InSearchOf Force1X £3,490.00


  1. FilterGreen
  2. ElementGrey


650B OR 29er Dynamo

Pre-order for April '19

InSearchOf Force1X

"..if you are looking to tackle more extreme off-road, while still having the ability to roll along comfortably on tarmac, or if you plan some serious bikepacking expeditions, it lets you go further and more extreme than just about any other drop bar bike."

Pre-Orders available NOW.

This new bike is still firmly in the #FastFar, #ContinentCrushing vein but a progressive new frame and fork design allow it to use 29 x 2.4” or 650b x 2.8 wheels, meaning steeper, rougher and deeper terrain are well within its adventure capabilities.

Multiple mounting points, a bespoke load-bearing mudguard, specific rack systems, 160/180 flat-mount braking and 100mm suspension-ready geometry mean that the InSearchOf, once again, does not shy away from the ‘Progressive’ word in our title.

Complete builds with 'The Search' Dynamo Wheelset are +£160





  • Unique HotShoe 160/180mm flat-mount braking system.
  • Blend of Custom-formed, Progressive-butted, Dedacciai ‘Zero’ and Reynolds 853 steel tubing.
  • This bike is available with the specially developed Mason x Hunt The Search Dynamo wheelset as shown, or the back-country ready HUNT TrailWide 27.5" wheels.
  • For seriously long solo rides into the unknown: 29 x 2.4" 'The Search' wheelset spec'd with WTB Ranger 2.4" and optional Tan-walls.
  • Lightweight and dependable SRAM Force 1X Groupset with matching TruvAtiv Carbon 34T crankset
  • Precisely engineered 10-42T wide range cassette.
  • Extended MTB milage over rugged trails and dire conditions: 27.5 TrailWide spec'd with WTB Ranger 2.8" tyres.
  • Adventure-specific Ritchey VentureMax WCS 'bars optimise comfort over long distances, load capacity and control over rough terrain.
  • UK designed, Fabric saddles and bar tape.
  • Fully and discretely eyeletted for racks.
  • Carbon Mason Penta 31.6mm Microadjust 'post and Mason Macro 'clamp.
  • ‘Anything Cage‘ style bosses on-top-of and underneath Down Tube.
  • Can be fitted with a wide selection of WTB or Schwalbe Tyres. Please contact us for details.
  • Unique Mason MultiPort adaptable internal routing.
  • HotShoe Fork: Designed by MASON exclusively for ISO. Featuring ‘Tri-Mount’ crown system for use with a range of modular accessories. Internally routed for dynamo light systems and eyletted for rack and muguards.
  • Comes with 'Shutter' Mudguard; designed to provide effective coverage from dirt & debris when riding at speed and in mud.



Our frame sets deserve the best components, so we put a great deal of thought into the mix of parts used for each bike build. Bars, stem and crankset are sized to match frame size choice. See Geometry chart for component sizing.

Frame Blend of Custom-formed Progressive-butted Dedacciai ‘Zero’ and Reynolds 853 steel tubeset.
Fork Mason 'HotShoe' ThruAxle, 180/160 FlatMount, carbon fork.
Headset DEDA Low profile, integrated headset.
Colours FIlterGreen. ElementGrey.
Bike Weight 50cm - 12kg.
Sizes 42, 46, 50, 54, 58.
Shifting SRAM Force 1X HRD.
Chainset TruvAtiv Stylo/Descendant Carbon DUB, 34T.
Cassette SRAM XG-1175 10-42T.
Chain SRAM Force PC1170.
Braking SRAM Force HRD F180/R160 FlatMount.
Tyres WTB Ranger: 27.5 x 2.8" / 29 x 2.4" Tan Wall.
Wheels Mason X HUNT 'The Search Dynamo' 29 Boost wheelset / HUNT TrailWide 27.5 Boost.
Handlebar Ritchey VentureMax WCS.
Clamp Mason Macro 34.1mm ultra-light.
Seatpost Mason Penta 31.6mm Carbon.
Saddle Fabric Scoop Elite Alloy.
Bar Tape Fabric Hex Black.
Stem Ritchey WCS Trail.