TriRig BTA Starter Kit

TriRig BTA Starter Kit is a between-the-arms hydration bundle for time trial and triathlon bikes. TriRig designs it for newer racers and everyday training rides, with the aim of keeping a bottle within easy reach without costing speed. It packages three TriRig parts that RA also sells separately.

What's included

• Universal BTA Adapter Plate: a 6mm slab of T6-6061 aluminum with a hard-anodized finish. It installs directly beneath the arm cups and adds a bottle mount to aerobars that have no bolt bosses of their own.
• BTA Bottle Mount Riser: raises the mounting surface by 80 mm to bring the bottle to a more accessible, more natural position. CNC-machined T6-6061 aluminum, hard-anodized.
• Multi-Bottle BTA Rail: machined from 10mm billet T6-6061 aluminum and hard-anodized. It supports one to four bottles or accessories in multiple positions.

All three parts use standard bottle cage spacing, so most cages should bolt on. The kit does not list a bottle cage, so plan on supplying your own.

The riser is fixed at one height. If you want to adjust bottle height and tilt, and want a cage in the box, the TriRig BTA Sport Kit swaps the riser for the BTA Elevator and adds a Kappa cage.