Knolly Delirium

With 180mm of travel, slack, adjustable geometry and Knolly’s patented FOURby4 suspension, the Knolly Delirium is a fully capable downhill bike with enduro weight and pedaling ability.

Sometimes you need more. Sometimes you just want more. Either way, the Knolly Delirium delivers. Designed for rugged versatility on the gnarliest trails, the Delirium defies categorization. Freeride, DH, park or even aggressive trail riding – with a 180mm fork, 170mm in the rear and adjustable geometry on top of 27.5 wheels, the Knolly Delirium handles it all with confidence and finesse. The slack, aggressive geometry, deep travel and Knolly’s patented FOURby4 suspension system means you’ll have to work hard to make sure your Delirium gets the daily serving of rocks and roots it needs to stay happy.

The Knolly Delirium is perfect for lift-assisted riding at Deer Valley Bike Park. Whether you’re riding old school DH gnar or jump/flow trails, the Delirium’s low center of gravity and slack geometry give you confidence in rock gardens, steep tech and in the air. Big mountain backcountry riders love the Delirium, too. The 75° seat tube angle, reasonable weight (33.3 pounds actual weight for one of our SRAM X1-spec medium bikes with a Thomson dropper post and no pedals) and unmatched traction mean it pedals, too. In fact, we know people that choose the Delirium as their sole, all-mountain quiver-killer bike.

Knolly Delirium Frame

Good old aluminum – it may not be as glamorous or light as carbon fiber but it’s 100% proven and stone cold reliable. Although Knolly does make carbon bikes, they’re still committed to aluminum as a premium frame building material:

“With our extensive aluminum manufacturing experience, we can make an aluminum frame that convincingly outperforms an average carbon frame (i.e. the majority of carbon mountain bike frames on the market).”

In other words, aluminum isn’t just a price-point frame material – especially not when we’re talking about Knolly bikes. Most high-end aluminum mountain bike frames are made from 6061 aluminum alloy but Knolly turned the Delirium up to 11 with stronger, longer-lasting 6066 aluminum. 6066 aluminum is a bit heavier and harder to work with but thanks to careful design and extensive hydroform shaping, the Delirium has an outstanding strength to weight ratio with a frame weight of just 8.5 pounds. That’s impressive for a 170mm-travel aluminum freeride / DH frame designed to withstand legitimate bike park and downhill abuse.

Knolly is renowned for their attention to detail and the Delirium frame is no exception. From finish to hardware choice, nothing has been overlooked. The bottom bracket is threaded for easy servicing and reliability and Knolly gives you a choice of internal or external cable routing. The suspension linkage is above and beyond with custom-machined titanium pivot bolts and velvety-smooth, durable dual-row angular contact bearings for the main pivots.

Knolly Delirium FOURby4 Suspension

The cornerstone of Knolly Bikes and the main thing that sets them apart from other bikes is the patented FOURby4 Suspension system. All of their bikes are designed around this carefully engineered system, which balances pedaling performance, traction, braking and shock control for outstanding traction and plush, linear shock performance. If you like trail bikes with silky smooth suspension and Velcro traction, then look no further. It doesn’t get any better than Knolly.

Based on Formula One strut suspension, Knolly’s FOURby4 Suspension system uses two rocker links to separate wheel path from shock actuation and deliver superior traction. Whether you’re pedaling on flat ground, diving through slippery roots, cornering or descending through rocky chunder, Knolly’s FOURby4 Suspension keeps the rear wheel glued to the ground so you stay in control and keep moving. And as long as you’ve got the legs, you can pedal it up nearly anything.

To learn more, visit the Knolly FOURby4 Suspension page.

Knolly Delirium – The Bottom Line

Everyone has their own idea of the perfect quiver-killer bike. But if you’re a gravity-oriented rider who likes slack, long travel bikes and is willing to pedal to get the goods, then the Knolly Delirium was designed for you. The no-compromise suspension, aggressive geometry and killer traction make it great for the bike park, alpine adventure rides and Southern Utah slickrock trips.

Knolly Delirium – Where it Fits

The Knolly Delirium lives at the far end of the gravity spectrum. Within the Park City Bike Demos fleet, it falls between the Devinci Wilson dedicated downhill bike and our all-mountain / enduro bikes, the Devinci Spartan and Knolly Warden Carbon.

To see how the Knolly Delirium fits in with our entire bike lineup, check out our Mountain Bike Guide.

Specs shown are for the Knolly Delirium SRAM X1 1×11 kit we have in our demo-rental fleet. To see other variations, click on the Pricing tab.

Drivetrain: SRAM X1 1×11 with 30T chainring, 10-42T SRAM XG cassette and Race Face Chester 170mm aluminum crankset
Wheels: 27.5 Spank Spike Race 33
Tires: Maxxis 2.3 Minion DHF 3C/EXO/TR front and 2.3 Maxxis High Roller II 3C/EXO/TR rear
Sizes: SM, MD, LG, XL
Finish: Black-Blue or Orange-White
Weight (actual): 33.3 lbs / 15.1 kg (actual weight of size medium with Thomson dropper seat post and no pedals)
Frame: 6066 hydroformed aluminum with internal or external cable routing, ISCG05 chain guide tabs, adjustable geometry, 73mm threaded bottom bracket, uninterrupted seat tube and 142×12 axle spacing
Fork: 180mm RockShox Lyrik RC
Rear Suspension Travel: 170mm / 6.7″
Shock: Cane Creek DBA-CS air
Brakes: Shimano Zee hydraulic disc brakes with 200mm front rotor and 180mm rear rotor
Rear Derailleur: SRAM X1 11-speed
Front Derailleur: None: 1×11 shifting
Chain Guide: MRP AMg 30-34T alloy
Shifters: SRAM GX
Stem: Spank Spike 50mm with 0° rise
Handlebar: 800mm Spank Spike Vibrocore
Seatpost: Race Face Ride. Thomsen Covert Dropper upgrade available for $300.
Saddle: Chromag Lynx DT
Headset: Cane Creek “40” series, Zero Stack 44/56
Grips: Spank Spoon
Your Height Recommended Frame Size Frame Seat-Tube
5′-5’7 SM 14.7″
5’7-5’11 M 16.5″
5’11-6’2 L 18.7″
6’3+ XL 20.3″

Sizing recommendations are approximate and a fitting session is recommended for best fit.

Size SM (14.7″/ 373mm) MD (16.5″/ 418mm) LG (18.7″/ 475mm) XL (20.3″/ 515mm)
Virtual TT 23.2 in. / 590mm 24.3 in. / 618mm 25.4 in. / 645mm 26.1 in. / 662mm
Seat Tube Length 14.7 in. / 373mm 16.5 in. / 418mm 18.7 in. / 475mm 20.3 in. / 515mm
Seat Post 31.6mm 31.6mm 31.6mm 31.6mm
Head Tube Length 4.1 in. / 104mm 4.3 in. / 110mm 4.3 in. / 110mm 4.6 in. / 118mm
Head Angle* 65° / 64.25° 65° / 64.25° 65° / 64.25° 65° / 64.25°
Seat Angle* 75° / 74° 75° / 74° 75° / 74° 75° / 74°
Bottom-Bracket Height (High)* 13.9 in. / 354mm 13.9 in. / 354mm 13.9 in. / 354mm 13.9 in. / 354mm
Bottom-Bracket Height (Low)* 13.6 in. / 345mm 13.6 in. / 345mm 13.6 in. / 345mm 13.6 in. / 345mm
Chainstay Length 16.9 in. / 429mm 16.9 in. / 429mm 16.9 in. / 429mm 16.9 in. / 429mm
Stack Height 23 in. / 584mm 23.2 in. / 589mm 23.2 in. / 589mm 23.5 in. / 597mm
Reach Length 16.5 in. / 419.5mm 17.6 in. / 446.5mm 18.6 in. / 473mm 19.2 in. / 488mm
Standover Height 27.7 in. / 704mm 28.6 in. / 727mm 30 in. / 762mm 31 in. / 787mm
Wheelbase 45.9 in. / 1165.5mm 47 in. / 1194.5mm 48.1 in. / 1221.5mm 48.8 in. / 1240mm

*The dual geometry specs for Stack, Reach, Head Angle and Seat Angle are thanks to the Delirium’s adjustable geometry.

All specifications subject to change.

Ask us about other rear shock options. The shock listed is the base option for the Knolly Delirium.

Mountain Bike Drivetrain Fork Shock Wheels Price
Knolly Delirium SRAM XO1 Eagle 1×12 Fox 36 Float Factory HSC/LSC Kashima Cane Creek DB Air CS Spank Spike Race 33 $7,397
Knolly Delirium SRAM XO1 1×11 Fox 36 Float Factory HSC/LSC Kashima Cane Creek DB Air CS Spank Spike Race 33 $6,921
Knolly Delirium* SRAM X1 1×11 RockShox Lyrik RC Cane Creek DB Air CS Spank Spike Race 33 $5,611

*This build does not include a dropper seatpost. A Thomsen Covert dropper upgrade is available for $300.

Full Day Rental

$ 99

Afternoon Rental

$ 75

Knolly Delirium Videos

Video of the Knolly Delirium all-mountain / freeride bike in action.Video of the Knolly Delirium all-mountain / freeride bike in action.

Kevin Waterbury introduces the Knolly Delirium all-mountain / freeride bike at Eurobike 2015.Kevin Waterbury introduces the Knolly Delirium all-mountain / freeride bike at Eurobike 2015.

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Knolly Delirium Anatomy