does anyone want to explain the concept of threads per inch to the OP, or shall we just leave it alone?
... you're not a hipster. But you definitely have hipster tendencies. Stay vigilant... like diabetes, you can manage this.
This thread sucks -Quattro Krant
2008 Passat wagon, 2.0T 6MT with mods
- 2013 Cannondale CAADX-6
- 2010 Specialized Secteur Elite
- 2009 Specialized Rockhopper Comp 29-er
I didn't know that the Presta valve thing was a religion.
2007 E90 AW 323i Step | Lowered 1.25"/1" | BMW Performance Exhaust | PBX | Debadged | Scangauge II | Style 162 18" & 161 17" wheels & rear 15mm spacers
Besides the issues with structural integrity that people have brought up, there is one other issue you might have. Valve stem length... I'm not sure what kind of profile rims you have but most modern road wheels have a deeper profile than the Schrader valve stem length. Just a heads up, you might end up with something that looks like this:
Long answer: You're probably screwed on pinches, since they're usually big holes with rapid loss of pressure. The sealant can't keep up. Small punctures you'll probably be okay. I ran Stan's in the tubes on my CX bike when I lived in Utah because of all the goat heads and had good luck with it sealing those holes up. The punctures were so small and the pressure so low that the tube didn't tear at all, it just got tiny pin pricks.
Questions, not answers: Are your Doublewides tubeless? Did you use a Stan's kit to convert them if not? Were you using a compressor to seat the beads or trying to do it with a floor pump? Did you lube up the beads with soapy water before trying to seat them? Are your tires tubeless? Did you put a metric asston of sealant in there if not?
To answer the original question - high end bikes do not come with flat resistant tubes because they are heavy and will still flat. On a test ride the bike with flat resistant tubes will feel sluggish and hard to get up to speed, vs company B's bike that is nimble and quick to accelerate. They also cost a little more and add zero value to the bike. It doesn't matter much on one bike, but scale it up and it will start to show.
As far as tires, the bike companies will put the cheapest thing they can on there to sell it because that should be the last thing that makes the decision for you on anything >$1k, and tires are largely personal preference. Most of the people serious about riding will take off the house brand tires that came on the bike and throw on a performance set.
Presta valves are for high pressures and lock by tightening the top of the valve. Mechanically this was determined to be the better valve type and thus was adopted by the industry as the standard for high performance wheels. By drilling out your rims you void the warranty on your month old wheels. If you spent a grand on a bike, go ahead and spring for a $40 pump.
Flats are a part of cycling. The flat you got from glass is purely chance. I have gone a year with 1 flat and a week with 3 flats. One of the rules of cycling is to keep a spare with you. Be sure to avoid the pinch flats by topping off your tires before every couple rides. Your tubes will lose a few PSI each week due to rubber being a naturally porous material. Do not use CO2 to inflate unless you are stuck on the side of the road. The CO2 will leak from the tube over the course of a week or so until the tire seems completely flat again. If you use CO2 on the road changing tubes, air down the tire when you get home and pump it with your regular pump. Compressors are OK, but check that the tire is completely seated on the rim, because if that tube explodes in your face you may have to change your pants.
With 23mm tyres, you want to top up before every ride as there isn't much air in them to begin with.
If I pump up mine to 120psi in the morning, they are down to 80-90 by the next day.
Lighten up people.
Yes, you can drill additional, much larger holes in your rims, it's been done lots of times in the "fat bike" community with no ill effects. It's been found to be structurally sound, and reviewed by more engineers than the number of PE Stamps in your typical PE's desk. (Edit: I am a Mech E. as well)
Gratuitous road bike trials video of a good buddy to lighten the mood.