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Sweet spot handling with a classic steel sprung vibe, Big Dog is your 29er trail best friend. Big Dog blends modern 29er geometry with a classic steel ride character to create a smooth rolling, sweetly sprung all rounder with tons of character. Hand welded triple butted steel frame and a big tyre compatible back end guarantee all day comfortable control. Full Description

From £399.99




Hand welded triple butted, gusset reinforced steel main tubes with custom tapered, curved and plated back end for a trail smoothing character with bombproof strength. Balanced 29er handling in four sizes. Stable and confident without being crazy stretched and slack. You want Hello Dave for that.. Threaded BB shell, big clearance chain stay plate Boost bolt through axle and replaceable gear hanger for crash/transport survival.

External cable routing for the smooth, simple operation. Stealth dropper post routing and rear rack mounts for enduro or exploro. Lacquered raw finish for naked build detail appreciation (with eventual cosmetic rat bike rust) or genuinely dayglo paint for ultimate pop.Custom upgrades let you build your ultimate trail best friend for a crazy low cost.


  • Designed for 120-130mm suspension, but works ok with 490-500mm rigid forks.
  • 32t boost chainring is design spec, but larger may fit (tbc).
  • 160mm rear rotor is design spec, but larger may fit (tbc).
  • Headset is EC44 lower cup, ZS44 upper cup.
  • 31.6mm seatpost with 34.9mm clamp
  • 29 x 2.6in tyre maximum
  • 650b x 2.8 fits (just).

Additional Information

Product Code:FROOBD

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Bike frame geometry
AHead Angle (degrees)
B Head Tube (mm)100110120135
C Top Tube Effective(mm)580615630655
D Seat Tube Angle (degrees)75757575
E Seat Tube C-T Actual (mm)380420460500
F Chainstays (mm)444444444444
G BB Drop (mm)58585858
I Stack (mm)609619628641
J Reach (mm)415446460480
K Front Centre (mm)725762779807
M Fork Offset (mm)51515151
O Wheelbase (mm)1169120612231251
P Standover (mm)XXXX


  • Peter L
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    Double buttend 4130 so you get great steel but don't have to pay for reynolds badge (tick). Modern geo with 75 degree seat 65 head angle and good reach(tick). Room for big tyres but still with a screw in 73mm bb so it wont click (tick). Can fit a standard dropper (tick). will only last 25 years (tick) whole frames cost less than the drop outs and axle on my carbon bike (tick). Hard not to like one of these!!

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