Originally Posted by
deepakvrao
I know it's an old post, but what calipers with those 30mm wide rims? I just checked and neither SRAM nor Shimano go beyond 28?
Edit: I saw you answered that a few posts on.
I have the 56 in disc versions, and now want to buy in rim versions. 30mm will not fit my [current Sram - going to r8000] calipers. Would you suggest I go with the 46 deep 28mm wide, or the 55 deep 25mm wide?
I have the non series Campagnolo Skeleton, cost me $45~ back in 2017. I think any of the skeletons will open the same. I read dura aces will open too, so any shimano should. Specs dont match reality, brakes always open more than stated. As long as you can make the pads touch the rim without any angle its good.
As for rim choice, I got these based on Hambini's wind tunnel test (plus good reviews). I know the older 55 dont follow a similar profile and dont look as aero. The 46x28 look the same proportion, so between those two I'd get the 46.
Just remember that for a rim to be actually aero the tire has to be at the very least 5% narrower than the brake track when inflated. Better if 10%~. So on the 48x28 you install a 23mm and it will widen to 25~26 (the inner width is 21mm if I remember right). I know my gp25mm measure 29mm on and they are already a bit too wide for the 56s (that actually measure 30.4 if I remember right). Plus those 46 and 56 have inner bead hooks good for tubeless. This is more important to the front tire.
The inner width on the 55x25 rim is probably 17 so a 23mm tire should measure actually 23, but in case they are too wide you will be locked to old 22mm Conti Attacks. I wouldnt get those. 46 or 56.