The riser that came with my frame has those rivnuts. For me, they don't work as my knees hit the bottle when climbing out of the saddle. Pity.
Jur
Not sure if you could reach the bottle, but maybe if you 180 the stem riser and put the bottle/mount forward, your knees wouldn’t hit. Then you'd have a backup, the one on your seatpost and the second on the riser. I tried that Spyder "saddle" for a while but even with padded cycle shorts my butt was glowing after a short ride. For the most part, I'm an old Serfas Hybrid R/X Cane Creek Thudbuster seatposter tourer.
I tried water bottles back when, but am too clumsy and was always dropping them… lol… screech, stop, walk back, pick it up, and start over. I switched over to a Camelback bladder inside my pack soon after they came out and it works well for me. I also always have room for extra gear, food and shopping basket on my back as needed, but then again I live out of one bag, and on one bike, no car or permanent home. So my bag is very much like my turtle shell, with pockets, bivy, rain gear...
Kaito
Interesting stem riser stack; is that an Airnimal Joey riser on to of a stock Swift riser painted black? I had never thought to stack like that to get more height. Kewl. I’ll bet those 451’s with the 53/12 combo does let you rip top end. Thanks for the photo.
I've got my beastie in pieces for polishing, crank bearing swaps/greasing, derailleur hanger locktighting and cable rerouting. It is all split down to a pile of parts. I'll take some "in the suitcase" photos and reassembled shots for next time.
Xoot-on!
http://www.myspace.com/xootrswift