thx for the post LowCel....i never know that...i just bought an ellsworth frame ISIS last year but i believe its some eailer model...coz they didn't make ISIS in 05....its prolly 04/03 frame.. brand new tho..or before 01?> i have no clue....i guess it can hold up right? the reason i bought it was becuase i cracked the toptube (not welds) but the tube on the GT zaskar after 1.5 season of XC