DesnaePhoto

I am trying to find a way to carry 2 more water bottles when I ride. Asking here as tri-folks tend to carry bottles behind the seat. I have seen the Performance one that goes on the seat stem and REI (gasp!) has one that attaches to the seat rails. Looking at other LBS, I have not found other options.

Searching this forum, I found the XLab information, but don't run an aero seatpost, so options become more limited.

My tubes, etc are carried in a small bag under my seat. A way to still carry that gear is necessary.

Any suggestions you can make would be most greatly appreciated.

Thanks
David

PDXaero

i have an xlab miniwing which mounts to the seatrails, it hold only two cages but has a spot for straps to carry a bag, and a slot for a nut that hold two 12g CO2 cartridges and a spare tube.
I eventually got the miniwing because i found it on sale for $30
The hydro tail only mounts to certain seatposts.
The minoura cages keep the bottles Real close to your butt.
And Xlab has a few different designs that all prevent bottle-launch, and i believe all mount to seat rails.

PistaRider311

I would go with the Profile Designs Aqua Rack https://www.profile-design.com/produc...ion/aqua-rack/ I run my decent sized bag that connects to my seat rails/post and just put the bottle rack right under the bag and works awesome. I haven't had one complaint yet, haven't dropped any bottles yet, and I don't think I will, it holds them pretty tightly.

12bar

I have had one of the Profile seat post mounted racks on my road bike for years and have no complaints. I can fit a nice size bag between the cages and the seat. I tried the seat rail model on my tri bike and hated it because I couldn't figure a reasonable way to carry tubes and co2 without it looking like some modern art sculpture.

10 Wheels

Psydotek

I really like the Minoura Double Cage Saddle Mount:

https://www.trisports.com/midocasamo.html

Leaves a nice big gap that accomodates a saddle pouch nicely. It also only costs $15. I have it on 3 bikes and it's been great. You will have to supply your own bottle cages (which are cheap).

I don't have them for aerodynamics but simply to augment my fluid carrying capacity. Also, one of my bikes only has a single seat tube bottle cage mount that's taken by my pump.

Hawaiiwrench

To the OP,
really depends on the exact saddle, it's fore/aft position, the type of seatpost and even the frame.
I do dozens of these in Kona on all sorts of bikes and there is no hard and fast rule here, just gotta rough it in and give it a shot.
Sorry.

DesnaePhoto

Everyone's suggestions are greatly appreciated. I ordered the Double Cage Saddle Mount from Trisports. Be here Monday. I'll let you know how it works out.

TTULaw

I was wondering when y'all use more than two bottles. I'm training for the Buffalo Springs 70.3 and had figured on only using two bottles.

PDXaero

extra braze-ons mean MORE BOTTLES

artifice

OP this may not solve your problem, but some thoughts:
I ride a 43. Not much exposed seat post. No room for a saddle bag with a rear h20 rack.
no room for a triangle seat bag on the seat tube with a h20 holder there, either. (bottle in that spot must be small to fit!)

however, with 2 frame water bottle holders and a dual rear one, if I put all my tools, tubes, etc in a water bottle, I still have 3 bottles of liqued on the bike. huuge help.

also, if you have aero bars, consider one of these: