The trail ends at the bottom of the hill.
On a conventional downhill bike, that usually means the fun stops too. You wait for the lift, load the bike into a pickup, or begin the long push back uphill.
The 4LEAF Rocksoul starts with a different question:
What if a downhill bike could simply turn around and climb back for another run?
That question explains the Rocksoul better than calling it a DH bike, an Enduro bike, or even a conventional eMTB.
It borrows ideas from all three, but fits neatly into none of them.
The aluminum gravity chassis combines a 63° head angle, up to 212 mm of rear-wheel travel, 29-inch or mixed-wheel compatibility, a dropper post and a full-power Bafang drive system.
Depending on the build, Rocksoul can move from a long-travel single-crown freeride machine to a dual-crown electric downhill bike.
More travel, more freedom?
Long travel is easy to understand on a downhill bike.
Pedaling efficiency is not.
Traditional DH bikes make almost no compromise for climbing. Their purpose is to descend as fast as possible. Getting back uphill has always been someone else's problem: a chairlift, shuttle van, pickup truck or a very patient rider.
Rocksoul tries to change that equation.
Its rear suspension can be configured around approximately:
- 190 mm
- 200 mm
- 212 mm
depending on the rear shock setup.
The original suspension analysis shows a strongly progressive leverage curve, dropping from roughly:
4.1 → 2.3
through the suspension travel.
The idea is straightforward. The beginning of the stroke can remain sensitive, while support builds progressively as the impacts become larger.
This is not simply an Enduro bike with an oversized fork.
Gravity geometry at its core
Rocksoul was designed around gravity-oriented dimensions rather than trail-bike geometry.
| Geometry | R2 | R3 |
|---|---|---|
| Reach | 470 mm | 502 mm |
| Stack | 633 mm | 638 mm |
| Wheelbase | 1300 mm | 1335 mm |
| Chainstay | 455 mm | 455 mm |
| Head angle | 63° | 63° |
| Effective seat angle | 76° | 76° |
A 63° head angle and a wheelbase extending to 1335 mm place the Rocksoul firmly in modern gravity-bike territory.
The 455 mm rear center is slightly shorter than some dedicated DH race bikes, giving the platform a balance between high-speed stability and a more active, freeride-oriented rear end.
Yet unlike a conventional downhill bike, Rocksoul was designed to be pedaled.
That is where the suspension system and electric drive begin to matter.
A downhill bike that actually climbs?
It sounds contradictory.
That is exactly the point.
The original Rocksoul concept came from a simple observation: downhill riding is addictive, but access to downhill riding is often difficult.
Bike parks are not everywhere.
Lifts cost money.
Shuttle roads require vehicles and drivers.
For many riders, the nearest proper DH facility may be hours away.
With electric assistance, the access road itself becomes the shuttle.
Rocksoul can be configured with Bafang M510 or M560 drive systems. Current battery options extend to 48 V, 17.4 Ah, approximately 835 Wh.
The motor is not there to make the descent easier.
Its real job starts at the bottom.
Find a fire road, paved climb or manageable access track, ride back to the top, lower the saddle and go again.
That is the core Rocksoul idea: more downhill laps with less dependence on downhill infrastructure.
Dual crown or single crown?
This is one of the more unusual aspects of the platform.
At the gravity-focused end, Rocksoul can be built around a 203 mm FOX 40 Factory dual-crown fork.
For riders who want more steering freedom and a bike closer to Super Enduro or Freeride, the frame can also use a long-travel single-crown fork such as the RockShox ZEB.
The two configurations give the same frame noticeably different intentions.
Dual-crown setup
A dual-crown fork pushes Rocksoul further toward e-DH:
- greater front-end support
- maximum travel
- stronger gravity-bike identity
- better suited to repeated steep and rough descents
Single-crown setup
A long-travel single crown gives up some pure DH character in exchange for:
- greater steering range
- easier maneuverability
- a more versatile freeride setup
- better crossover into long-travel exploration
Rocksoul was designed to support both directions rather than forcing every rider into one configuration.
Why does a downhill-style bike need a dropper post?
For the same reason it needs a motor.
Rocksoul is not supposed to spend its entire life pointing downhill.
The frame was originally designed with approximately 164 mm of usable seatpost insertion depth.
That is shorter than many modern Enduro bikes, but far more than a pure downhill bike actually requires.
The goal is to give the rider a practical seated pedaling position on the climb, then allow the saddle to move down for the descent.
A conventional DH bike assumes somebody else will deal with the climb.
Rocksoul assumes you will.
What the suspension numbers tell us
Travel alone does not make a good gravity bike.
The way the suspension behaves through that travel matters just as much.
Anti-squat
Rocksoul's anti-squat remains relatively high through the early part of the travel before falling progressively deeper into the stroke.
That gives the drivetrain useful support during pedaling and acceleration while reducing its influence when the suspension is dealing with larger impacts.
For a self-shuttle bike, that balance makes sense.
It has to climb, but climbing cannot be allowed to compromise what happens on the way back down.
Anti-rise
The anti-rise curve also begins relatively high and decreases through the travel.
In practical terms, the design aims to provide useful chassis support under braking while allowing the rear suspension more freedom as it moves deeper into the stroke.
Leverage ratio
The strongly progressive leverage curve is one of the clearer characteristics of the platform:
approximately 4.1 at the beginning → approximately 2.3 near full travel
On a bike with up to 212 mm of rear-wheel travel, that progression allows sensitivity early in the stroke while building additional resistance deeper in the travel.
These numbers do not automatically make Rocksoul superior to every DH or Enduro suspension system.
They do show that the bike was designed as a genuine long-travel gravity platform rather than simply being given a longer shock.
Rocksoul specifications
| Item | Rocksoul |
|---|---|
| Frame | Aluminum gravity eMTB frame |
| Suspension layout | Short-link / VPP-style |
| Head angle | 63° |
| Reach | 470 / 502 mm |
| Wheelbase | 1300 / 1335 mm |
| Chainstay | 455 mm |
| Front travel | Up to 203 mm |
| Rear travel | Approx. 190 / 200 / 212 mm |
| Rear shock sizes | 250×65 / 250×70 / 250×75 mm |
| Wheel options | 29-inch / Mullet compatible |
| Motor options | Bafang M510 / M560 |
| Battery | Up to approx. 835 Wh |
| Seatpost insertion | Approx. 164 mm |
| Intended use | DH / Freeride / Super Enduro / self-shuttle gravity riding |
What Rocksoul is not
Rocksoul is not intended to replace every downhill bike.
If you live beside a bike park, ride lifts every weekend and want the purest possible race machine, a dedicated DH bike still makes sense.
A Santa Cruz V10, Trek Session or another purpose-built downhill race bike does not need to compromise for uphill riding.
Rocksoul targets a different rider.
Someone who wants DH-level travel but does not have DH-level infrastructure.
Someone who wants to explore a mountain, climb the access road and descend the technical line.
Someone who enjoys freeride, long-travel Enduro and downhill, but does not want to choose only one.
That is why calling Rocksoul simply an "electric downhill bike" only tells part of the story.
The real value of the motor
A motor does not make you a better downhill rider.
It changes what happens between downhill runs.
Without assistance, another lap may require:
- a lift
- a shuttle vehicle
- a driver
- a push-up track
- or a long climb on a bike that was never designed to climb
With a full-power motor and a large battery, the question changes.
Instead of asking:
"How do I get back to the top?"
the rider can start asking:
"How many more runs can I fit into today?"
That may be the strongest argument for the entire electric downhill category.
Who is the Rocksoul for?
Rocksoul makes the most sense for riders who want:
- gravity-bike geometry
- 190 to 212 mm rear travel
- the option of dual-crown or single-crown forks
- electric self-shuttle capability
- freeride and DH capability from the same platform
- more independence from lifts and shuttle vehicles
Rob:
——"So I ride moto dirt motorcycles so this ebike is LIGHT for me and the long travel suspension and good e-motor carry the weight well…."
It makes less sense for riders who primarily want:
- long-distance trail efficiency
- the lowest possible bike weight
- cross-country riding
- or a dedicated DH race bike used exclusively with lift access
Conclusion
The interesting thing about Rocksoul is not simply that it has a motor and more than 200 mm of suspension.
The interesting thing is what those two things allow the rider to stop depending on.
No lift schedule.
No shuttle vehicle.
No requirement to live beside a bike park.
Rocksoul tries to keep the part of downhill riding people love while reducing one of its biggest barriers: getting back to the top.
It will never be as light or as pure as a conventional downhill race bike.
It is also more specialized than a normal trail eMTB.
That middle ground is not necessarily a weakness.
It may be the whole point.
For riders who want the independence of an eMTB together with the geometry, suspension travel and attitude of a gravity bike, Rocksoul is best described as:
A self-shuttling gravity eMTB.
Strengths and limitations
| Strengths | Limitations |
|---|---|
| Genuine 63° gravity geometry | Heavier than a conventional DH bike |
| 190–212 mm configurable rear travel | More specialized than a normal e-Enduro |
| Dual-crown and single-crown compatibility | Dual-crown builds reduce steering range |
| Full-power self-shuttle capability | Riders with permanent lift access may not need the motor |
| Up to approx. 835 Wh battery | Added battery and motor increase system complexity |
| Progressive suspension kinematics | Not designed as a lightweight trail bike |
| Designed for riders without regular lift access | Pure DH racers may still prefer a dedicated DH platform |