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Reilly Gradient // Adventure Disc



The REILLY GRADIENT is an unprecedented engineering achievement. It combines a hydro-formed 3AL-2.5V titanium tube set, reminiscent of our favourite steel tubing Columbus Spirit HSS, with the adventure frame geometry which Mark Reilly perfected over a 30-year frame building career. Mark's design work on the Gradient was so progressive that its launch pre-dated the whole gravel phenomenon. The Gradient is the embodiment of titanium’s classic ‘flex and flow’, guaranteeing all-day comfort. Whether you’re riding road, gravel, audax, cycle cross, touring or commuting, this is the perfect ‘do-it-all’ bike!

The Builds

We have spent many hours in the saddle considering our perfect setup for the Gradient bikes and we believe the options available meet our riders high demands and ours of course. 

Our Component Choice:

Shimano 2X complete groupsets: We've chosen the components to best match the conditions the Gradient excels in. We only supply complete groupset with matched flat-mount disc brakes. 

Shimano Builds are supplied with 50/34 Compact Chainsets and 11-34 cassettes with Ultegra and 11-32 with 105.

All Shimano builds are supplied with 50/34 Compact Chainsets. 170mm cranks on small, 172.5mm cranks on medium and large, 175mm on extra large. If you want to change these choices just pop it in the order notes. 

Shimano GRX 1 x builds

GRX is Shimano's new Gravel/Adventure Groupset and is long awaited but we now have the 600 series in stock. These come with a 40T front chainring and 11-42 rear cassette.

GRX builds have the choice of Fulcrum racing 900 wheels which are brilliant for the money or of course Hunt Gravel 4 season gravel wheels.

SRAM RED AXS groupsets:

For 2 x choose from 50-37, 48-35 or 46-33T rings, just add your choice in the notes section. This comes with a 10-33T cassette.

For 1x, 40T as standard or 46T, just add your choices in the notes section.

Below are the actual build specifications, the photographs we use may not always show these, but the list below is what will be delivered.

Wheelset and Tyres:

  • Fulcrum Rapid Red 5 gravel wheels are now fitted as standard, tubeless ready.
  • Panaracer Gravel King SK: Designed to give you speed on the road but grip the towpaths and cycle tracks, and toughened with PT protection will keep you puncture free. Tubeless ready 38 to 43c fitted, other sizes available but please call to discuss. 

Bars, Stem, Seatpost and Saddle:

We've specced our Gradient with the best components.

  • Reilly Vector carbon seat post and our lightest yet at 148 grams, supplied with 2 6AL-4V titanium retaining bolts.
  • Reilly Vector titanium RS saddle. Anatomically shaped, a proprietary technology that gives our saddle a sleek finish without a visible seam between the cover and the base. In addition, this innovative technology also ensures a 100% waterproof feature.
  • Deda  Zero 1 handlebars and stem.
  • Reilly chrono headset, for 44mm head tubes, 1 1/8" to 1.5" tapered steerers. Black included as standard but you can choose red, pewter or blue at no extra cost.


Road CC / David Arthur - Fun and capable adventure road bike with great looks to match the great ride. Read the full 5-star review here.

"The Gradient is right at home negotiating narrow tree-lined singletrack with loose corners and steep climbs and would be a good choice if you're looking for a bike to tackle one of the growing number of gravel events like the Dirty Reiver."

Gritcx / Mark Tearle - Where this bike really excels, in my view, is when you point it downwards. Read the full review here

"I want one. I won’t rest until I get one. I know that if this bike was in my shed that, more often than not, it is the bike I would grab more than any others to take me out on adventures. It’s so versatile, so capable and so damned pretty. This is a bicycle that doesn’t ask, it just insists and, well, who am I refuse?"

ADVNTR CC / James Deane - I could tell the Gradient was going to be a fun bike to ride as soon as I saw it. And I was right. here.

"The Gradient is a thoroughly modern ‘go anywhere’ bike. Equally at home on or off road, it will take you anywhere. And it will do it fast! Progressive geometry means the Gradient is capable running both 700c and 650b wheels."

The finished bike exudes a style that makes it look determined yet fast, even when leaning up against a cafe wall.

Frame Features

  • Di2/eps/eTap or mechanical to choice.
  • Clearances for 650b x 50 or 700c x 45 tyres.
  • Designed for up to 50mm tyres and full mudguard clearance even with 50c tyres.
  • Flat mount brakes, with 142mm x 12mm thru axle.
  • Fully equipped with carrier 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 for Chris King inset and Reilly ChronoHeadset.
  • English threaded BB.
  • 31.6mm seat post size.
  • 34.9mm band on front derailleur clamp.
  • REILLY signature black logos/brushed finish as standard.
  • Lifetime warranty, this extends to the original owner only and is non-transferable.

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