Tubs

I'm still not 100% convinced by tubs, even the tour riders are switching to clinchers for downhill sections cause of the heat/glue/rolling tire problems.

Anyway, my clinchers run happy over 10 bar (run them at 150 psi) and only weight about 180g so about 240g with a standard tube. My tubs run at 170psi and weigh about 220g each + about 60g of glue, and don't feel any different really.

I appreciate what you're saying, but I have thousands of miles on tubs and have never seen any issues with rolling - I get some reasonable speeds on the mountains myself - downhill, before Andy pitches up again.

In fact, the only tyre issues I've seen on a mountain were a clincher blowing out due to excess heat on the sidewalls and a mate bust a Corima (clincher) on a descent on the Etape one year, which lead Corima to state that their wheels aren't recommended for downhills.

IMHO, a tub rim is an easier design to get right, certainly in carbon.