POLYGON COLLOSUS DH

March 30, 2025

Finally ready to hit the market following great success in our 2025 Downhill Bike Shootout, the Polygon Collosus DH packs incredible performance for a relatively affordable price tag. Based around the IFS-6 platform featured on their Collosus N enduro bike, this big hitting downhill bike serves as a reminder that Polygon is firmly committed to the gravity space.

The Collosus DH isn’t just good value thanks to its parts kit, but boasts a quality alloy frame with well-covered details and useful adjustability built in. Let’s Dissect that frame and talk about what the result is on-trail.

DEVELOPING THE COLLOSUS DH

The Polygon Collosus enduro mountain bike has been on the market for a few years and has proven itself as a solid and capable performer in both human powered and eBike forms. Building on this capability, the Collosus DH packs extra travel and increased stability, with a full 200mm travel and purposeful descending geometry.

Featuring adjustability to make it equally happen between the tape in a downhill race or lapping the bikepark, Polygon’s Collosus DH is designed to satisfy the “gravity lifestyle”, which encompasses all riders looking for a downhill rig.

THE IFS SYSTEM

Polygon’s IFS 6-bar suspension system has been carried on from the Collosus N series, allowing their engineers to obtain the suspension characteristics they were seeking for this hard-hitting 200mm travel gravity bike.

The 6-bar design offered Polygon greater design freedom for the suspension, separating the leverage curve, pedaling character and wheel path. With this, they delivered a progressive suspension system with high levels of bump sensitivity, which retains a neutral braking character and adequate pedaling support.

CUSTOMIZATION FOR ALL DH PREFERENCES

With a wide range of riders falling under the Gravity umbrella – each with their own unique styles and preferences – Polygon wanted to ensure the Collosus DH could be tweaked to offer a riders desired handling characteristics. Adjustability is possible in three areas of the bike: the wheel size; the headset configuration, and a geometry flip chip.

The wheels are supplied in the MX configuration as standard, with the smaller 27.5” rear wheel. However, for riders looking for the ultimate in stability and bump-eating performance, there’s a flip chip to allow for a 29” rear wheel to be fitted without compromising the geometry.

The head tube is a ZS51/ZS59, giving room to add an angle or reach adjusting headset. However, options are currently slim in this fitment.

Finally, a two-position geometry flip chip offers 0.4° head tube angle and 5mm bottom bracket height adjustment.

POLYGON COLLOSUS DH GEOMETRY

The Collosus DH features purposeful descending geometry throughout and immediately felt comfortable once we swung a leg over it in the bike park. The mid-length rear end and moderate figures elsewhere put our crew in a comfortable spot.

TWO QUALITY YET AFFORDABLE BUILD OPTIONS

We’ve been testing the higher spec DH-R / DH9 build, with a price tag of $4,999 yet the spec of a bike that would typically cost considerably more. Sitting below this is the DH-M / DH7 build, which carries over the same quality alloy frame, but with slightly more modest suspension and wheel spec to knock the price down all the way to $3,499.

Both of these builds feature TRP’s DH-R EVO brakes; a SRAM 7-speed DH drivetrain, and quality Race Face Atlas cockpit. Schwalbe’s excellent Tacky Chan tires round out the shared specs, though the Super Gravity casing didn’t quite satisfy our hard-hitting intentions, as we’ll talk about in the ride impressions.

RIDE IMPRESSIONS ON THE POLYGON COLLOSUS DH

Unlike most of our Dissected features, we’ve managed to spend a good amount of time getting familiar with the Polygon Collosus DH, from lapping Whistler Bike Park during Crankworx, to putting the hurt on it at Mt Bachelor for our 2025 Downhill Bike Shootout. Thanks to this we’ve become very familiar with Polygon’s new DH rig, and it’s one of the more memorable and fun bikes we’ve ridden recently.

That IFS-6 rear end delivered some impressive performance, with 30% sag hitting the sweet spot. Even with the smaller 27.5” wheel out back and the stock air-sprung Fox Float X2, the rear end gave no notable spikes of force through the feet on the square edges. Add in the ability to swap out for a coil shock and add an o-chain, and bump eating performance could climb to phenomenal levels.

We were surprised by the Collosus DH’s agility on the trail. The geometry and burly build had us expecting to feel like we were riding a boat, but that didn’t transpire to be the case. Preferring the high setting for the slightly more dynamic ride, we found that the rear end would snap around, and urgent direction changes were made with minimal effort. It’s no mean feat to keep up with world-level Dan Wolfe down the trail, but Drew was able to utilize this surprisingly active ride to react to the trail ahead and just about keep Dan in sight.

Although this is a paid feature, we are sure you will agree that at $4,999, the Collosus DH9’s value proposition would be solid if you were buying it for the parts alone. But add into the mix a frame with solid geometry and buttery smooth suspension, and buying this gravity fiend gets even more attractive. So good was the performance, that Drew even said he’d choose to take the Polygon Collosus DH home above the other bikes in our downhill test, some of which were many thousands more expensive.

If we were to pick a hole in Polygon’s spec selection, we’d say the Super Gravity Schwalbe tire spec was a miss, with the extra protection offered by their Super DH casing being essential to survive pushing this bike close to its limits in the rough terrain it loves. But as a whole, we’re stoked on what Polygon has managed to deliver and think that a wide spectrum of riders are going to enjoy this downhill machine as much as we have.

Visit Polygonbikes.com or Bikesonline.com to learn more and order yours today.