Clears the tubes to remove the tire, yes, but they don't open past the tubes so you can't easily clean the pad surface or change them for that matter. I forget that many riders today may consider that normal as they've never seen anything different. Canti brake pad mounts were originally always offset and even had road sized pads and thus fully opened for pad cleaning and replacing. Later on, someone thought it was good idea to elongate the pads so they'd no longer clear the tubes. Then another thought it was a good idea to have the pad mounts inline with the arm. A third genius then came up with thinline pads to attempt to cover up the other two errors. This trio of errors never made a better brake. The bottom line is brakes pads don't
have to hit the tubes, and the pads don't
have to be long. Those are conscious design choices that in the real wolrd of riding doesn't make for a better brake, and that's one of the things the Silver brakes are addressing.
I suppose some will say, yes, but Paul Cantis or V's are great, so that justifies it. No it doesn't. That the brakes work well enough doesn't mean another design doesn't work just as well. I suspect CNC machining limitations may have more to do with their design than anything else. We'll never know because apparently they sell and Paul has no reason to redesign it. Suntour XC Pro cantis, for example, are astoundingly good rwith offset pad mounts and road sized pads. But Suntour didn't last so it's a terrific brake few know about and wil ever experience. The Silver brakes are just Riv's way of returning a feature that should have never been overlooked to begin with.