If the BMC Fourstroke name looks familiar, but the suspension layout doesn’t, that’s because the Swiss brand has totally revised their cross country and marathon platform, and in case you didn’t notice, they’ve also added a TQ-HPR50 motor to the system, hence the AMP suffix on the model name.
The 120 mm travel Fourstroke LT AMP frame design houses the same visually undetectable and nearly silent TQ motor that Trek uses in their
Fuel EX-e that we tested back in July.
Essential Details• Carbon fiber front & rear triangles
• APS dual-link suspension design
• 120mm front and rear travel
• TQ HPR50 drive, 360 Wh battery
• 66.5° head tube angle
• 77° seat tube angle
• Sizes: S, M, L, XL
• Pricing: $7,299 - $14,999 USD / €6,899 - €13,999
•
bmc-switzerland.com Not wanting to limit the hydration capacities on the bike despite the 360 Wh battery in the downtube, BMC rearranged the orientation of the shock on the dual-link carbon fiber frame to hold two water bottle inside the front triangle, while nestling an integrated display into the top tube and ditching the integrated dropper used on the unassisted version of the Fourstroke.
The Swiss aren’t known for creating affordable products, but they are known for their high standards. BMC offers four models in the range beginning at $7,200 USD and climbs to a price that will leave a hole in your bank account - $14,999 USD. The bike will be delivered in Europe first, starting in December 2022 with the highest priced model. A few months later, they will be available in the USA. From there, the pattern will continue as the less expensive models trickle in.
Frame and Motor Details Straight, sharp lines make for a clean outline on the Fourstroke AMP LT with no sign of a battery or motor visible from the side view. If you take a top-down view of the frame though, you'll see the integrated TQ display screen and likely pick up on the charge port at the top of the downtube, safely tucked out of harm's way. In the theme of creating clean lines, BMC has routed the rear brake line, and other necessary cables on the three lower-priced models, through a port on the side of the headtube.
In order to fit wider variety of seat posts, BMC moved away from the integrated and proprietary fit of the their in-house, oval-shaped dropper post that the standard Fourstroke features. By using a 31.6mm seat tube, consumers can run with the stock post or choose from an assortment of options on the market.
As for the motor, the system is identical to the HPR50 unit that so easily snuck past unsuspecting trail users during out previous test. In total, the assistance from the mechanical system weighs only 3.9 kg and produces 50 Nm of torque. All of the modifications to power output, controls, and visuals will be accessible via the TQ Motor app.
Suspension Design Judging by the lines of the Fourstroke AMP LT and the short, upper rocker link, you might wager that this frame could have been subject to a flexstay pivot, but BMC stuck to their kinematic objectives which were only achievable by using the APS dual link configuration. BMC states that the new kinematics decrease the anti-squat to reduce chain growth and pedal kickback deeper in the stroke. At the same time, they've added more progression to increase small bump sensitivity and more support towards the end of the travel.
Geometry Although this lightweight, marathon-style eMTB is built with similar components that you’d see on the XC World Cup circuit, it does receive a steep 77-degree seat tube and marginally slacker 66.5-degree head tube angle. The four sizes have smaller gaps between each reach number, starting at 437 and jumping up roughly 20mm per frame size, however, the chainstay lengths remain at 435 across the board.
Specs The Fourstroke AMP LT LTD is complete with Fox Factory suspension, including a 34 StepCast fork, and carbon DT Swiss XRC 1200 wheels, leaving little to be desired on the $14,999 top-end package that also includes full matching purple paint to the wireless oil slick SRAM XX1 AXS components. Dropping down the pricing ladder, the suspension on the AMP LT ONE moves over to RockShox, with a SID and Super Deluxe Air in the Ultimate trim, and alloy DT Swiss wheels, but keeps the SRAM G2 RSC brakes with 180mm rotors at each end.
From there on out, the two lower price points of the Fourstroke AMP LT TWO and THREE continue with RockShox suspension, but shifting and braking duties are covered by Shimano. Throughout the range, Maxxis Rekon 2.4" EXO tires are the choice for rubber and Praxis takes care of the cranks with alloy options.
@dancedancedanny : Alright, but who decides what's part of the equation and what is not? Could one set a KOM on a mullet DH bike before mullet DH bikes were allowed at the UCI?
If people really wanted to be a King of the Mountain they would race for real, not this digital fake racing for self esteem boost buffoonery.
I guess I understand an e bike for the winch and plummet crowd as a self shuttle, but I just don't get it for the xc folks.
JP
XC/DC is the largest segment, most local trail systems particularly sanctioned systems hardly require more than 120/130mm bikes. All the Strava chasers will gobble XC/DC e-bikes up! They want their name at the top of those leader boards. Most “mature” (i.e. financially capable) riders are not riding EN/DH trails anymore. I think manufacturers see where the largest pool of money is, and they are taking aim.
Why wouldn’t they just stay overbiked when a battery is added? They’ll be double-overbiked!
More than half of those were over-e-biked with 160mm full suss, the rest on cheaper models, so hardtails.
This BMC would have been the "perfect ebike" for those.
I am amazed by how much money people have... Many of those riders were so unfit that they hardly ride, but yet they cash out 6000€ for something they'll use 3h/month...
Counter argument to using ebikes only for DH laps because "in XC you're supposed to enjoy the climbing too" : it just a lot of fun to go fast uphill. Also, lots of people like the effort that goes with biking, but don't like the "trying to survive breathing" type of effort, I think everyone here who rides enduro format can understand that
I’ve ridden plenty of ebikes and still have zero interest
BMC Fourstroke AMP LT THREE - $7,299
Giant Trance X E+ 3 - $5,999
Commencal Meta Power TR Ride-$5,800
Yamaha YDX Moro $4,499
Yt Decoy Comp $4,999
Haibike AllMTN 2 4,499 Euro
The Giant emtbs are actually substantially cheaper. They’re also hot garbage.
And I wasn’t talking to you
And you can get a e-hardtail or e-trail for much less and be happy with it. If you can stand not being the fancier at the trailhead…
(I have a second hand meta power from 2019 and am super happy with this tank)
Less is more, but the wrong way around
It'll be very interesting to see what happens now that interest rates are going - in the words of one of our own - To The Sky!!!
I know it's probably impossible, as the tank for the post is in the downtube. However it would have been cool to see BMC's new automatic post included on this latest e-bike, maybe with the tank in the top tube?
Or maybe they can use the same power source for both, so a air powered dropper and an air motor for the pedals, that'd be extra efficient, and air ratchets sound cool.
Apparently your country was built on freedom of choice, amendments and all that jazz, but when it comes to ebikes, soooo close minded! Live and let live, you do you and let others do what they want, maybe one day you will get it. To quote your very smart countryman: "the universe is under no obligation to make sense to you" Amen Brother.
And yes, I am speaking from experience.
The problem you seem to have is educational, if they do not know, how are they supposed to behave according to our norms? But also people are dicks, no doubt about that. You would not seat on someone's ass on the road in the car, it is rude, you should keep the distance, so why would you on the bike? I do think it has more to do with humans being humans, not eebs, I do despair for humanity sometimes...
And sometimes people just have money to burn, like buying a $20,000 watch when a $10,000 is just a good and both are probably worse at telling the time than a $50 watch. Things don't have to make sense to all of us. The free market will sort it out in the end.
I've ridden one. They're perfectly fine motorized vehicles.
Your awfully defensive about not liking ebikes but yet you continue to engage in discussion about it? LOL
Something about ebikes bother you, its ok though, theres many places that offer counselling
Look at the comments I responded to. People being dumbasses and trying dismiss criticism of e-bikes as coming from people that have never ridden them/ are haters. @HeatedRotor and @mcozzy are just being jackasses. Yet here you are, going after me. Might be worth getting some CoUnSeLiNg to figure out why that is.
Shit, then I checked @noideamtber, same shit. Is this some sad alt account thing? Or do you guys really follow each other around? in any event, oof.
What more would I expect from a guy whose username seems like some weird brag about braking too much...
alt accounts would have been less sad than three men brigading each other's shitposts.