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Thursday, 17 November 2016

Tech Talk: Canyon Sender

Canyon Sender

To be the fastest, you have to get creative.” It was with this principle in mind that the Canyon Development Team set out to build an all-new thoroughbred downhill machine. With the performance to turn the racetrack into a blank canvas, their creation, the Sender CF, raises the bar to deliver the ultimate downhill racing platform.


Adjustable Chainstay

The Sender is available in a huge size-range, so should fit most riders really well. Fabien’s input has yielded a long, low and slack machine; in fact, it’s the longest mainstream DH bike on the market. The head angle is adjustable from 62-64 degrees and chainstay length can be altered too for different riders or terrain: pick either 430mm or 446mm.


Canyon Sender Frame

The Sender features some clever features to keep it running smoothly. Fully integrated downtube protectors and fork bumpers are present and correct, alongside a neat heel-rub shield on the left chainstay. The cable routing, while internal, is clearly designed to be rattle-free and easy to install. The chainstays are shaped and shielded to minimise chain-slap too. Industrial oversized pivot-bearings should last for ages, and the bottom bracket is threaded.


MX Link

Coil springs are a pain in the ass. Finding the right spring rate is fiddly and expensive; there are still big gaps between available spring rates, and there’s no means of adjusting the progressivity. Canyon appears to agree, as they’ve designed the Sender around air-sprung dampers. At its core, the Sender uses one of the most proven linkages out there, but this is no ordinary 4-bar design. This Canyon’s MX link inspired by motocross. By using a secondary linkage system to drive the shock in a given path, the engineers at Canyon could effectively create a suspension curve independently of anti-squat, anti-rise and pedal kickback. The MX link also isolates the shock from lateral flex in the frame, apparently reducing friction and wear. Still, they see the bike comprising three distinct phases – TPS (triple phase suspension). The three stage compression curve of the Canyon Sender is pretty basic stuff, a supple beginning, stable mid stroke and progressive ending to the bike’s suspension. 



Lead engineer Vincent Thoma talked in depth about the philosophy of the leverage curve, the bike’s high leverage beginning, lower leverage middle and a progressive ending that is reached by the progressivity of the air shock. “When developing the Canyon Sender’s four-bar suspension system we set out to create the perfect mix of three interlocking characteristics: anti-squat, pedal kickback and anti-rise. High anti-squat enables efficient acceleration but also results in more pedal kickback. We optimised this to strike a balance that actively increases the riders momentum without causing undue leg fatigue over fast repetitive hits. Effective anti-rise means the rear end remains active and in contact with the ground under heavy braking for exceptional traction and control when they’re needed the most”


TPS – Triple Phase Suspension:




Phase 1: Air shocks require more force for activation than coil shocks. To overcome this, the MX Link transmits more power at the start of the stroke, resulting in an increased amount of responsiveness, small bump sensitivity and traction around the sag point, which should 'feel' a lot more like a coil shock.

Phase 2: Support through the mid-stroke provides a stable platform to reduce momentum loss, enabling the rider to actively pump for more track speed and make decisive line choices.

Phase 3: Combining the progressiveness of air shocks with a more moderate progression at the end of the stroke to avoid blowing through the entire travel and to give the suspension its bottomless feel. Using volume spacers the rider can further fine-tune the shock’s progression to their needs.


Highlight:
  • Adjustable chainstay length
  • Integrated downtube, fork bump, chainstay protector and rear fender
  • Industrial oversized bearing in suspension links



Glossary:

Sag: Sag is the name given to the amount of suspension travel used up when the bike settles with a rider on board.

Chainstay: Tube connect BB housing with rear end

Bottom Bracket: The bottom bracket on a bicycle connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely. It contains a spindle that the crankset attaches to, and the bearings that allow the spindle and cranks to rotate. The chainrings and pedals attach to the cranks. The bottom bracket fits inside the bottom bracket shell, which connects the seat tube, down tube and chain stays as part of the bicycle frame.

Head Angle: The steering axis angle is called the head angle and is measured clock-wise from the horizontal when viewed from the right side. A 90° head angle would be vertical.


Source:
https://dirtmountainbike.com/bike-reviews/downhill-bikes/canyon-sender.html
http://www.pinkbike.com/news/canyon--first-ride.html
http://www.bikeradar.com/mtb/news/article/canyon-sender-the-hottest-downhill-bike-of-2016-46749/
http://www.mbr.co.uk/videos/bikes-and-equipment/canyon-launches-new-sender-downhill-bike
http://www.vitalmtb.com/features/First-Look-Canyon-Sender-CF,1345
http://flowmountainbike.com/post-all/canyons-wild-new-dh-rig-the-sender-cf/


Ride On!


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