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Merlin Nitro SL Carbon Road Bike – Shimano Ultegra 6800 11 Speed Drivetrain

The Merlin Nitro SL is our superlight race bike weighing a helium light 7.70kg and featuring oversized tube profiles manufactured from extremely high modulus carbon. Lightweight and super-stiff at the bottom bracket the Nitro is extremely responsive and is ready to accelerate when you jump out of the saddle to sprint.

With weight saving and a clean, fuss-free design at the front of our minds we included some versatile dual purpose internal cable routing using the same holes for mechanical and electronic shifting resulting in a very clean look. While the Nitro responds quickly to your pedaling input thanks to its lateral stiffness there is also a small amount of flex engineered into the seat stays to increase vertical compliance giving some welcome additional comfort on longer rides.


Key Features

The Merlin Nitro SL carbon frame features an intelligently engineered mix of 60 / 40 / 30 Ton High Modulus Carbon and a full carbon fork married up with a carefully selected groupset, wheelset and componentry. With a precise shifting, capable Shimano Ultegra 11 speed groupset and a pair of Fulcrum Racing Quattro wheels the Nitro is ready to race straight out of the box. 


Our best-ever-value lightweight carbon road bike has recently gained rave reviews from the cycling press….


Road CC Review May 2017 - Rated 4.5 / 5

"The ride is sublime, that balance of stiffness and the way it deals with the bumps in the road is a masterclass in carbon fibre layup and tube design. The Nitro SL just seems to take everything in its stride with regard to road surface imperfections. Merlin has played a blinder here, offering a race proven frame at such a great price..." - Full Review Click Here


Cycling Weekly Review 12 December 2016 - Rated 9/10

"The Nitro SL offers an interesting and rewarding mix of efficiency and comfort. You can feel the stiffness of the bottom bracket area and the rear triangle, it delivers the most tangible feel of efficient power delivery that I've encountered."

"Merlin has pulled off something of a coup by sourcing a frame ridden at World Tour level in 2016 and offering it as a great value package. You can feel the frame's racing heritage in its ride performance, but if delivers without sacrificing comfort... £1750 - It's something of a bargain." - Full Review Click Here


The Telegraph - Full Review Click Here


Merlin Nitro SL - VIDEO - 'Made In Belgium' - Click Here



  • Frame: 60 / 40 / 30 Ton High Modulus Carbon
  • Fork: Full carbon


  • Fulcrum Racing Quattro LG wheelset
  • Tyres: Continental Ultra Sport 2 Folding Bead 700x25


  • Gear/Brake Levers: Shimano Ultegra 6800
  • Front Derailleur: Shimano Ultegra 6800
  • Rear Derailleur: Shimano Ultegra 6800
  • Chainset: Shimano Ultegra 6800 52/36T 11 speed
  • Cassette: Shimano Ultegra 6800 11 Speed 11-28T
  • Chain: Shimano 11 Speed
  • Pedals: Not included


  • Saddle: San Marco Ponsa
  • Seatpost: 4ZA Stratos
  • Handlebars: 4ZA Stratos
  • Grips: Black Cork Handlebar Tape
  • Stem: 4ZA Stratos
  • Brake calipers: Shimano Ultegra 6800


Sizing & fit

Geometry Information

These sizes are a guideline only. If you are unsure please contact our customer service team for assistance:

PLEASE NOTE:  All of our bikes are built to order.  This usually takes between 3-8 working days depending on time of year

In my next bike I was looking for an excellent frame and a very good specification at an affordable price and have found all of that in the Nitro. The bike is light and extremely comfortable and any concerns I had about flex and feel in my change from an alloy bike have been immediately dispelled. I am delighted both with my purchase and with Merlin.
Bought after reading RoadCC review online. Merlin were spot on with ordering, times and comms. The bike? Well packed, and after a 30 minute assembly and check over, a saddle change to my preferred model, and a short set up ride I'm loving it. Fantastic frame and group set, wheels are sound and the finishing kit absolutely fine, crisp and lively and superbly smooth on the road. For the price of a brilliant frame you get a bike. Highly recommend the bike and Merlin.