Joining the 3-version analog BMC Fourstroke own circle of relatives added the remaining week is the brand new Fourstroke AMP LT motorised eMTB version. It has the identical 120mm of touring the front and rear as the same old LT version, stocks 95% of its geometry, however tweaks the APS suspension barely to deal with the whisper-quiet TQ-HPR50 motor.
Side view of the 2023 BMC Fourstroke AMP LT E-Mountain Bike
At a glance, you would be hard-pressed to inform me it is an e-bike. The downtube homes the battery, however they made it as narrow as viable even as becoming a complete sleeve of cable, hose and twine courses strolling subsequent to the battery.
Geometry is the identical 66.5º head attitude with 40mm BB drop and 170mm cranks. Chainstay period is handiest 3mm longer and large body sizes have barely decreased attain figures.
A close-up of the TQ motor at the 2023 BMC 4-stroke AMP LT E-Mountain Bike
The motor is small and has a slender Q-component, so it feels and pedals like an ordinary bike.
Basically, the Fourstroke AMP LT rides each bit as nimble and successful as the pedal-powered version, however with sufficient assist to make the ones huge days a touch bigger.
Like the ordinary LT, the AMP LT receives 120mm of the front and rear wheel tour. And it locations 5 bottle heads at the downtube, permitting you to run bottles in the front triangle on all body sizes!
A lighter body, motor and production way they could use lighter suspension. Inline rear shocks are put together with Rockshox SID or Fox 34 Stepcast forks.
AMP frames get the identical notched pinnacle tubes, developing area above the top surprise mount for the far off lockout cables, and that they say it really is coming in the close to future… (no LT fashions get far off lockouts)
A close-up of the suspension on the 2023 BMC Fourstroke AMP LT electric mountain bike.
It makes use of the identical Advanced Pivot Suspension (APS) machine because of the others, which presents huge traction on climbs and extraordinarily energetic overall performance in the tough stuff even as retaining performance on climbs.
The handiest distinction right here is that the decreased hyperlink is positioned better to deal with the motor, however it runs nearly identically to the analog bikes.
The bike suits 29×2.4″ tires, the front and rear. An included dust flap covers the lowest hyperlink and forestalls the chain manual from bouncing off the chain.
The charging port is positioned in the top phase of the downtube and the show is embedded in the top tube. A button turns it on and rancid and cycles via a confined choice of information points (battery percentage, closing variety).
A mode transfer is positioned at the handlebar, with an extended press of the up and down buttons to set off the stroll help mode or transfer off the motor respectively. Its narrow shape component leaves masses of area for the AXS and mechanical dropper seatpost levers.
Racing smoothly, Ascending mountain.
The TQ pressure unit is the identical ultra-quiet machine first added at the Trek Fuel EX-e. Check out our complete technical function at the TQ machine to see the way it works without gears or belts.
A cutaway of the TQ HPR50 e-bike pressure machine
It is without a doubt noise unfastened and churns out a maximum energy of 50Nm. It weighs 1.85kg (~4lbs) with a 300W motor paired with a 1.85kg 360Wh battery.
The AMP LT locations -bottle mounting positions within the front triangle, ideal for the approaching TQ 160Wh variety extender battery %. The bottle-formed battery % has an extended cable that may be positioned withinside the decrease bottle cage function to lessen weight, then run the cable via the bolted courses below the top bottle cage and plug it in.
It contains a small water bottle on the bike and keeps the excessive overall performance (and excessive style) traits that BMC is thought for.
TQ gives their personal app that works with this bike, permitting you to customise settings. You can pair the machine with any ANT+ well suited biking pc to show greater records than the built-in, deliberately minimum show asked through BMC.
BMC has tuned the machine settings to apply complete energy in custom improve mode, and the app helps you to revert to the ones inventory settings in case you begin twiddling with it and do not like your changes.
About that TQ variation expansion…
Range extender battery % and show for BMC Fourstroke AMP LT eMTB
The variety extender is elective, offered one at a time from the bikes, and makes use of an extraordinary battery era than the principle battery in the downtube.
The major battery makes use of excessive-potential cells, permitting greater energy to be packed right into a smaller area. These cells supply energy frivolously till it reaches 10% closing energy, and then it “powers down” itself and binds energy to Eco mode to preserve a greater variety.
This is important due to the fact that because the residual wattage decreases, it’ll be capable of producing decreased energy levels.. However, it is a superb protection that will help you squeeze out a greater variety earlier than the bike goes “analog”.
A variety extender battery makes use of excessive output cells. This lets in it to offer complete energy till it runs out. The purpose is that while you plug it into the bike, it makes use of the variety extender’s energy first, then switches to the principle battery whilst it runs out.
When the bike switches to the principle battery, leaving the auxiliary battery at complete blast till it dies, there may be no distinction in overall performance…it remains at complete energy.
It’s really well worth noting that the variety extender may be plugged into the bike…it has its personal charging port that prices each principle battery and the principle battery through plugging it right into a wall outlet.
The batteries fee withinside the opposite order of ways they had been used, though… The major battery fills first (receives to 80% energy in only ninety mins), after which the variety extender prices.
+The dots at the proper imply the closing fee for the auxiliary battery, the bars are for the principal battery. (It become properly assembled on our journey)
If you are looking to time the entirety, it takes another hour to completely free the remaining 20% of the principle battery, and approximately ninety mins to completely free the variety extender. So, to be safe, permit six hours to make certain the entirety is flawlessly topped.
The Range Extender Battery Kit works with an elective custom Fidlock mount that has a proprietary locking machine that stops unintentional release (and gets rid of any rattling).
Fourstroke AMP LT Weight
+The battery is retrieved across a port under the downtube. It isn’t meant to be modified mid-journey and needs to be left at the bike until a provider is required.
BMC’s intention is to create an e-MTB that rides just like the analog 4 stroke LT. A huge part of this is weight, so the AMP LT has a complete carbon body and makes use of standard (non-e-motormotorcycle specific) components.
And the TQ pressure machine is largely the lightest choice at the market. The whole machine with motor, battery, wiring, far off and show handiest provides approximately 4kg (~8.75lbs) to the bike. A variety extender battery % with cable provides any other ~1kg.
This lets in for a few surprisingly mild standard bike weight to be achieved:
- 4-stroke AMP LT LTD– 15.9kg (~35lb)
- 4-stroke AMP LT One- 16.6kg (~36.6lb)
Weights for fashions and 3 are TBA.
4-stroke AMP LT Cost and Accessibility
BMC Fourstroke AMP LT LTD Sideview
The 4 stroke AMP LT is to be had in 4 sizes (S, M, L, XL) and 7 version.
- The LTD is to be had from December 2022 and is priced at €13,999 / $14,999
- SRAM XX1 Eagle AXS, Praxis Carbon Crank, G2 Ultimate Brakes, Reverb AXS, Fox 34 SC Factory Fork, DT Swiss XRC 1200 Wheels
BMC Fourstroke AMP LT A Side View
- The ONE could be to be had from December 2022 and is priced at €9,999
- The ONE USA is to be had from April 2023 and is priced at $10,999
- SRAM GX Eagle AXS, Praxis Carbon Cranks, G2 RSC Bikes, RockShox SID Select+, BikeYoke Divine Dropper, DT Swiss XRC 1501 Wheels
BMC Fourstroke AMP LT Two Sided View
- The TWO is to be had from February 2023 and costs €7,999
- The TWO USA is to be had from April 2023 and is priced at $8,999
- Shimano SLX w/ Xt Rear Derailleur, SLX Brakes, Praxis Alloy Crank, X-Fusion Manic Dropper, RockShox SID Select+, DT Swiss M1900 Wheels
BMC Fourstroke AMP LT Three aspect view
- All 3 could be to be had from May 2023 and cost €6,899
- The THREE USA would be to be had from July 2023 and is priced at $7,299
- Alex MD30 rims with Shimano SLX/Dior mix, SLX brakes, Praxis alloy cranks, RockShox SID RL, inflexible seatpost, Shimano MT400-collection hubs
The distinction among the United States and Global fashions is the better help speed. All are considered “Class 1” bikes, however in the US which means a 20MPH limit, and withinside the EU and different international locations it is a 25 km/h (15.5mph) limit.