Valdora's Behind Saddle Bottle Cage Rack is A Must Have For Triathletes and Long Distance Road Riders Triathlon bike seat water bottle holder Also know as: Saddle water bottle holder | Bike seat bottle holder | Behind saddle water bottle holder | The triathlon bike hydration system that works. Multiple configurations for carrying water bottles, CO2 cartridges, and LED lights. Perfect for triathlon training and long training rides. A behind seat hydration system for racing bicycles. Attach 1, 2, or 3 bottle cages! Configure it to fit your needs! There are many possible configurations. Valdora's dual behind seat bottle rack attaches to the saddle rails and keeps your bottles out of the wind and in the slipstream. A must for long training rides. An extra bottle to replenish your between the aerobar bottle during races. Maybe a shot of the high carb nutrition that you will need. Or a modified bottle to carry an extra tube, tools, patch kit....whatever you can think of, carry it here. A competitor should not train or race without a Valdora hydro rack. Lightweight cnc'd alloy, tough, easy to adjust. Everything you need to train and race with confidence! Installation instructions included with rack and in pictures here. Not for use with carbon or 7 mm x 9 mm saddle rails or I beam. Saddle Water Bottle Holder | Triathlon Gear Triathlon Bike Behind Saddle Water Bottle Cage Mount. Multiple configurations for carrying water bottles, CO2 cartridges, CO2 inflator, and LED lights. Perfect for triathlon training and long rides. The bike seat water bottle holder. Bike water bottle holder behind seat. Behind Bike Seat Water Bottle Holder and Aero Bag, Includes Rack & Bag Behind Saddle Bottle Rack Includes Two Bottle Cages Under Seat Bicycle Bottle Cage Holder with Red LED Safety Light Bike Seat Water Bottle Holder - Under Seat Bottle Cage Rack Behind Saddle Bottle Rack Includes One Bottle Cage Triathlon Bike Aero Top Tube Bag Bento Box Tool Bag Buying Options Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 3.7 out of 5 stars 5 4.2 out of 5 stars 18 4.0 out of 5 stars 77 4.1 out of 5 stars 129 5.0 out of 5 stars 1 3.0 out of 5 stars 1 Price — no data $46.99$46.99 $36.99$36.99 $32.99$32.99 $38.99$38.99 $15.98$15.98 Setup Includes: Alloy Rack and Aero Bag Included Rack and 2 Bottle Cages Rack and Red LED Light Under Seat Bottle Cage Rack For Long Distance Road Rides and Triathlon a bike seat water bottle holder for increased hydration Under Seat Bottle Cage Rack and One Bottle Cage Aero top Tube Bag Rear Bottle Cage Mount Triathlon Style! Road bike water bottle cage back of seat mount. Details of saddle water bottle holder listed here - Bike Seat Water Bottle Holders & Rear Hydration Systems Bike seat water bottle holders, also known as rear hydration systems, provide cyclists with a convenient way to carry additional water bottles behind the saddle. These systems are particularly popular among triathletes, long-distance cyclists, and time trial riders who require easy access to hydration while maintaining an aerodynamic position. Types of Rear Bottle Cage Mounts Behind-Saddle Water Bottle Holders – These mounts attach to the saddle rails or seat post, keeping bottles within reach without affecting aerodynamics. Options include single, dual, or even triple cage mounts.Seat Post Water Bottle Holders – These attach directly to the seat post, offering a stable and secure bottle mount. They are ideal for road bikes, triathlon bikes, and time trial bikes.Saddle-Mounted Bottle Cages – These holders attach to the underside of the saddle, keeping bottles tucked behind the rider. Variants include single and double bottle cages with additional space for accessories such as CO2 holders.Triathlon Hydration Systems – Many tri bikes feature specialized hydration systems designed to integrate seamlessly with aero seat water bottle holders and other accessories. Key Features and Benefits Increased Hydration Capacity – Rear-mounted bottle cages allow cyclists to carry more water bottles, reducing the need for frequent refills. Aerodynamic Advantage – Positioning bottles behind the seat minimizes wind resistance, crucial for triathletes and time trial riders. Secure Attachment – High-quality saddle bottle cage mounts ensure bottles stay in place over rough terrain. Versatile Mounting Options – Riders can choose between saddle rail mounts, seat post-mounted bottle cages, and under-saddle hydration setups. Accessory Integration – Some mounts include additional storage options for CO2 cartridges, spare tubes, or tool bags. Popular Mounting Configurations Behind-Saddle Dual Bottle Cages – Allows riders to carry two bottles securely, often used in triathlon and long-distance cycling. Under-Saddle Water Bottle Holders – Mounts beneath the saddle for a low-profile hydration solution. Seat Post Bottle Cages – An alternative for bikes without sufficient saddle rail space. Rear Hydration Systems with Storage – Some systems combine bottle holders with compartments for tools or nutrition. Choosing the Right Rear Bottle Cage Mount For Triathlon & Time Trials: Dual rear bottle cage mounts are ideal for long races, paired with aero water bottles.For Road Cycling: Saddle-mounted bottle holders provide hydration without affecting frame space.For Touring & Endurance Rides: Multiple bottle cages help carry extra fluids for long distances. Bike Seat Water Bottle Holder with 2 Bottle Cages and 2 Bottles - The Rear Hydration System for Triathlon Bikes - A simple bike water bottle holder Valdora Behind Saddle Bottle Cage Holder for Triathlon and Road Bikes - Many configurations possible! Pictured above (for reference) with: Behind Saddle Bottle Cage Rack CO2 Cartridges Bottle CagesInsulated Water Bottle About The Tri Bike Bottle Cage Holder The behind saddle bottle mount rack consists of a light weight machined aluminum bottle cage rack. It will allow you to attach 1, 2 or 3 bottle cages, CO2 cartridges, an LED light or a bolt on aero bag. Configure to your liking!Often referred to as dual water bottle holders or seat bottle holders, these are so much more.Works with all standard saddle rails! Behind Seat bottle cage mount works with all round standard saddle rails (not I beam). A necessary triathlon accessory. Refer to image with measurements for specifics. Bike Seat Water Bottle Holder Saddle Rail Picture to demonstrate the type of saddle that this saddle bottle holder rack will work with. Compare to your saddle prior to ordering. 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