The monster truck of Knolly's fleet - the Delirium is a bike that truly cares not what you point it down. A massively over-built frame, 170mm travel, and super aggressive geometry come together to make this bike quite a wild ride. Dropping in on your next big-mountain line in BC? Sessioning the bike park all day long? The Delirium delivers the goods, and surprise surprise, you can even climb it back up the hill should there be no chairlift or shuttle truck present.
As with all Knolly bikes, the suspension platform is one of the main attributing factors to the overall ride quality. Many smaller boutique companies choose to license an existing suspension platform to cut down on research and development costs. The CEO of Knolly, Noel Buckley, just happens to be an engineering/suspension wizard, so it should come as no surprise that he has developed an exclusive patented suspension platform called Four by 4. This is not to be confused with the generic 4-Bar linkage term used on many other full suspension bikes out there. Knolly’s Four by 4 is truly something special, with little compromise - and you won’t find it on any other bike brand as it is exclusive to Knolly.
But what’s with all that linkage? Certainly a question that comes up frequently. Yes, it is true that Knolly bikes employ an impressive number of pivots and parts. Rest-assured, this was not an afterthought. Each of those pivot points are strategically placed, and every single detail of this platform has a purpose. Us mountain bikers are a tough bunch to impress. We want our mountain bikes to climb well, descend like a monster, hold momentum over chatter, maintain composure under braking forces, and of course, provide loads of traction. It’s the ultimate challenge for engineers to strike some sort of balance between these factors. Inspired by Formula One auto racing strut-style suspension, Knolly’s Four by 4 suspension technology provides freedom in design and execution that few other platforms can match. This allows Noel to tweak the Delirium from the ground up, manipulating wheel path and shock progression completely independently. This leads to a naturally linear-to-progressive suspension rate curve, which is important because it means your shock doesn’t have to to the hard work to provide bottoming resistance, as it would on a bike with a falling rate curve. Ultimately, this means less wear-and-tear on your rear shock, which also means less heat generated. As we all know, heat buildup in a rear shock is no good, and leads to quickly degraded suspension feel. You’ll also find that service intervals on your rear shock may be less frequent compared to other bikes you’ve owned in the past. The outermost pivot locations are all strategically placed in low stress locations, and rotate on long-lasting IGUS bushings. The main pivots rotate on super high quality angular contact cartridge bearings.
Knolly bikes have always been known to climb impressively well, and while we're not going to give you false hopes that the Delirium is magically a fantastic climbing bike, it does manage to get the job done. Keep in mind, the Delirium is very much a gravity-oriented bike, but the folks at Knolly know that occasionally, we all need to climb to the top to get back down. You'll find the Delirium has the same 75-degree, full-length seat tube angle found on their shorter-travel trail bikes. The seat angle puts you in a comfortable climbing position with the seatpost extended, and the full-length seat tube allows you to stuff a relatively long dropper post in there should you so desire. With the Four by 4 linkage, Knolly is able to provide exceptionally smooth pedaling characteristics with little feedback. The stock Fox Float X2 does employ a climb switch, which also helps limit excess suspension activity when climbing. Under heavy braking, the Warden maintains traction and a fully active suspension feel. There is very little, if any, brake-induced suspension lockup, and no brake jack.
So we know Knolly has it dialed in the suspension department, but geometry is also equally important. For a bike that's intended to be thrown down near-vertical pitches, it makes perfect sense that the Delirium is sporting slack, long, and low geometry. Adding to the versatility of this bike, the Delirium utilizes adjustable geometry, allowing you to jump between two main settings. These two settings will adjust your head angle, bottom bracket height, and seat tube angle. The full geometry chart can be viewed below if you’d like to see exact numbers. Both single crown and dual crown forks are approved on the Delirium. Most folks tend to go with a 170mm or 180mm single crown, or for more rigorous DH/park riding, a 200mm dual crown fork.
The Delirium is built to accommodate 1X drivetrains - there is no front derailleur mount. No surprise there - we really don't see the need for front derailleurs on any kind of bike with today's excellent 1X drivetrain options. As we noted earlier, the Delirium has a full-length seat tube, which allows for the use of 175mm and even 200mm dropper posts from some riders. Smaller riders can usually get away with a 150mm dropper post. This is typically not possible on bikes with interrupted seat tube designs. As with all Knolly bikes, the tire clearance on the Warden is huge - up to 2.6” fits with no issues.
The folks at Knolly know that their customers ride bikes often and HARD. Every last detail of their bikes are engineered and built to last, so it should come as no surprise that Knolly offers a limited lifetime warranty on all of their bikes. Rest-assured, your investment is safe with a Knolly.
- Wheel Size: 27.5"
- Frame Material: Aluminum
- Rear Shock: Fox Float X2 2-Pos Factory
- Rear Shock Hardware Size: M8x21.8mm Top / M8x33mm Bottom
- Rear Susp. Travel: 170mm
- Rear Shock Size: 216mm x 63mm (8.5" x 2.5")
- Rear Axle Standard: 12x142mm
- ISCG Tabs: I-'05
- BB Standard: 73mm BSA
- Front Der. Mount: No
- Seat Post Dia: 31.6mm
- Seat Clamp Dia: 35mm
- Headset Standard :ZS44mm / ZS56mm
- Rear Brake Mount: IS-160mm
- Water Bottle Mounts: One
- Intended Use: Enduro/Park/DH
- Warranty: Limited Lifetime