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Planet X Bikes

On-One Rujo SRAM Rival 1 Gravel Bike

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Built with aerospace grade chromoly DN6 steel, the On-One Rujo is a custom tubed, fast, and...

Built with aerospace grade chromoly DN6 steel, the On-One Rujo is a custom tubed, fast, and agile gravel fun machine. With optimal strength and fatigue endurance, its timeless looks are built for a lifetime.

  • Triple Butted Custom DN6 Steel
  • SRAM Rival 1 x11 Groupset
  • SRAM Rival Hydraulic Brakes
  • Fulcrum Rapid Red 900 
  • Selcof Monocoque Carbon Fibre Gravel Fork


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On-One Rujo SRAM Rival 1 Gravel Bike From £1,499.99
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Rapidly gaining a cult following, The Rujo is a Triple Butted DN6 Custom Drawn Steel Gravel Wonder. With a terrain smoothing inertia that seems to miraculously magic carpet you over the harshest of surfaces, don’t be surprised when you leave your riding pals for dust. Hourglass shape seatstays and chainstays reduce road buzz and add spring. The arched seat stay bridge reduces harsh feedback and further increasing tyre clearance. A 28.6mm diameter toptube and 34.9mm diameter downtube offer sprightliness and strength alongside a 27.2mm seat post for added comfort. Out front, the custom profile head tube allows for a large weld platform and bigger bearings. Resulting in a stronger, less flexible, and better handling front end without excess stiffness.

SRAM Rival 1

Your needs aren't less demanding, they're different. The SRAM Rival 1 groupset is engineered for smooth, reliable shifting action. Teamed with powerful and reliable hydraulic brakes, Rival 1 will take you where you want to go.

Easy shifting and wide gearing

Rival® 1 is built for 100 percent of what you demand. Forged aluminium crankset and a wide range 11-42 cassette give you great off-road capability and gears that won’t run out on you. Shifters featuring SRAM’s intuitive doubletap technology and improved ergonomics for better finger wrap, ensure ease of use and comfort on long off-road adventures.

Hydraulic disc brakes

SRAM’s Rival 1 delivers effortless, powerful and confident braking in all off-road conditions, meaning more control and less hand fatigue through extended braking sections. Reach adjustable to suit your hand size ensures all important comfort.

Product TypeDefault Component
Bar Tape / Grips

Selcof Soft Touch Handlebar Tape / Black

ForkSelcof Carbon Gravel Fork / Tapered-12mm Thru
FrameOn-One Rujo Gravel Frame / Tyrian Red / Medium
Handle BarSelcof Sterrato V2 Flared Gravel Handlebar / 42cm
SaddleSan Marco Monza Start Saddle / Black / Carbon Steel
StemSelcof Zeta 6061 Alloy Stem / 100mm / 31.8mm / 7 Degree
TyreWTB Nano 700c Wired Tyre / 40mm / Black
Wheel PairFulcrum Rapid Red 900
Bottom BracketSRAM GXP XR Bottom Bracket (With Spacers) / 68/73mm
Frame SpareM5 12mm Stainless Cage Bolt Black
Brake spareAvid Centreline Disc Brake Rotor / 160mm Centrelock
Brake spareSRAM Hydraulic Hose Fitting Kit Includes Barb And Olive / Single Barb
Brake spareSRAM Hydraulic Hose Fitting Kit Includes Barb And Olive / Single Olive
Brake spareSRAM Flat Mount Disc Brake Mounting Hardware / 15mm / Single
CassetteSRAM PG1130 Cassette / 11-42T
ChainSRAM PC1110 11 Speed Chain / 116 Links
Crank SetSRAM Rival 1 GXP Chainset (No BB) / 172.5mm / 42t
Frame SpareStainless Steel M5 Bolt 22mm Thread Locking Individual
Head SetSelcof Carbon Steerer Fork Bung MK 4 / 23-24mm ID
Gear LeversSRAM Rival HRD Hydraulic Disc Brake Caliper & Shifter / Front Brake - Right Shifter 11 Speed / 1000mm / Flat Mount 20mm
Gear LeversSRAM Rival HRD Hydraulic Disc Brake Caliper & Shifter / Rear Brake - Left 1x / 1800mm / Flat Mount 20mm
Head SetSelcof Headset Spacer Set / 1 1/8" / 15mm + 10mm + 5mm / Black
Head SetSelcof SPORT Integrated Cup Angular Contact Cartridge Bearing V2 Headset For Tapered 1" 1/8th – 1.5" Fork Steerer
Rear MechSRAM Rival 1 Rear Mech / Long Cage
Seat ClampSelcof Alloy Bolt Up Seatclamp / 29.8mm
Seat PostSelcof Zeta 6061 Alloy Seatpost / 27.2mm / 350mm
Inner TubePanaracer Inner Tube / 700c / 35-50mm / Presta 48mm


Triple butted custom DN6 steel. Custom hourglass shaped seatstays and chainstays ensure off road comfort. Profiled headtube. Geometry designed around agility and capability. Full luggage and mudguard mounts. Tyre Clearance up to 48mm (700c)



SRAM Rival 1x 11 Speed Groupset 42t front chainring combined with large range 11-42 cassette, perfect for any situation. From high speed flat hardpack to steep and technical ascents. Narrow/wide chainring and a clutch mech to keep your chain secure on any descent.



Fulcrum Rapid Red 900 are designed to cushion blows and deliver superb ride comfort, regardless of the stresses to which it is exposed. Wide rim width inspires confident off-road performance. Tubeless Ready



Selcof monocoque carbon fibre gravel fork. Lightweight, comfortable, responsive. With a 12mm thru axle and full mudguard mounts.

Finishing Kit

Finishing Kit

Selcof finishing kit is used throughout, with comfy soft touch bar tape and a gravel handlebar, providing more comfort and stability offroad.

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