Originally Posted by JohnJ80

Some comments -

1. I don't want a touring bike. I want a performance bike that I can use for uber light credit card touring on occasion.

2. Interesing that you got it down to 1.5lbs additional, but I still think that is too much. I really don't want to go backwards on weight. I do presume that at some point disc bikes will converge with the weight of current rim brake bikes. That's when I'll probably be willing to do go this route. Until then, no - for a variety of personal reasons. This is frustrating for me because I do need to make a wheel purchase so I can ride a wider pair of tubeless clincher tires (most of my bikes are on tubulars) in the 30mm range. Given I don't care for my current canti/v-brake framed bike, this wheel choice holds the whole thing up.

3. Yes, I'm well aware of the tradeoffs of frame design with respect to disc and rim brakes. I have built a number of bikes over the years, I am an engineer, and I have had lengthy discussion with frame builders on the performance specs I'm looking for.

4. I try and avoid riding in the wet (it's a thing with me, I don't like it) so there really is little difference in braking in my application. Or, if there is, it's within margins. I grant you that in the wet, there is a difference, otherwise not so much.

5. With two of the frame builders I have discussed, I have already used them to design other rim brake bikes that I currently own. Using those designs as a starting point was the basis of the lengthy discussions on this topic.

6. Yes, I've found it possible to get weight reductions on disc brake bikes as well however I wasn't happy with some of the component choices (gets to be a fairly narrow set of components) to get there. All said, it's still in the range of too much weight penalty for my interest (among a couple of other things). Looking more like I'll have to wait a couple of more years or so.

J.