Basso Diamante first ride review

Handcrafted Italian carbon race machine

Our rating 
3.5 out of 5 star rating 3.5
GBP £4,800.00 RRP

Our review

Super-slammed purist race machine with stunning handling
Skip to view product specifications

Italy’s Basso’s UK presence is rising, mainly due to its exclusive availability through Cycle Republic stores and sponsorship of the Morvelo Basso UK team. The 40-year-old company makes all of its carbon frames in its Italian facility.


Basso Diamante kit

The Diamante’s front end makes this model stand out — the integration of the fork crown into the oversized head-tube junction is something we’ve seen before, but the top of the head-tube is set deeper into the frame than usual for a super-slammed front. 

Basso includes its Comfort Kit with the frameset, which adds 20mm to the stack and blends in perfectly with the frame. The dedicated Basso stem takes up less height than a standard stem with its ‘squished’ ovalised tube shape. 

Adjustability is the key — you can slam it as low as you want, or rise it up to a more sportive-friendly position.

Basso provides the carbon aero seatpost
Jonny Ashelford
The short wheelbase and steep head angle (73.5 degrees) make the Diamante a whip-fast handling bike. It’s a thrill to snap the bike into a corner or thread through the tightest gaps at speed.

The standard Diamante Ultegra retails for £2999 with Microtech’s (Basso’s in-house brand) alloy wheels. I opted for the special order model, which upgrades to Microtech’s M150 carbon clinchers, carbon bar and a carbon-railed saddle, which all add a lot to the price.

Basso Diamante ride experience

While the Diamante is an exceptional handling bike, it doesn’t provide an exceptional level of comfort. 

The San Marco Regale saddle is overly firm and narrow and no matter how much I shifted around, I couldn’t find a comfortable spot. That’s easy to change, but I would like to see more volume from the wheel tyre combination too. 

Shimano Ultegra brakes with Microtech pads could be better in wetter weather
Jonny Ashelford

The Michelin Pro 4 tyres zip along the road and are tenaciously grippy, but mounted on the deep but slender M150s, the 23mm rubber is fine on smooth blacktop but jarring and harsh over rougher roads. The frame is designed to take 25mm tyres maximum.

Braking from the Ultegra units with Microtech’s pads on proprietary carbon rims is good, but it does feel a little hard and is no match for the brake-feel expected from ENVE, Zipp, Bontrager and DT. In the wet, the brakes’ performance is even more muted.

On smooth Italian mountain passes in summer, the Diamante would be a joy, but for the damper, rougher conditions in the UK I’d make a few spec changes to get the best out of this distinct Italian thoroughbred.


Basso Diamante specification

  • Weight: 7.41kg (58cm)
  • Frame: Carbon
  • Fork: Carbon
  • Gears: Shimano Ultegra 52/36, 11-28
  • Brakes: Shimano Ultegra
  • Wheels: Microtech M150 carbon clinchers
  • Tyres: 23mm Michelin Pro 4 Service Course tyres
  • Bar: Microtech Quantum carbon
  • Stem: Basso
  • Seatpost: Carbon aero
  • Saddle: San Marco Regale Carbon FX

Product Specifications


Name Diamante
Brand Basso

Brakes Shimano Ultegra
Fork Carbon
Frame Material Carbon
Front Tyre 23mm Michelin Pro 4 Service Course tyres
Handlebar Microtech Quantum carbon
Rear Tyre 23mm Michelin Pro 4 Service Course tyres
Saddle San Marco Regale Carbon FX
Seatpost Carbon aero
Shifters Shimano Ultegra
Stem Basso
Wheelset Microtech M150 carbon clinchers