UCI-illegal at 5.9kg: My lightweight Cannondale SuperSix Evo HM build

After weeks of hunting for the right parts and balancing weight savings with durability, I finally hit my goal: a rideable UCI-illegal build based on a 2017 Cannondale SuperSix Evo HM frame. The goal was to push the limits of weight without sacrificing safety or ride quality and not breaking the bank. Here’s how it came together:

Frame: Cannondale SuperSix Evo HM (2017), a proven platform for stiffness and low weight.

Groupset: SRAM Red 11-speed – crisp shifting and lightweight, paired with a Cannondale Spidering crankset for a touch of brand cohesion.

Drivetrain:

• Cassette: Ultegra (for its balance of weight, durability and price)
• Chain & Brakes: Dura-Ace (because every gram counts, but so does stopping power)

Wheels: No-name 45mm Chinese carbon wheels (1180g for the pair) surprisingly solid for the price, and they’ve held up well so far.

Tires & Tubes: Continental GP5000 in 25mm with TPU tubes, the perfect combo of low rolling resistance and puncture resistance. I was affraid of the clearance, but 28 might fit aswell

Everything Else: A mix of lightweight, budget-friendly parts sourced from AliExpress. I avoided going too extreme, no sketchy brakes or uncomfortable saddles because I still want to enjoy riding this thing.

The Result: A bike that’s fast, responsive, and just over the UCI limit. I could shave off more weight, but I drew the line at compromising safety or comfort. For now, 5.9kg is the sweet spot.

Would love to hear your thoughts

🙂