Dirtlab Paratu Review

170 mm of travel, 19.5 kg, and a motor that dishes out full power: the Dirtlab Paratu promises to square the circle. We’ve thrashed the Taiwanese brand’s debut bike on the trails to see whether the “lightweight without compromise” concept actually holds up.

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Visually, the Dirtlab Paratu is a straight-up shot across the bow to the competition. At first glance, you’d hardly peg it as an e-MTB. The slim downtube houses a 400 Wh battery. Down at the BB area sits the revolutionary Maxon Drive Air S motor, which we’ll dive into in detail in a separate feature.

With a frame weight under 3 kg and modern geometry (63° head angle), Dirtlab positions the Paratu as an aggressive enduro that still aims to keep the flickable, poppy feel of a trail bike thanks to its low weight. Until now, that kind of promise has mostly come from light e-MTBs. Is Dirtlab breaking the rules of the game?

Dirtlab Paratu Review
The Dirtlab Paratu might be an underdog, but it brings qualities you won’t find on any other full-power eMTB.
Maxon Drive Air S
It’s as punchy as a Shimano EP801 motor and quieter than TQ’s HPR 60. The Maxon drive Air S lays down a new benchmark in the full-power motor category.
Dirtlab MTB Test
The Dirtlab/Maxon collab puts mountain biking and the outdoor experience front and center—not some arms race for maximum performance.

Versatility as the Bike’s Core DNA

What sets the Paratu apart from a lot of the competition is its extreme adjustability. Reach can be tweaked via the headset in 5 mm increments (which also makes geo tuning for different travel options spot-on), the rear end is ready for either 29-inch or mullet setups (27.5-inch out back), and even the cable routing lets riders choose between headset integration or classic frame ports.

That modularity carries straight through to the suspension, too: the bike is designed to run either 170 mm or more mellow 160 or 150 mm setups. With shocks offering different strokes, you can match rear travel to the fork you’re running. Then use the reach adjustment to dial the geometry for the intended mission.

Most recently, Pivot showcased a similarly universal concept with its new Shuttle LT. And it almost feels like universal approaches are becoming increasingly important for brands—so they don’t end up giving their bike a deal breaker in any one area. Dirtlab gets that and plays this joker very deliberately.

170 mm of travel
170 mm – The RockShox Zeb has enough in the tank to keep charging when the trail gets rough. But the frame is also compatible with lighter 150 mm forks.
Adjustable reach via the headset
Via the headset, you can tweak the reach by +/- 5 mm, letting you fine-tune the geometry for the given fork length.
RockShox Vivid Air
Out back, you can also dial back the travel by running a shock with less stroke.
Zugeverlegung
Cables can be routed through the headset or the classic way along the downtube.
Battery and motor integration
A 400 Wh battery is permanently integrated into the frame. In our test, we also ran the 250 Wh range extender.
Pivot Shuttle LT
Pivot’s most recent Shuttle LT takes a similarly all-rounder approach to Dirtlab.
Versatile eMTBs
The trend is clearly moving toward putting critical decisions in the customers’ hands, so as a manufacturer you don’t end up getting burned.

On the trail: Comfort meets nimble handling

Despite the potent RockShox ZEB Ultimate up front, the Paratu isn’t a no-holds-barred race enduro. The rear-end kinematics are tuned more linear to slightly regressive, which translates into an extremely comfy ride feel. Small chatter and trail buzz get swallowed whole.

If you’re constantly hunting for airtime or ride with a super aggressive style, you’ll want to run Volume Spacers in the shock to add more mid- to end-stroke support when you’re deep in the travel. The shock’s long eye-to-eye (230 mm) and RockShox’s Hydraulic Bottom Out protection keep it from harshly bottoming out at any time. Here, the suspension unit pairs really well with the frame.

Dirtlab Paratu review
The Dirtlab Paratu lives for singletrack — so do we. So we had plenty of overlap in this test.
Rim Protection
The rear suspension kinematics are linear, which keeps things comfy. The Vivid Air shock’s hydraulic bottom-out does a top job, preventing harsh bottom-outs.
Dirtlab Paratu rear suspension kinematics
Sporty riders should run shocks with small air volume, or use volume spacers to bump up end-stroke progression a bit—adding more ramp-up resistance from the shock toward the end of the travel.

Thanks to its low overall weight of 19.5 kg, the bike is easy to pop over root carpets and flick through direction changes—handling you’d normally only expect from much less powerful light e-MTBs. Above all, it’s a ride character that’s downright fun and puts what you want from mountain biking front and center. Because if you’re throwing a leg over a bike with 170 mm of travel, you want to put those adrenaline glands to work.

The Paratu gets it: in this arena, the motor is just a means to an end—getting you back up to the trailhead. And it’s meant to leave the downhill feel as untouched as possible. That works thanks to its low weight, but also its calm, composed nature. Whether it’s assisting or you’re trail-surfing on the way down, you don’t hear a thing. We like that.

Oversized bearings in the rear end and the solid-looking alloy rocker links give the bike the stiffness it needs for the hardcore abuse you’re aiming for with 170 mm of travel. Steering precision is on point at all times.

Dirtlab Paratub Uphill
Steep climbs: no problem for the Dirtlab Paratu
Rear suspension kinematics
The rocker links are generously sized. On the trail, the bike’s stiffness was never in question.
Dirtlab Paratu rear triangle bearings
The rear end runs a Split Pivot positioned directly above the rear axle. This eliminates brake jack while you’re on the trail.

Range and efficiency

In our test, the Paratu with the fixed 400 Wh battery knocked out 1,056 meters of climbing at full gas. That’s a seriously solid number considering the motor is pushing close to 500 watts. For comparison: a Bosch SX with the same battery size manages about 200 vertical meters more, but it also delivers noticeably less punch.

If you’ve got longer rides on the agenda, you’ll want to factor in the 1.6 kg range extender or switch into the efficient mid mode, which still performance-wise sits on par with a Fazua Ride 60. In that setting, range bumps up to roughly 1,300 meters of climbing.

Maxon Drive Air S Range
With its 400 Wh battery and full-power mode, the Dirtlab Paratu isn’t a range monster. Our tip: pick the mid assist level for longer rides.
Maxon Drive Air S Performance
Our test of the maxon Drive air s showed: The mid assist mode is roughly as punchy as a Bosch SX or Fazua Ride 60 at full power.

The competition

Dirtlab is one of the very few brands running the innovative Maxon Drive Air S motor. If you want that motor, you’ll otherwise only find it on bikes from the Swiss brands Thömus and Transalpes, as well as Instinctive.

Other manufacturers have also figured out the recipe of pairing lightweight builds with full-power punch. Standout examples include the Orbea Rise LT, the Cannondale Moterra SL, and the Amflow PL Carbon.

All of these bikes tip the scales under 20 kg and deliver that full-power motor feel. That said, none of them comes with 170 mm of travel, and their motors are noticeably louder. Looked at this way, the Dirtlab Paratu fills a gap that no other manufacturer is covering right now. With a 150 mm fork, Dirtlab even promises a complete bike under 17 kg.

Cannondale Moterra SL
The Cannondale Moterra SL was the first full-power, production eMTB to tip the scales under 20 kg.
Orbea Rise LT
The Rise also cracks the 20 kg mark. Its Achilles’ heel—just like the Cannondale’s: the Shimano EP801 motor has a loud rattle.
Amflow PL Carbon
The shooting star: the Amflow PL Carbon Pro. It tips the scales at under 20 kg, but it’s noticeably louder than the Dirtlab Paratu and also not as gravity- and descent-focused as our test bike.

Distribution and Pricing

Dirtlab is a Taiwanese manufacturer offering the frame including motor and battery for 5990 Euro, shipping worldwide. The company also produces frames for other European brands, and is run in Taiwan by a Dutchman.

Marvin Besselik is currently working on building a dealer network and a central warehouse in Europe, and is open to inquiries from bike shops. The focus is on being able to provide high-quality and fast customer service. And we can back up that focus in the company’s direction: in our case, arranging the test bike swap was completely seamless, handled in German or English, and replies came lightning-fast.

Dirtlab frameset
For now, they’re mainly offering the frameset with shock, motor, and battery for €5,990. Complete builds are expected to follow.

Pro

  • Enormously versatile (geometry & setup)
  • Outstanding handling thanks to low weight
  • Very high-end look and seamless integration
  • High permissible system weight (130 kg)

Cons

  • 400 Wh battery permanently integrated into the frame
  • So far, there’s no broad dealer network in Europe.
  • No complete bikes

Conclusion on the Dirtlab Paratu

The Dirtlab Paratu is the ideal platform for the Maxon drive system. It proves you don’t have to crack the 20-kilo mark to get a 170 mm chassis that’s ready to drop in. This is a bike for riders who do their own thing, looking for an honest, comfy ride feel—and who can’t stand the soundtrack of a motor.

About the author

Ludwig Döhl

... has spent more than 100,000 kilometers in the saddle of over 1000 different mountain bikes. The bottom line from many hours on the trail: mountain bikes are awesome if they match your personal preferences! With this insight, he founded bike-test.com to help bikers find their very own dream bike.

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