Review: High-quality fast road e-bike with the new Mahle motor cycling Ride_BMC
The Roadmachine AMP One is from BMC's road e-bike line-up, and it's a belter. It may come with easy-to-live-with endurance geometry, but the firm ride and stiff frameset mean it is very much about performance. Mahle's latest motor system offers a smooth and intelligent power boost, which really allows you to ride harder for longer, with the added weight of the motor and battery never a major concern.
In every other circumstance, the motor kicking in smoothly negates the weight, or if you're riding above the motor's assistance speed you are travelling fast enough that weight isn't really a concern. The couple of months I spent testing the Roadmachine has seen me riding on salt-covered roads and all the greasiness that comes from that. You get great feedback from the frame and fork, so that when you're entering a roundabout or corner and your tyres start to slide, the handling gave me the confidence that I could just make small corrections to the steering to regain traction, so there was none of the under-correction that can happen with fast-steering bikes.
I was particularly impressed with the fork, and in spite of its slender legs it was stiff enough to cope with braking from high speed and hard cornering, while simultaneously bringing a smoothness to the front end. This means that you get a fork steerer that is straight rather than tapered, which reduces front-end stiffness, while the dropped seatstays are also designed to increase compliance.
Only the top three sizes, starting with this 56cm frame, have wheelbases over a meter long. Our bike's 1008mm wheelbase is paired with 410mm chainstays, which help to give the BMC a nimble feel. As for mounts, the Roadmachine AMP is very much racier road bike, so you won't find any points for mounting mudguards or bento boxes; all you get is two bottle mount positions.
I've been riding this bike for quite a few months, and it feels as if we have adapted to each other. Depending on my cadence and how much pressure I put through the pedals, I was able to manipulate the power delivered. To further increase range, you can add a 172Wh battery extender that is shaped to fit into a standard bottle cage.
The charge point is located behind a rubber cover at the bottom of the seat tube, with the battery designed to be charged in situ rather than removed.An improvement is that the X20 does away with the X35's external wiring and the bolt-on axles, so it works with a standard thru-axle, and you drop the rear wheel out just like you would on a standard road bike.
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