Originally Posted by
idiq
The Thomson X2 is a 31.8 with 2-bolt... great stem too, it's slightly stiffer than my WCS.
Thanks, now I will have to find a flat bar like I wanted because it will be my perfect setup.
Originally Posted by
rudetay
How fast do you need to change bars? It takes like five minutes to unscrew the four bolts in a stem faceplace, replace the bar, and screw them back in.
It's for my folder which is, coincidentally, single speed. It has a heavy split handlebar that basically detaches the two ends. I figure I can get a much lighter setup with standard components if I could only get a flat bar in carbon.
Originally Posted by
rudetay
Finally, I'm not sure about your QR bolt idea, it might be ok for flat bars but I wouldn't trust any kind of quick release on any other kind of bars, not to mention the contradiction of a lightweight stem with whatever kind of QR system you were looking at. A seat post has almost no twisting forces, and if it comes loose you won't be happy, but you also won't go smashing into the front of your bike and the ground. Take note of how many people run standard bolt seat post binders.
In addition, I wouldn't use any kind of QR device with anything carbon. The force you'll be putting on the bar (or seatpost) would be pretty random and hard to control, and especially if you're trying to switch them out fast you might run into over tightening or under tightening issues. The margin for error on carbon is much smaller than steel or aluminum.
As I said, this is for a folder. There are QR bolts all over the place (including on my 350mm maximally extended carbon seatpost) and I've not had a problem. Perhaps it helps to know that I weigh 125 pounds. If it breaks then I'll try something else, but given the fact that this bike already has a threaded quill over 1 foot long I don't anticipate the stem clamp as a likely point of failure.