After a number of soggy laps of the pits at Fort William World Cup, we have been rewarded with a handful of recent new tech to share with readers. A spotlight must be Aaron Gwin’s prototype Intense DH Bike with i-track suspension, in addition to Camille Balanche’s nearly manufacturing Commencal Supreme DH V5. We additionally bought eyes on the brand new RAAW DH bike that’s nonetheless beneath growth, raced by KJ Sharp and different members of the 555 Gravity Racing Crew (extra data to return), in addition to sneak peeks at a bunch of componentry that’s but to make it to manufacturing. Most of it we’ve little or no info on, however nonetheless felt it was price sharing photographs for curiosity’s sake. Feast your eyes.
Contemporary Tech from Spherical 2 UCI World Cup Downhill in Fort William
Gwin’s bike had greater than its fair proportion of prototype componentry; his mechanic, John Corridor, gave us some perception on the prototype TRP DH7 derailleur, growth of which continues to be ongoing. John performed a giant half within the growth of TRP’s derailleurs, having invented the “Corridor Lock”, which is actually a clutch mechanism for the derailleur’s B-Knuckle. The Corridor Lock is current on the present DH7 derailleur, and the TR12 for 12-speed cassettes, however its design is additional refined on the prototype we noticed on Aaron Gwin’s bike (by the way, we noticed a prototype TR12 not too long ago, too).
John tells us the thought to introduce what is actually a lock for the derailleur’s B-Knuckle got here from the need to maintain drivetrain noise to a minimal. On an everyday derailleur, say from SRAM or Shimano, simply because the cage can articulate in regards to the B-Knuckle in accordance with its chain tensioning perform, the place of the B-Knuckle itself is ready to pivot in regards to the mounting bolt, a perform that’s mandatory to permit the rear wheel to be eliminated.
It’s not, nevertheless, mandatory for the derailleur’s major perform of shifting the chain via the totally different sprockets of the cassette. This motion can create noise when driving tough downhill tracks, one thing that almost all riders, together with Aaron, might undoubtedly reside with out. So, John created the Corridor Lock, which locks the B-Knuckles place relative to the mounting bolt, eliminating motion and any noise related to it.
John stresses that he’s under no circumstances the primary individual to try to make drivetrains quieter, stating that loads of World Cup mechanics have been machining varied options through the years in a bid to maintain their riders’ bikes working as quietly as attainable.
The Corridor Lock seen on the present DH7 and TR12 derailleurs is adjustable by advantage of a set screw that may be seen on the machined physique of the derailleur, with the Allen head pointing towards the entrance of the bike. That is nonetheless current on the prototype DH7 seen on Gwin’s bike, however John tells us they’re engaged on an answer to get rid of this adjustment, in order that the Corridor Lock is a straightforward on-off change that doesn’t loosen over time.
The aim is for the Corridor Lock’s pressure to hit a candy spot whereby the B-Knuckle isn’t in a position to transfer beneath regular driving circumstances, however it is ready to transfer when the derailleur is hit off a rock, with a view to keep away from catastrophic, race-ending injury. So, even with the Corridor Lock on, you may nonetheless transfer the B-Knuckle in case you apply sufficient power.
John wasn’t in a position to share any particulars on different modifications to the TRP DH7, stating solely that it’s fabricated from a mixture of composites and aluminum.
Along with the prototype derailleur, Gwin’s bike was additionally fitted with what we imagine to be a prototype TRP crankset.
Elsewhere on Gwin’s bike, new rubber from Vee Tire Co was seated to the e*13 LG1R DH wheelset. “Vee Manufacturing facility Experience” have been the one phrases printed on the recent patch, however a spare tire sat on John Corridor’s workbench featured the phrases “No Sharpie” indicative of a Vee prototype. Certainly, we’ve not seen this specific tread sample on any of Vee Tire Co’s manufacturing tires, so count on to see recent rubber from these guys afterward this 12 months.
Elsewhere within the pits, GT Manufacturing facility Racing have been on a brand new GT Fury, which seems to have a revised linkage design whereby the rocker sits inboard of the seat tube struts. No close-ups of this cleaned up specimen have been permitted, however we have been allowed to get a have a look at one sat exterior within the rain, lined in Fort William’s worst. The entrance triangle has definitely seen an overhaul.
A brand new flip-chip on the decrease shock mount seems as if it could supply greater than the 2 positions supplied on the present Fury, with capability to change the fore-aft place in addition to the vertical place. We reckon this might supply alternative to change the linkage’s general development in addition to the bike’s backside bracket peak.