Biotest Surge workout fuel -
http://www.t-nation.com/store/supple...rkout-fuel.jsp
The only pre/during-workout supplement you'll ever need, works awesome with hard core mountain biking.
Otherwise... Vitargo +electrolytes, Biotest Hotrox, Biotest Alpha Male, Biotest Spike, Beta Alanine, L-arginine, Natrol FeelANew just to name a few
