end up having to use an adapter to get air in them with a presta valve.
Presta is easier to get air into than Schrader--that is if you are using a bicycle pump. If you are relying on finding a gas station, then yes, Schrader is better.I just hate the pain of getting air in the presta.
One of the many advantages of Presta is that the smaller hole makes a stronger wheel. By drilling it out, you weaken the wheel.If you travel far from home, you might want to consider tube availability in deciding on Schrader vs Presta valves.
My favorite bike came with 26 in wheels drilled for Presta valves. If I'm in a rural area on a weekend and need a tube, that combination just isn't available in a typical Walmart or Target store. I had the wheels drilled for Schrader valves. Now, I can use either valve type in an emergency.
That's why I added the edit about checking with the manufacturer before enlarging the hole. It looks like the edit went thru just minutes before your post.One of the many advantages of Presta is that the smaller hole makes a stronger wheel. By drilling it out, you weaken the wheel.
I always carry a spare tube and patch kit. If the tube on the bike fails in a way that cannot be patched, e.g. with a valve failure or a blowout, the spare goes on, and I'm without a spare. I'm in trouble if that new tube also fails in a way that can not be patched. It is very comforting (to me at least)to be able to get another spare easily. In many of the rural areas in which I ride, the only place to buy tubes may be a big box store. The ones I've been in do not typically carry 26 inch Presta tubes.Why not just carry a spare tube and/or a patch kit?
Almost all the time I am adding air its at home. At home I have an air compressor so I guess my gas station is in the garage. I still carry both a co 2 inflator and a mini pump. I still find the schrader valve easier to get air in, but I don't have a desire to change wheels or drill them out. I just live with the extra time, carry and extra adapter as well though I think both the mini pump and co2 inflator will take presta. I guess I could buy an inflator for the air compressor for the presta, but Id rather spend the money elsewhere.Presta is easier to get air into than Schrader--that is if you are using a bicycle pump. If you are relying on finding a gas station, then yes, Schrader is better.
What do you do if you flat off road or if you are no where near a gas station? Wouldn't it be easier to just carry a mini pump or CO2 inflator?