Tyaughton Steel

  • 150
  • 29
Photo by Brayden Rastad

Introducing the Tyaughton: our new 29’ hardtail comes in steel, can run a 150mm or 160mm fork, features advanced geometry and incorporates an unapologetically high level of construction with fully custom tubing. The Tyaughton is everything you need for a super capable and playful hardtail trail bike.

Tyaughton Steel
Tyaughton Steel
Tyaughton Steel
Tyaughton Steel

Tyaughton Steel

  • 150
  • 29


Standard GX spec unavailable until October.

Please keep in mind that global shipping is still very unpredictable and all delivery dates are approximate.

If you have any questions, contact us - info@knollybikes.com.

Bikes ship unassembled. Spec is subject to change due to supply chain challenges.

Please note: All orders are processed in USD.

Colour 510 Green

Only left in stock


We chose air hardened steel because it’s malleable which allows us to craft the tubing to the exact spec’s we need. It’s also heat treated to give high strength and durability. We also apply an ED anti-corrosion coating on all our tubes so that the Tyaughton is ready for all weather conditions.

Progressive Geometry

The Tyaughton’s geometry has been designed from the ground up: we’ve utilized our extensive knowledge from our full suspension line-up to ensure that this bike rides as competently as our suspension models while still being incredibly balanced across all types of terrain. While conceived as an “all around, do everything bike”, the Tyaughton is extremely progressive and suited both to big days in the saddle as well as shredding your local trails.

The Tyaughton features a 64.5 degree head angle with a 150mm fork (or a 64 degree head angle with a 160mm fork) which makes it capable on both technical uptracks and steep descents. The seat tube angle is ideally positioned at 75 degrees to deliver an efficient climbing position while also ensuring that the rider’s hands and knees are comfortable during epic days. The front end of the bike is long to increase room in the cockpit and allow the rider to stretch out. The chainstay is modest at 427mm, blending stability and maneuverability. It’s long enough to give the bike optimum balance across its wheelbase but short enough to get out of your way when you need to get the front end of the bike up. The back end of the bike is engineered for compliance and delivers a supple ride.

Custom Tubing

The Tyaughton Steel features a frame size specific butted, bent and formed tubeset that blends production level repeatability and precision with a craftsmen level of manufacturing.
It features a size specific tubeset (small frames don’t get the same tubes as the XL and vice versa) and incorporates many of the titanium frame features including integrated ISCG05 chain guide tabs and a unique head tube.

In addition, both Steel and Titanium frames have a unique head tube shape designed to maximize strength to support forks up to 170mm. Tubesets flow into custom CNC machined dropouts, yokes and access ports (Titanium-only) so that stress risers are minimized. Even the included ISCG mount attaches cleanly into a recessed CNC machined pocket on the chainstay yoke.


We feature 157Trail rear hub spacing which uses the wide flange 157 hubs with 73mm BB shells. This spacing provides the most options for tire size and can easily clear tire widths up to 2.6. With 157Trail, heel clearance is exceptional and chainring clearance remains huge at 36T.

Human Centric Sizing

We have always believed in human centric sizing and design our bikes to deliver optimal reach, standover height and geometry for a broad range of riders.


S 155cm - 170cm
M 170cm - 178cm
L 178cm - 188cm
XL 188cm - 195cm



Small Medium Large X-Large
Head Tube Length 102 110 115 125
Stand Over Height 669 725 750 790
Seat Tube Length 360 404 456 506
Wheelbase Length 1190 1221 1250 1281
Stack 632 636 640 652
Reach 441 468 495 522


Head Angle 64.5º
Seat Tube Angle (Effective) 75º
BB Height 323
Chainstay Length 427



Front Travel 150mm Nominal. Intended use: 140-160mm. Min / Max: 130mm-180mm
Wheel size and max width 29" x 2.6" or 27.5" x 2.8"-3.0"
Dropout/Hub Spec 12 x 157mm
Seat post diameter 31.6mm
Seat post insert depth 300mm+
Dropper post range Size Small & Medium: 175mm drop; Size Large and XL 175mm - 210+mm drop
Head set 44mm upper & 56mm lower
Post collar 35mm
Frame material Steel
Chainguide Tabs ISCG-05 (removable)
BB Shell Spec 73mm / threaded
Chainline 54-57mm with 55-56.5mm optimal
Rear Brake Tabs Post mount 160mm
Bottle mounts Yes

Build Kits





Fork Marzocchi Z1 29” 150mm 42mm Offset RockShox Lyrik 29" Ultimate RC2 150mm, 42mm Offset Fox Float 36 29" Grip2 Factory 150mm, 44mm offset
Headset Orbit 1.5 ZS Internal Headset FSA Orbit ZS44/56 FSA Orbit ZS44/56
Stem RaceFace Aeffect R 35, 50mm Spank 35mm x 40mm RaceFace Aeffect R 35mm x 50mm
Handlebar Spank 35mm x 800mm, 25mm Rise Spank 35mm x 800mm, 25mm Rise RaceFace Next R 35mm x 800mm, 20mm Rise
Grips Spank / SDG Spank / SDG Chromag Basis Black
Brake SRAM Guide RE Magura MT5 Shimano XT 4 Piston M8120
Rotors SRAM Centerline 200mm / 180mm Magura Storm HC 203mm / 180mm Shimano XT 203mm / 180mm (6-Bolt) SM-RT76
Shifter SRAM NX Eagle SRAM GX Eagle Shimano XT 12spd M8100 (I-Spec EV)
Seat Post SDG Tellis 170mm SDG Tellis 170mm, 31.6, 31.6 SDG Tellis 170mm, 31.6
Seat Collar Knolly Knolly Knolly
Saddle SDG Bel-Air V3 SDG Bel-Air V3 Chromag Lynx DT
Crankset SRAM Descendant 170mm 30T Ring SRAM GX Eagle 170 32T Ring Shimano XT M8130 30T, 170mm
Bottom Bracket SRAM DUB BSA SB+ SRAM DUB BSA SB+ Shimano XT MT800 BSA, threaded
Derailleur SRAM NX Eagle SRAM GX Eagle Shimano XT M8100 12spd, Shadow Plus
Cassette SRAM XG1275 Eagle 10-50T SRAM XG1275 Eagle 10-52T Shimano XT M8100 12spd, 10-51T, Hyperglide+
Chain SRAM GX Eagle SRAM GX Eagle Shimano XT M8100
Wheelset Spank Oozy Trail 345 HEX 32h J-Bend, 29" 15x110 / 12x157 Spank Oozy Trail 345 HEX 32h J-Bend, 29" 15x110 / 12x157 Spank Oozy Trail 345 HEX 32h J-Bend, 29" 15x110 / 12x157
Front Tire Maxxis DHF 29" 2.5" 3C Maxx Terra EXO Maxxis DHF 29" 2.5" 3C Maxx Terra EXO Maxxis DHF 29" 2.5" 3C Maxx Terra EXO
Rear Tire Maxxis DHR2 29" 2.3" 3C EXO Maxxis DHR2 29" 2.3" 3C Maxx Terra EXO Maxxis DHR2 29" 2.3" 3C Maxx Terra EXO


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