RMU’s Nighttrain is a bike built with two chains. That sentence alone should tell you this isn’t a rebadge job. It’s a 170mm dual-chain enduro bike starting at $4,999, launched July 2026.

RMU (the Colorado ski maker better known for handcrafted planks out of Breckenridge than anything with wheels) officially launched the Nighttrain at Crankworx Whistler on July 27, 2026. It’s their first mountain bike, full stop. And instead of playing it safe with a proven four-bar layout and calling it a day, they went to Dave Weagle, the guy behind DW-link, Delta, and Split Pivot, and came out with a 6-bar linkage that runs two idler pulleys and two separate chains. RMU calls the platform Orion.

This is a first-look, not a trail-tested review. The bike is roughly two weeks old as I write this. But the specs are locked, pricing is live, and Jesse Melamed already raced one to 2nd at the Canadian Open Enduro the day before the official unveiling — so there’s more to work with here than a spec sheet and a press release.

Quick Take

Rear travel	170mm
Fork travel	170mm (Deore/XT Di2) or 190mm (Saint DH)
Wheels	29in front and rear
Frame	6066-T6 aluminum
Suspension	Orion (6-bar, mid-pivot, dual idler, dual chain)
Frame-only	$2,499 (includes Fox Float X2)
Complete builds	$4,999 – $6,999
Best for:	Enduro riders who want a genuinely new suspension feel and don’t mind being on brand-new hardware
Skip if:	You need a dialed service network or a lighter climbing bike
Launched: July 27, 2026 at Crankworx Whistler	RMU Nighttrain

Who Is RMU, and Why Does This Matter

RMU started in 2008 as Rocky Mountain Underground, a handful of friends making skis out of a garage in Frisco, Colorado, trading handcrafted pairs for cases of beer. That’s not brand mythology I’m inventing; it’s the story on RMU’s own site. Almost two decades later they’re employee-owned, headquartered in Breckenridge, and have expanded into Whistler, B.C. and Truckee, California. Both are proper mountain bike towns, not accidents.

That geography matters. A ski brand launching a bike out of a Whistler storefront isn’t the same story as a ski brand launching a bike out of a marketing deck. RMU has had a presence in Whistler since 2020. They’ve watched their own staff ride the local enduro circuit for years before this bike existed.

Still, first-generation hardware from a company with zero mountain bike production history carries real risk. No multi-year track record on frame durability, no established warranty precedent. And no deep dealer network to lean on if something breaks two states from home. RMU is starting at zero on all of that, same as Ducati did entering bikes earlier this year. The brand credibility transfers. The trail credibility doesn’t, automatically.

The Orion Suspension: Why Two Chains?

Here’s the part everyone’s actually talking about.

A dual-idler, dual-chain drivetrain runs the chain from the crank to an idler pulley near the main pivot, then a second chain continues from a separate pulley back to the cassette. Splitting the chain path this way lets the designer decouple chain growth from pedaling torque more precisely than a single-chain idler system can, which is the whole point of routing it through the pivot area in the first place.

Weagle explained the reasoning bluntly in Bikerumor’s launch coverage: “The dual idler design is not a feature, but a solution.” His stated goal was cutting pedal feedback and improving small-to-medium bump compliance deep in the travel, without the chain growth that a single-pivot or shorter-link bike fights on square-edged hits.

There’s an honest wrinkle here: Weagle also said the Orion platform was built as a reusable linkage meant to work across multiple future bike models to spread out development cost, and that “if the Nighttrain was its own project, it may not even feature the dual idler, dual chain design.” In other words, the dual chain isn’t purely a Nighttrain-specific solution to a Nighttrain-specific problem. It’s partly a platform decision that happened to land on this bike first. That doesn’t make it worse. It just means don’t assume every bolt on this suspension was chosen in isolation for enduro riding specifically.

Mechanically, the Orion is a 6-bar, mid-pivot, flex-stay design: no pivot at the rear dropout, which simplifies the linkage but relies on the seatstay flexing slightly to allow travel. RMU’s own product page describes it as delivering “efficient and stable pedaling response” while keeping “exceptional mid-travel square-edged bump compliance,” which is marketing language, sure, but it’s specific marketing language that lines up with what Weagle’s other designs have chased for two decades.

Numbers That Actually Matter

Travel and Forks

170mm of rear travel, paired with a 170mm fork on the Deore and XT Di2 builds (a Marzocchi Super Z on the base build, a Fox Factory 38 on the XT Di2). The Saint DH build swaps to a 190mm Fox Factory 40, which pushes the Nighttrain from enduro bike into bike-park-and-DH-day territory depending how you spec it.

Frame and Wheels

Frame is 6066-T6 aluminum, not carbon: a deliberate choice for a first-generation platform where a manufacturing mistake in a carbon layup is far more expensive to walk back than one in an alloy tube set. 29-inch wheels front and rear, and a 12x157 Superboost rear hub, which the wider spacing accommodates the dual-idler hardware without pinching chainline.

Geometry

Geometry runs aggressive: a 63° head angle paired with a 77.5° seat angle, per Bikerumor’s spec breakdown. That head angle is slack even by modern enduro standards. For comparison, most 160-170mm enduro bikes on the market sit in the 63.5-64.5° range. RMU built this to be stable at speed first and easy to climb second, and the steep seat tube is there to keep the front wheel weighted on the way back up.

Weights by Build

Weights, size S2: 37 lb (16.78kg) for the Deore build, 36 lb (16.32kg) for XT Di2, and 40 lb (18.14kg) for the Saint DH build. None of those are light. A dual-chain drivetrain and a DH-capable frame aren’t a weight-weenie’s pitch, and RMU isn’t pretending otherwise.

RMU Nighttrain Pricing: Where It Actually Lands

Complete Build Pricing

1. Frame only: $2,499. Includes a Fox Float X2 shock, so it’s not a bare frame price the way some competitors quote it.
2. Shimano Deore complete: $4,999. The entry build, Marzocchi Super Z fork, and the heaviest of the three at 37 lb.
3. Shimano XT Di2 complete: $6,999. Wireless XT, Fox Factory 38, and the lightest complete build at 36 lb.
4. Shimano Saint DH complete: $6,499. The park/DH-leaning build with the 190mm Fox 40 and Saint’s DH-specific drivetrain and brakes.

Saint DH vs. XT Di2: Which Is the Better Deal

Notice the Saint DH build is actually cheaper than the XT Di2 build despite the burlier fork. Saint’s mechanical drivetrain costs less than XT’s wireless Di2 group, and that gap shows up directly in the sticker price. If you’re cross-shopping and don’t care about wireless shifting, the Saint DH build is the better dollar-for-spec deal of the three, assuming the 190mm fork and DH gearing suit how you actually ride it.

How the Price Compares to the Market

For context on where that frame-only price sits in the market, Frameworks’ 2026 Enduro and DH frames undercut it at $3,999 for frame-only. Cheaper, but simpler four-bar-adjacent geometry and none of the linkage novelty. The Nighttrain isn’t trying to be the budget option. It’s trying to be the interesting one, and the price reflects that.

Crankworx Whistler: The Launch That Actually Landed

RMU could have announced this bike in a press release and a product photo shoot. Instead they launched it at Crankworx Whistler, and Jesse Melamed rode a Nighttrain to 2nd place in the Canadian Open Enduro the day before the official unveiling, according to Pinkbike’s coverage. That’s not a marketing stunt you can fake: a race result either happens or it doesn’t, and a podium finish on a bike nobody outside the team had ridden yet is the kind of proof point that actually moves skeptical riders.

Canadian Cycling Magazine got a bike in the Whistler bike park shortly after and described the ride quality in terms that track with what Weagle claims: a “planted-but-not-dead feeling” that holds up “no matter how rough the trail gets,” and enough confidence in rock gardens to “huck it at a mess of rocks without really knowing what’s going to happen.” That’s still first-impression territory, not a season of testing, but it’s independent confirmation from someone who isn’t RMU’s own marketing team.

Crankworx Whistler ran July 24 through August 2 this year, and by most accounts the Nighttrain was the story of the festival: a genuinely new suspension platform from a brand nobody expected to build one, at an event usually dominated by the same handful of established gravity brands trading incremental updates.

vs. the Established Enduro Field

The honest comparison for most riders shopping this category isn’t another first-year startup bike. It’s whether the Nighttrain’s novelty is worth trading away a proven platform’s track record.

The Orbea Rallon RS sits in similar travel territory but goes a completely different direction: full electronic integration, motor assist, a bike making ride decisions for you. The Nighttrain is the opposite bet: mechanical, analog, all the complexity concentrated in the linkage rather than the electronics. If you want a bike that thinks for you, look at the Rallon. If you want a bike where the engineering is entirely mechanical and inspectable, the Nighttrain is the one.

On the DH side, the Saint DH build’s Fox 40 puts it in the same fork conversation as RockShox’s 2027 BoXXer and the SRAM DH ecosystem: both proven, both backed by huge service networks, neither with anything close to a dual-chain suspension story. That’s the trade-off in one sentence: the Nighttrain offers something genuinely new in the linkage, and everything else (service network, resale value, long-term parts availability for two idler pulleys instead of one) is unproven by definition.

If you’re the kind of rider who wants to understand exactly how your suspension moves before you buy, the suspension setup fundamentals guide is worth a read before committing to a linkage this unconventional. Sag and rebound basics don’t change with a second chain in the mix, but knowing what “right” feels like on a normal bike first makes it a lot easier to judge whether the Orion platform is actually doing something different or just feels different because it’s new.

What We’re Watching For

A few things will decide whether the Nighttrain becomes a real recommendation once test bikes rack up actual trail hours, not just launch-week impressions:

Idler pulley wear and noise over time. Two pulleys instead of one means twice the wear points and twice the chance of drivetrain slap on square-edge hits. Early ride reports haven’t flagged this, but launch-week demo bikes rarely rack up the hours needed to expose it.

Parts availability for a brand-new platform. If a pulley or idler bearing fails eight months from now, is RMU shipping replacement parts same-week, or is a rider waiting on a small brand’s supply chain? That answer isn’t knowable yet.

Whether the Marzocchi Super Z on the Deore build holds up to 170mm enduro demands. Marzocchi’s recent forks have earned real respect, but pairing a less-established fork with a less-established frame on the entry build is two unknowns stacked on top of each other.

Resale value two years out. First-generation platforms from new manufacturers historically depreciate harder than established brands’ bikes, regardless of how the bike actually rides. That’s a real cost even if the Nighttrain performs exactly as advertised.

Who Should Actually Consider This

Riders near Whistler, Breckenridge, or Truckee who can get hands-on support from RMU directly. Those are literally the three cities RMU operates out of. Being able to walk into a real RMU location if something goes wrong meaningfully de-risks buying a first-year bike from a brand with no bike track record.

Enduro racers who want a genuinely different suspension feel and can stomach some first-adopter risk. Melamed’s result is a real data point, not proof the bike suits every rider, but it says the platform can be raced competitively out of the gate.

Riders who already own RMU ski gear and trust the brand’s build quality from that side of the business. That trust has to transfer somehow, and RMU’s ski reputation for durability is the closest thing to a track record this bike has.

Who Should Skip It

Anyone who needs a dealer network for warranty work outside RMU’s three home markets. If you’re nowhere near Colorado, coastal BC, or the Tahoe area, service logistics on a first-gen platform are a real question mark you shouldn’t ignore.

Riders prioritizing proven long-term durability over suspension novelty. The Frameworks Enduro frame or an established DW-link or Split Pivot bike from a brand with a decade of warranty data behind it is the safer buy if durability certainty matters more than trying something new.

Weight-conscious riders. 36-40 lb across the range is heavy for 170mm travel. If you’re chasing a lighter enduro build, this isn’t where you’ll find it.

The Bottom Line

RMU didn’t ease into mountain bikes with a safe, familiar four-bar platform to build trust first. They went straight to a novel 6-bar, dual-chain design from one of suspension engineering’s most respected names and launched it at Crankworx with a podium result attached. Then they priced it competitively against established gravity brands rather than padding the margin for being new.

That’s a confident first move. Whether it’s the right one depends entirely on how the Orion platform holds up once demo-week bikes turn into six-month-old bikes with real dirt in the pivots. The mechanical story is genuinely interesting: two chains solving a real suspension problem, not two chains for the sake of being different. The unknowns are the ones every first-year platform carries: parts supply, long-term wear, and a service network that’s three storefronts deep instead of three hundred.

We’ll follow up once a Nighttrain has real trail hours on it beyond a Crankworx demo lap. For now: watch the idler wear reports, watch the resale numbers, and don’t let the Weagle name alone make the buying decision for you.

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Specs and pricing sourced from RMU’s official Nighttrain product page and launch coverage from Bikerumor, Pinkbike, and Canadian Cycling Magazine. No test bike has been ridden by our team at time of publication.