• £2,999.00
    Unit price per 
Tax included.


The REILLY GRADIENT STL is quite simply our best-selling Gradient adventure bike rendered in steel. It benefits from Mark Reilly's progressive geometry, but with the option of making personalized tweaks to tube and stay length as your frame will be custom built in the UK. You'll also have the option to choose a bespoke paint finish. The price quoted is for a single colour, but custom paintworks can be costed.  

The frame will be handcrafted in Columbus Life tubing by long-time Reilly collaborator Adrian Parry. This steel frame honours our frame building roots, while the sophisticated geometry offers high performance and handling no matter how extreme the terrain. Steel is real and your Gradient STL promises to power you on your next adventure, whether on the open road or your local gravel trail.

 Frameset Features

  • Di2 or mechanical to choice.
  • Clearance for 650b x 47/50 or 700c x 44 tyres.
  • Flat mount brakes, with 142mm x 12mm thru axle.
  • Fully equipped with rack mounts and mudguard fixings as standard.
  • 3 sets of bottle cage fittings with 3rd bottle cage bosses on the underside of the down tube designed to work perfectly with tool kegs.
  • CNC 44mm head tube compatible with Reilly, Hope or Chris King headsets.
  • English threaded BB.
  • 27.2mm seat post size.
  • Carbon fork with 2x3 boss mounts, painted to match.
  • Reilly headset included. Black as standard, but also available in red or blue at no extra cost.
  • FAQ's

Rider Height vs Frame Sizing

Rider Height (Ft/in) Rider Height (Metres) Suggested Frame Size
5'1" to 5'4" 1.55m to 1.63m EXTRA EXTRA SMALL
5'3" to 5'6" 1.60m to 1.68m EXTRA SMALL
5'5" to 5'8" 1.65m to 1.73m SMALL
5'7" to 6'0" 1.70m to 1.83m MEDIUM
5'11" to 6'2" 1.80m to 1.88m LARGE
6'1" to 6'4" 1.85m to 1.93m EXTRA LARGE
6'3" to 6'6" 1.91m to 1.98m EXTRA EXTRA LARGE

Frame Sizing

SEAT TUBE C/TOP 460MM 470MM 490MM 510MM 530MM 550MM 570MM
TOP TUBE VIRTUAL 500MM 520MM 540MM 550MM 570MM 590MM 605MM
BB HEIGHT 275MM 275MM 275MM 275MM 275MM 275MM 275MM
CHAINSTAY LENGTH 430MM 430MM 430MM 430MM 430MM 430MM 430MM
SEAT TUBE ANGLE 76 76 75 74 73.5 73 73
HEAD TUBE ANGLE 69.5 70.5 71 71.5 72 72 72
FORK RAKE 47MM 47MM 47MM 47MM 47MM 47MM 47MM
HEAD TUBE 100MM 100MM 120MM 135MM 155MM 175MM 195MM
AXLE TO CROWN 400MM 400MM 400MM 400MM 400MM 400MM 400MM
STACK 527MM 531MM 552MM 568MM 589MM 608MM 626MM
REACH 369MM 388MM 392MM 387MM 396MM 404MM 413MM
WHEELBASE 1014MM 1025MM 1032MM 1028MM 1038MM 1053MM 1068MM
FRONT CENTRE 594MM 605MM 612MM 607MM 618MM 632MM 647MM