Originally Posted by machinist42

Thanks for posting of these. Late last night I spent some time researching and found this:

"Another cool thing about the Velocitas is the valve. Most wheels that people are using tubs on these days are deep section, but the majority of tyres don't have removable valve cores to add an extension. The Velocitas come supplied with a 60mm anodised extension that screws on directly to the tub and if you need to go longer for time trial wheels of 80-100mm deep, for instance, then you can buy longer ones separately."