On-One Big Dog SRAM SX Mountain Bike On-One Big Dog SRAM SX Mountain Bike On-One Big Dog SRAM SX Mountain Bike On-One Big Dog SRAM SX Mountain Bike On-One Big Dog SRAM SX Mountain Bike
Frame
Massively adaptable, The Big Dog will instil fun, agility, and confidence to your ride. From the trial centre, to technical singletrack, and on to multi day bikepacking epics, The Big Dog is at home on all. The 65 degree head angle gives confidence on steep chutes. 444mm chainstays for technical stability. The 58mm BB drop keeps rider planted whilst ensuring ground clearance. Balanced stack and slightly longer reach figures offer versatility, from endurance adventures to hardcore hardtail territory. The 75-degree seat tube angle puts you above the crank for better climbing efficiency.
Groupset
SX Eagle
The new SX Eagle is your entry point to the SRAM Eagle Ecosystem. Sharing many features with the rest of the Eagle Ecosystem like the proven SRAM 1x-specific X-HORIZON™ body design, it can accommodate up to 10-50T cassettes. Eagle is a lighter, simpler, more durable, and easier to use drivetrain.
Reliable, wide range, 1x gearing
An 11-50 cassette provides a huge, relible, gearing range with a single 32 tooth crankset utilising DUB technology. Enough range to ensure you can fly downhill or comfortably spin up the steepest climbs.
Level hydraulic brakes
The SRAM Level brake levels the playing field with power and reliability stuffed into a lightweight package. SRAM’s direct link design produces a solid, positive feel the second you squeeze the lever. It offers a no-nonsense solution to give you precise control.
Frame
Massively adaptable, The Big Dog will instil fun, agility, and confidence to your ride. From the trial centre, to technical singletrack, and on to multi day bikepacking epics, The Big Dog is at home on all. The 65 degree head angle gives confidence on steep chutes. 444mm chainstays for technical stability. The 58mm BB drop keeps rider planted whilst ensuring ground clearance. Balanced stack and slightly longer reach figures offer versatility, from endurance adventures to hardcore hardtail territory. The 75-degree seat tube angle puts you above the crank for better climbing efficiency.
Groupset
SX Eagle
The new SX Eagle is your entry point to the SRAM Eagle Ecosystem. Sharing many features with the rest of the Eagle Ecosystem like the proven SRAM 1x-specific X-HORIZON™ body design, it can accommodate up to 10-50T cassettes. Eagle is a lighter, simpler, more durable, and easier to use drivetrain.
Reliable, wide range, 1x gearing
An 11-50 cassette provides a huge, relible, gearing range with a single 32 tooth crankset utilising DUB technology. Enough range to ensure you can fly downhill or comfortably spin up the steepest climbs.
Level hydraulic brakes
The SRAM Level brake levels the playing field with power and reliability stuffed into a lightweight package. SRAM’s direct link design produces a solid, positive feel the second you squeeze the lever. It offers a no-nonsense solution to give you precise control.
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📏 Sizing and Geometry

Rider Height Suggested Frame Size
5′4″ to 5′7″  Small
5′7″ to 5′10″  Medium
5′10″ to 6′1″  Large
6′1″ to 6′3″  X-Large

    SMALL  MED  LRG XLG
A Head Angle (degrees) 65.0 65.0 65.0 65.0
B Head Tube (mm) 100 110 120 135
C Top Tube Effective(mm) 580 615 630 655
D Seat Tube Angle (degrees) 75 75 75 75
E Seat Tube C-T Actual (mm) 380 420 460 500
F Chainstays (mm) 444 444 444 444
G BB Drop (mm) 58 58 58 58
H Stack (mm) 609 619 628 641
I Reach (mm) 415 446 460 480
J Front Centre (mm) 725 762 779 807
K Wheelbase (mm) 1169 1206 1223 1251

🔧 Build Kit

Selcof Forged Alloy Bolt Up Seatclamp V3 / 35mm / 12mm / Black
Bike Build Packaging Rear Derailleur Protector
Selcof Headset Spacer Set / 1 1/8" / 15mm + 10mm + 5mm / Black
Selcof Semi-Integrated Cup Cartridge Bearing Headset

🔧 Groupset

SRAM Level Hydraulic Disc Brake / Rear / 1600mm / 20 Post to IS
SRAM Level Hydraulic Disc Brake / Front / 900mm / Post Mount 20mm Spacers
SRAM SX Eagle Trigger Shifter / 12 Speed Right
SRAM DUB BSA Bottom Bracket / 73mm
SRAM SX Eagle DUB Crankset / 170mm / 32 Tooth / BOOST
SRAM PG-1210 Eagle 12 Speed Cassette / 11-50
SRAM SX Eagle AL Rear Mech / 12 Speed
SRAM Chain PC NX Eagle / 126 Links / 12 Speed
SRAM Centreline Disc Brake Rotor / 160mm 6 Bolt
Avid Centreline Disc Brake Rotor / 180mm 6 Bolt
SRAM Hydraulic Hose Fitting Kit Includes Barb And Olive / Single Barb
SRAM Hydraulic Hose Fitting Kit Includes Barb And Olive / Single Olive

Finance with Newpay and Planet X

You could enjoy a credit limit of up to £5000, and once you’ve bought something, you can choose a payment plan to suit you. It’s super-easy to apply and we’ll even do a no-risk check first to see if you're eligible

Easy Assembly

Assembling your new bike couldn't be easier. Every bike comes expertly packed at least 95% pre assembled, with step by step instructions to get the bike ready to roll. 

So you can get out on that first ride without delay! 

Hand Built in South Yorkshire

All Planet X, On One, Holdsworth and Titus Bikes are expertly hand built to order in South Yorkshire.

Every bike is comprehensively inspected before shipping to ensure your bike is perfect when it arrives at your door.

Not sure on your size? Get Fitted!

Get fitted to your bike at Planet X Headquarters by one of our trained fitters. 

With our Mini Bike Fit, we can advise on sizing, optimise your ride for maximum comfort and efficiency and help you make the right component choices. all for a refundable deposit of £25.

Customer Reviews

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