So Eclipse isn't fast enough for him anymore?
Tubs, you all know what that means : probably 650c, so LARGER wheels
Frischi's getting there, a few mm's at a time. 650c's are 13mm larger in diameter than 26" as we know it on MTB's.
Other are already working on 700c tubulars of that kind, to further reduce rolling resistance and increase roll-over ability.
BTW, who can name those rims? How much brake power do they generate with V's in the rain?
In a recent Dutch XC race, Gerben de Knegt had 650c Dugast Racing Ralphs. He came from the back of the pack, into the lead...only to flat in the closing stages. That was on the smoothest of forest soils imaginable, with close to zero climbing/descending. Unfortunately, Gerben crashed badly in the TransAlp only weeks later, he's out for the coming months.
Funny, 650c Tubular technology has been here for decades. Now in the 29" age, with people trying 700c x 35mm Dugasts on mountainbikes (with discbrakes), all at once others have Dugast make 650c versions to keep up with rolling resistance.
Going from 26" to 29", reduces a tire's smooth surface rolling resistance by 10% (2-2,5w per wheel), at the cost of 300-400g total bike weight. Not worth it, you might say, if cornering, roll-over and endo factor wouldn't improve as dramatically also. Racers are only starting to find out now. Jelmer Pietersma rode his WW Nishiki Bigfoot 29" to a Dutch -23 Nationals title on very basic $9.99 WTB Nanoraptors. The competition was mainly on Racing Ralphs and 700c Dugasts.