Scott Addict RC Ultimate Review: A Sub-6kg Race Bike

Introduction

Scott has released a new range-topping road bike, the Addict RC Ultimate, and the headline claim is that it is the lightest production road bike in the world at a claimed 5.9 kg. That puts it under the 6 kg barrier that most off-the-shelf superbikes have not crossed.

The interesting part is not only the number. Scott reworked the frame, the fork and nearly every small part on the bike to get there, and the result is a complete, rideable race bike rather than a weight-saving exercise that sacrifices everyday usability.

Who This Bike Is For

This is a race bike, and it is built to be ridden hard. Riders who race, train with structured intervals or simply want the sharpest possible response from a road bike will get the most from it. It is also relevant for anyone who enjoys the engineering story behind a bike like this, where the frame comes in around 600 g, the fork around 270 g, and the cumulative savings add up to roughly 800 g less than the previous model.

It is not aimed at riders looking for a relaxed, upright position or a bike that doubles as a commuter. The Addict RC Ultimate is narrow in its focus and expensive, and it is happiest when it is being pushed.

What Makes It So Light

Scott used a new manufacturing technique to keep the inside of the frame as smooth as possible, removing excess carbon fibre and epoxy, and some tube walls are as thin as 0.6 mm. The bike is fitted with SRAM Red, which is the lightest groupset on the market, and almost everything else on the build comes from Scott’s own component range.

The wheels are a big part of the equation. They come from the in-house Syncros brand, use a one-piece carbon construction, and pair 40 mm deep rims with a 25 mm internal width at a claimed 1,170 g, with DT Swiss internals for reliability. The tires are an unreleased model that has already been raced to a stage win at the Tour de France.

Ride Quality and Handling

On the road the bike feels stiff, light and easy to ride while still feeling dynamic. The wheels and tires do much of the work, giving the bike a playful character that carries across different speeds.

It handles cobbles and imperfect tarmac well, helped by the wide internal rim width, and the handling stays calm and confident rather than skittish, even on a wet and bumpy descent. On rough, patched roads with cracks and potholes, it absorbs a good amount of the abuse without feeling vague. The turn of speed is strong and the frame feels very stiff under hard pedalling, so effort translates directly into forward motion.

Features Worth Knowing About

Every bike in the range ships with a multi-tool stowed in the handlebar drop, holding a T25 Torx head and a 6 mm wrench, which happen to be the only two tools needed to adjust anything on the bike.

Tire clearance is 34 mm, which is generous for a race bike. Scott claims the new Addict is 12 watts faster than the previous Addict and just 9 watts slower than the brand’s aero Foil. A magnesium titanium computer mount weighing 12 g is available as an extra for around 100 euros, and the lower Addict models ship with a compliance seatpost that accepts an optional magnetic rear light. A frameset-only option will also be offered, with a ready-to-paint frame planned for custom builders.

Things to Consider Before Buying

The paint is the most subjective point. The design mixes gloss and matte finishes with an abrupt transition, and while the intent is for the bike to look as light as it is, the finish does not have the same visual impact as the large logos of the previous generation.

The saddle is 130 mm wide, which is on the narrow side, and most riders will likely swap it out. Lower models in the Addict range use a different carbon layup, so their frames are slightly heavier than the range-topping bike.

There is also the practical point that a claimed 5.9 kg is measured before pedals, bottles, a saddle bag and a head unit. In real riding conditions the bike will weigh meaningfully more, and the weight advantage narrows accordingly.

Buying Advice

The Addict RC Ultimate is priced at £12,799, which makes it a considered purchase rather than an impulse one. Buyers who want the lightest possible build and the engineering that goes with it will find it here.

The rest of the range is worth a look. The four builds include a 105 Di2 model, two Ultegra Di2 models that differ mainly in the cockpit, and a Dura-Ace build, and the lower tiers remain competitive on weight and specification against comparable bikes in each price band. The 10 build stands out less clearly, since much of its premium goes toward the integrated cockpit.

If the goal is simply a fast, engaging race bike, the value in the range sits in the mid and lower tiers, where the frame is only slightly heavier and the ride character is preserved. A frameset-only route is also available for riders who already have components in mind.

Conclusion

A sub-6 kg road bike is not a necessity, and few riders will ever experience the claimed weight once the bike is fully equipped. What matters more is that the Addict RC Ultimate is stiff, playful and confident to ride, and that the rest of the Addict range carries much of that character at more accessible specification levels. It is a race bike first and a weight record second, and that is what makes it interesting.