Thanks,
JT
I don't know which one the SBH is, but I put a Minoura bottle cage
adaptor for saddles back on the rack at a dealer as obviously too
narrow to fit my B73 (same width rails as the B67, I think).
However, another adaptor by Tacx looks like it has adjustability both
in width and for angle of the arm sticking out, especially since the
arm swivels independently. It is all plastic, with nice stainless
hardware, and has three sets of sockets for one or two bottle cages (I
don't think you'd fit three in the space available). It is definely
bulkier than any of the Minoura but not very heavy. Pricey, and you
must in addition buy bottle cages because the thing is only an
adaptor. I left it on the shelf because I suspected it would put the
water bottles precisely where I want to put my rack bag. Pic here:
http://www.tacx.com/producten.php?fl=true&language=EN&lvlMain=19&lvlSub=69&ttop=Accessories
-- note that the nice silver carbon bottle cage doesn't come in the
box, only the adaptor.
Andre Jute
You can drink from only one waterbottle at a time
Minoura SBH-300 - see eg:
http://www.amazon.com/Minoura-Bottle-Holder-SBH-300-Double/dp/B001B13J1E
Thanks for that Tacx holder suggestion - Books B17 rails are about 9cm
apart
(at the point where they bend upward from horizontal position). But on
another
road saddle I own - Fizik - rails at the similar point are about 4cm
apart.
I will see if anybody in town carries that Tacx holder.
Alternative is on the seatpost holder eg:Profile AquaRack:
http://www.amazon.com/Profile-Aqua-2bolt-holder-seatpost/dp/B000OQV51S/ref=sr_1_24?ie=UTF8&s=sporting-goods&qid=1241831101&sr=1-24
but I heard they "eject" bottles very easily.
You might look at the Profile Aqua Rack which mounts to the seat post.
"http://www.profile-design.com/products/hydration/aqua-rack/"
Aqua-Rack is also known as "bottle-ejector" but on last organized
ride
I did I seen a lot of fast riders with that rack behind their saddle.
So
maybe it is not THAT bad.
For me it is not question of aerodynamics - jsut want to have MORE H2O
on my bike during summer in Texas. Especially on long unsupported
rides (100+ miles) - which is what I want to do this summer.
I will give AquaRack a try - worst case scenario I can use bungee-
cord
to hold bottles in place - it defeats the purpose a bit - not being
able
to grab them during the ride - but I can always use one on the
downtube
and then switch.