• Logo color Frame: Glossy UD Carbon
  • Enter specific requests for custom colors, alternative components, etc. A Dimond representative will contact you.

Explore the Koi

In the early 2000s a large and unique diamond gemstone was discovered in the Republic of Congo. Weighing well over 60 carats this humongous chunk of diamond filled with inclusions and color variations was slated for industrial use when a young diamond gemstone cutter saw something special and changed the fate of the diamond forever. This young gemologist had a vision of turning the diamond into the Koi Diamond. He cut the diamond in a pear shape, showing striations of white and orange with speckles of yellow and black. What is now a world famous 32 carat diamond gemstone symbolizing strength and perseverance was almost never created. 

In the quest to design the ultimate road bike the engineers and designers at Dimond created a few prototypes using their proprietary molding process. Most of these prototypes are then incorporated into the final design of a product. One particular prototype made it all the way to wind tunnel testing before eventually becoming what is now the Radiant. Another top performing prototype was recognized as being brilliant in its own right by a young Dimond engineer who was inspired by the story of the Koi gemstone.

“Due to their endurance and perseverance, the Koi are symbolic of overcoming adversity and fulfilling one’s destiny.”


This young engineer at Dimond presented a similar idea to save the prototype frame and refine it into a lower cost frameset. The Dimond Koi road bike was born in the USA and is now manufactured at our partner facilities in Asia to our exact specifications. This feature rich bike brings you a stunningly beautiful frameset at a lower cost that only Dimond can offer. With endurance and perseverance you can overcome adversity and fulfill your destiny with your own Dimond Koi Road Bike.

Fully integrated barstem

Cabling is as clean as it gets with the Red Crown Raven one-piece barstem and integrated headset. Internal cable routing channels and a slick headset and spacer system make shifting and brake lines disappear for an ultra clean look. 35mm of spacers are available in 5mm increments for stack height adjustment above the headtube. The all carbon barstem can be painted to match your frame and is available in multiple sizes.

Raven Barstem available sizes:

Bar Width: 380, 400, 420, 440 mm
Stem Length 90, 100, 110, 120 mm

Flush Mount Shimano Di2 port

Shimano electronic groupset users will enjoy easy access to the Di2 charging port in its convenient location on the frame’s downtube. It is situated perfectly to be concealed and protected while riding, yet immediately accessible for battery charging between rides. Alternative covers are available for builds using other groupsets.

Build Specifications

Shimano Ultegra Di2 2×11 Shimano 105 2×11
Frame Koi UD Carbon Koi UD Carbon
Fork Red Crown Road Disc Red Crown Road Disc
Headset Integrated 1 1/8″ – 1 1/2″ Ritchey Comp
Seatpost Koi lightweight carbon Koi lightweight carbon
Stem / Handlebar Red Crown Raven integrated barstem Ritchey Switch / EVO Curve Comp
Saddle Fizik Arione Shimano PRO Falcon
Shifters Shimano Ultegra ST-R8020 Shimano 105 ST-R7020
Front Derailleur Shimano Ultegra FD-R8050 Shimano 105 FD-R7000
Rear Derailleur Shimano Ultegra RD-R8050 Shimano 105 RD-R7000
Brake Calipers Shimano BR-R8070 Shimano BR-R7070
Rotors Shimano SM-RT800 140mm Shimano SM-RT54 160mm
Crankset Shimano Ultegra FC-R8000 Shimano 105 FC-R7000
Bottom Bracket Shimano SM-BB72 Shimano SM-BB72
Cassette Shimano Ultegra CS-R8000 11-28T Shimano 105 CS-R7000 11-30T
Chain Shimano CN-HG701 Shimano CN-HG601
Tires Continental GP5000 700×25 Continental Ultra Sport 700×25
Tubes Continental Tube Continental Tube
Wheels Red Crown 40mm Shimano WH-RS171


There are no reviews yet.

Be the first to review “Koi”

Your email address will not be published. Required fields are marked *