Argon18 sum pro

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Unlike many of its competitors, which have almost unanimously gone down the proprietary or one-piece bar-stem setup route, the bike sticks to a traditional non-integrated cockpit. This makes customising the Sum Pro easier — good for fettlers with exacting requirements — while the short stack naturally positions the bike towards the aggressive end of racy bike fits. Argon 18 says the frame features truncated aerofoil tubing throughout, with an optimised down tube said to help shape airflow around a water bottle. Up front, the fork uses bladed legs with plentiful clearance around the front wheel and tyre, and an hourglass-shaped head tube, which fits a 1. The frame fits a BB86 press-fit bottom bracket. I had my size-medium test bike set to the middle of the three settings 15mm , providing a stack of mm and reach of mm. This might not sound much, but the steering feels quite relaxed as a result.

Argon18 sum pro

What is in a name? Bike names are normally abstract, words that sound cool. A Sum, by contrast, sounds rather utilitarian. Mathematicians may disagree, but I have never thought of a sum as cool. Maths does however have a wonderful logic and precision. Having been one of the first people to ride the new Argon 18 Sum Pro , I now understand the name. It is a very clever sum indeed. My specialty is ultra endurance road, having cycled around the world twice, both in record-breaking time, which takes a very specific type of road bike. But whereas most professional cyclists will only ride their team bikes, my role as a GCN presenter means that I get to ride a huge variety of bikes. So whilst I will declare my bias, I have a broader context than most to do a ride review. That said, I am a bike rider and not a journalist, so here goes. Mine arrived soon after and I joined the team in January in the Alicante Province of Spain, a mecca for winter cycling, for some early season training. Photo by Martin Nordmark. GAMMA is not your typical bike shop.

For our newest generation of bikes, we wanted to push our 3D System even further by merging it seamlessly with the frame.

The Montreal-based brand has achieved WorldTour-level success on the road and more recently on the track under the muscular Midwestern muscle of Ashton Lambie during his world-record-setting 4K individual pursuit attempt. This year Argon 18 announced it would be consolidating its road bike catalog following the likes of Specialized and Scott by ceasing production of its aero-focused Nitrogen and lightweight-optimized Gallium frames. In place of the two models, Argon revealed the Sum series that combines the best characteristics of each. Aero shaping can be seen with the hourglass-shaped head tube, airfoil inspirations on the downtube, seat tube and seatpost, as well as the Kamm tail-shaped fork that is intended to divert air away from the downtube. We like the engineered clearance for up to 32mm of rubber. Argon 18 claims a medium Sum Pro frame weighs grams with the standard Sum frame weighing 40 grams more.

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Argon18 sum pro

Canada's Argon 18 has just unveiled two new road bikes called the Sum and the Sum Pro that are said to combine light weight and aerodynamic efficiency. Merging these two attributes has been a huge theme in high-end launches over the past couple of years, with Argon 18 saying that the new bikes are designed to perform both on the flat and in the mountains. They're going for the 'one bike to rule them all' vibe that Specialized was keen to shout about with the launch of the Tarmac SL7. Argon 18's introductory spiel goes: "Meet the best of the best: aero to match the Nitrogen, pure road performance to match the Gallium Pro, with race-ready handling and premium ride quality. The Nitrogen and Gallium Pro are existing models in Argon 18's range, of course. Or, they were.

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Discover the Sum. A say g difference in wheels, even if this mass is out at the rim, is so small compared to your body mass that the differences in wheel inertia will be imperceptible. Any particularly good or bad components? Maintenance-wise, we charged the AXS derailleur batteries once a week with the system performing without compromise. That said, I am a bike rider and not a journalist, so here goes. Any components which didn't work well together? While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. Your subscription will help us to do more. I had my size-medium test bike set to the middle of the three settings 15mm , providing a stack of mm and reach of mm. They are pre-taped and tubeless-ready, plus they include a set of valves. Rate the bike for low speed stability:. That's what I'd be interested in seeing as I thought that water can only make something else wet. The only thing I question is the use of a mm rear disc, as there is little real benefit to using a smaller rotor size, and I think more riders would benefit from a mm on both front and rear. Very good, with little flex noticed. Rate the wheels for performance:.

The Montreal-based brand has achieved WorldTour-level success on the road and more recently on the track under the muscular Midwestern muscle of Ashton Lambie during his world-record-setting 4K individual pursuit attempt.

Sum Pro Quiver-killer? On all widths, the compact bar has a mm drop, 78mm reach, and 4 degrees of flare. Fast, but not in a way that makes handling difficult. I can't talk about value for money over brand though, as I have what friends have described as the Specialized demo fleet in my garage. D-Squared 12 hours 39 min ago. As well as the wheels being different to the standard spec, our test bike came with one non-tubeless Rubino Pro tyre and one Vittoria Corsa TLR, both 25mm, so I wasn't able to test how the bike rides with a full tubeless setup. It isn't a completely magical carpet ride, but for a race-orientated bike it is extremely impressive. As I said earlier, Argon 18's decision not to have a bespoke integrated cockpit setup makes it easier to swap out the handlebar if it doesn't suit. Your review Please enter a valid value. Another small but frustrating feature is that the rear derailleur hanger is held in place by a tiny bolt. On downhills we found ourselves spinning out around 38 mph rather than 36 mph, though this remained a relatively rare feat.