The results of German urologist Frank Sommer's tests show that the perfect saddle for thwarting penile numbness has yet to be designed. But he did evaluate 19 different seats to find out which ones outshined traditional solid, dome-shaped saddles, which allow anemic 20 percent blood-circulation flows. Sommer's top performers demonstrated blood flows above 70 percent. The best included the SPECIALIZED BG PRO (not shown, $80; 877-808-8154, www.specialized.com) and these seats:
SELLE ITALIA SLK GEL FLOW (Dan Winters)
TERRY PRECISION CYCLING, a women-specific bike company, used its experience designing women's saddles to produce the FLY Ti for men. ($110; 800-289-8379, www.terrybicycles.com)
SPECIALIZED: ALIAS (Dan Winters)
The SELLE ITALIA SLK GEL FLOW splits the saddle in half to ease pressure on the internal pudendal artery whether the rider sits forward or back on the seat. ($135; 800-279-3793, www.pronet-cycling.com)
In September, SPECIALIZED will introduce the latest creation based on testing in Sommer's lab, the ALIAS, which improved blood flow over traditional saddles by 400 percent. ($85)