AWESOME sale for the ENTIRE month of April:

get 20% off Alpha One aerobars, Styx aero skewers, and Beta rear carriers, all in stock, and ready to ship.
Sale lasts for ALL of April or while stock lasts! Subject to end early without notice.

Alpha One Replacement Monopost








  • Alpha One
    Replacement Monopost

    $84.99

    In Stock

No returns on Replacement Monoposts.

Replacement Monopost for Alpha One. This is the new, upgraded, unitary alloy version with additional stability. One is already included with the Alpha One aerobar. These can be cut to length if desired, so listing is available if you wish to have a spare, or if you cut one too short and now need additional length.



Alpha One Replacement Dragonfly




  • One solid piece of alloy
    machined to perfection


  • Unitary alloy structure
    stiffer part, stiffer system


  • Bottom-address bolts
    never occluded by cups or Scoops


  • Old vs New, explained


  • Old vs New, explained


  • Old vs New, explained
  • Alpha One
    Replacement Dragonfly

    $274.99

    In Stock

No returns on Replacement Dragonflies.

Replacement Dragonfly for Alpha One. This is the new, upgraded, unitary alloy version that offers several benefits compared to the older version. It is meticulously CNC machined from a single block of T6-6061 aircraft-grade aluminum, resulting in a stiffer and more robust system. Read all about its benefits right here.

One of these already comes included with every Alpha One sold, so if you are buying a new bar, you'll already get this part. But for older Alpha One customers who have the older version of the Dragonfluy and want to upgrade, or new owners who want a spare or damaged their old one, we have made it available as a separate purchase here.



Ergo Cups




  • Ergo Cups


  • Ergo Cups


  • Ergo Cups


  • Ergo Cups


  • Ergo Cups


  • Ergo Cups


  • Ergo Cups Measurements
  • Ergo Cups
    In Stock



No returns on Alpha Spare Parts.

TriRig is proud to make Alpha's spare parts available for separate purchase. If you need replacements, here they are. You can now buy the following:

  • NEW Ergo Cups: our new Ergo Cups are the ultimate in comfort. They work with all versions of our aerobars, and now come standard on our aerobars. They feature adjustable, slotted holes, so they can also work with almost every other bar on the market. The hole spacing is published in the images above, so you can compare to your own setup. The Ergo Cups have a large surface area, more arm wrap, and a super grippy textured neoprene pad, and ultimately a more comfortable and stable ride. They are more comfortable than anything on the market other than our own Scoops. They may interfere with a BTA bottle when used in certain narrower positions. You can get around this by using some ordinary standoffs/spacers from your local hardware store to lift the BTA bottle upward and clear of the cup itself.
  • Replacement Pads: standard replacements for the pads that come on our cups, same as what originally came with them.



Alpha One MVH Dragonfly








  • MVH Dragonfly
    for Alpha One

    $759.99
    In Stock


No returns on MVH Dragonflies.

This is a special Dragonfly for Alpha One. This version has narrower arm cup mounts, slightly raised extension clamps, and a flat top, allowing for the least possible frontal area and total elbows-touching positions. It adds about 10mm to the lowest-achievable stack height, and also eliminates the ability to use Ergo Cups in their forward position.

This is a highly-specialized part, only works with Alpha One, and is tremendously expensive to machine. These are carved out of solid T6 billet aluminum, CNC machined to exacting specifications, then media-blasted and hard anodized for a durable and lasting finish. They are intended for athletes with very specific needs, trying to optimize a very specific type of position.

The MVH Dragonfly is produced in VERY limited quantities. Once we are out of stock, we are unlikely to produce these again.