BMC’s full-suspension XC Fourstroke mountain bike appears to be like set for an entire redesign if this prototype raced at MTB Worlds with the brand new SRAM Eagle AXS is something to go by. Plus, BMC appears to have casually let slip an actual timeline for the launch of that next-gen direct-mount SRAM Eagle AXS derailleur prototype we noticed on Nino’s Scott.
We’ll solely have to attend a month for the complete particulars…
BMC Fourstroke all-new prototype XC bike
c. an nameless Bikerumor fan
On the UCI XC MTB World Championships final weekend in Les Will get, a few riders from the BMC MTB Racing crew have been noticed on a brand new and as-yet-unreleased carbon BMC Fourstroke prototype XC mountain bike, with all-new tube shaping and a reoriented shock format.
Plus, the bikes of those two racers additionally seem like constructed up with the identical direct mount BlackBox SRAM Eagle AXS derailleur prototype, the identical hole plate Eagle FlatTop SL (T-Kind) chain, and similar new XX1 SL Eagle cassette with 3 machined alloy cogs that we noticed on N1N0’s bike.
Take a look at our Professional Bike Test of 10x World Champion Nino Schurter’s setup for the complete particulars of all the pieces we learn about that prototype SRAM Eagle AXS drivetrain – the patents we’d uncovered years again, the anticipated efficiency positive aspects, and UDH compatibility.
Each Filippo Colombo & Titouan Carod have been on the brand new BMC Fourstroke prototype, with Filippo incomes an XCC podium & an XCO prime ten on the unreleased bike.
Apparently of word, Pauline Ferrand-Prevot opted to not trip the brand new bike, however to race the BMC Twostroke carbon hardtail as a substitute, with a purpose to profit from lighter weight and improved effectivity for the Les Will get climbs. That appeared like a very good name as she went on to win the World Championship title in each quick observe XCC and Olympic distance XCO.
What do we all know? BMC Tech particulars
c. Filippo Colombo, pictures by Maxime Schmid & 3SO L’Agence
BMC hasn’t shared any particulars on the brand new bike but. However the obvious shift for BMC who lengthy held the opinion {that a} vertical shock orientation yielded the very best efficiency… the unreleased BMC Fourstroke prototype strikes to a horizontal shock format.
It nonetheless seems to be a short-link digital pivot-style 4-bar with a unified rear finish (not precisely a URT because it doesn’t embrace the BB) and a tiny rocker driving the shock. However now the rear triangle has moved to a extra symmetric design with a vertical strut connecting seat & chainstays on either side of the bent seat tube, and a publish mount brake now on the seatstay.
The downtube drops a bit on the backside bracket, presumably to make extra room inside the principle triangle. These Fourstroke prototypes we’ve seen don’t seem to incorporate a cage mount on the seattube. However they do appear to have 5 water bottle bosses on the downtube. The racers at Worlds had only one bottle cage within the second-to-lowest place, however this certainly would permit for two bottles or a bolt-on instrument/spares service beneath a full-size water bottle?
c. Filippo Colombo, pictures by Maxime Schmid & 3SO L’Agence
The brand new BMC Fourstroke prototype will get a steeper sloping toptube extra in step with the seatstays and appears to characteristic extra boxy tube shaping in its rear finish, with the identical pointed seatstay caps & hidden {hardware}. Up entrance, the principle triangle is a little more rounded than the present angular bike. The brand new bike retains the short-travel built-in RAD elliptical dropper seatpost, now in shiny silver ano, and strikes its inner cable routing from the underside of the downtube, as much as the perimeters of the headtube.
And naturally, it strikes to the brand new UDH-compatible (?) SRAM direct mount rear derailleur.
c. BMC
Despite the fact that it’s a utterly completely different suspension design in comparison with the present Fourstroke, we’re fairly positive it should preserve the identical title. How? These teaser pictures on BMC’s homepage are named “Fourstroke”.
BMC isn’t actually hiding the unreleased Fourstroke prototype very a lot both. The truth is, the brand new bike is on their homepage now, and you may signal as much as be one of many first to get the complete particulars:
“Spot one thing particular in Les Will get? Signal as much as be the primary one to know.“
BMC Fourstroke & SRAM Eagle AXS coming quickly?!
c. BMC
Clicking BMC’s “Inform me extra” button takes you to a web page referred to as “The Closing Countdown” with a clock counting down simply over a month left till the October fifth unveiling.
And see what’s peeking out of the underside of that picture above on the finish of the brand new Eagle FlatTop SL chain?
That’s the brand new direct mount SRAM XX1 Eagle AXS derailleur!
However as a substitute of being stealthy all-black just like the BlackBox prototypes on Filippo Colombo’s new bike or the one raced by Nino Schurter… this one has polished alloy on the higher B-knuckle direct mount. That appears rather a lot like a completed consumer-ready product. So, it seems like SRAM goes to should launch it earlier than Oct 5, 2022 if this new BMC goes dwell in simply 32 days.
Tick, tock!https://bikerumor.com/all-new-bmc-fourstroke-01-gets-rad-with-integrated-80mm-oval-xc-dropper-post/present
