Scott unveils 5.9kg Addict RC road bike
The updated model is available with frame weights as low as 640g, says Scott, and complete bikes weigh as little as 5.9kg... which just so happens to be the weight of the first Scott Addict released 16 years ago, but today’s the official launch day and, as you read this, it should be available at Scott dealers. And boy, is it ever light.
The Addict RC Ultimate’s HMX SL frame weighs in at a claimed 640g, fully finished in a medium size. Scott had an unfinished frame on the scales at the launch, which was a nudge under 600g; prepping the frame, painting it and adding things like axle inserts adds 40g. “Really early in the process, we did a lot of different versions”, says Christian. “Some of them were generated by the computer, some of them were our proposals, driven by aesthetics. We compared all of them and really analysed every tube dimension. And then, obviously, it's all connected. You can’t just say: ‘This is the down tube size.
To combat this, Scott has tightened the head tube angle a touch and introduced a more offset fork for the smaller sizes to mitigate toe overlap . At the back, the seatpost has been moved, shunted forward 5mm relative to the bottom bracket to keep the chainstays the same length. A 5mm layback has been added to the seatpost to compensate. The bottom bracket has also been dropped very slightly to compensate for the higher tyre profile and keep the centre of gravity the same.
“Previously, when the fork pieces were fitted together, you always had these areas where you had double the wall thickness because you need some overlaps”, says Max. That’s changed with the new process, so there are savings there. And now, finally, we can have some continuous fibres from the steerer into the fork legs.”
“The tubes, even though they look roundish, are actually all following aerodynamic principles,” says Christian. “It's just that mainly the trailing edges of the tubes are more rounded to get a better stiffness-to-weight ratio. But you still get some of the characteristics of an aero bike – how it behaves in crosswinds, and so on.
To complement the new handlebar, there’s a skeletal 3D-printed metal GPS mount available in two lengths, which weighs in at just 10g. “There is a testing protocol in the ISO 4210-6 to test vertical fatigue loads on the seat post”, says Scott. “This testing setup can be used to determine frame comfort . When comparing the MY25 Addict RC equipped with the comfort seatpost against the MY20 Addict RC equipped with the SL seat post , the new version is 36% more compliant.”
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