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Orbea’s Occam AM OMR updates the able All Mountain (All Mountain=AM) performer to be more willing and more able. The bike still resembles it’s older iteration, but thanks to tweaks in geometry, travel, and wheels, the bike can take on more  and make that more feel less of a challenge, while being more fun.

Orbea didn’t so much as reimagine the Occam AM, but nudge it out in all directions. The travel has been bumped up to 150mm, the wheels are wide 27.5”, the seat angle steepened to 74.5-degrees, the head tube slackened to 66.5-degrees, with a 425mm chainstay, 340mm unsagged bottom bracket height, and more consistent progression in stack and reach from the smallest frame to the largest.

Monocoque frame design for maximum strength and minimal weight. In this case, there are two monocoque parts. The main triangle and the rear end. Both are made from Orbea’s top-shelf ORM carbon: their lightest, stiffest grade. The shaping is extensive, from the tapered 1 1/8” to 1 ½” head tube to the complicated bottom bracket shell sporting a BB92 standard, it’s impossible to find a tube that isn’t worked to be doing as much as possible while weighing as little as possible.

The rear end has some impressive engineering. The carbon UFO seat stays eliminate the pivot at the rear axle, which makes the rear end lighter and stronger. With no pivots, nothing wears out. It also improves lateral stiffness while still offering vertical deflection to soak up the small bumps, so the shock can be left to handle the bigger hits.

The leverage curve of the rear suspension makes it ideal for trail riding. You can set it up to be stiff at the start, then it gets very active on earlier part of the stroke, only to get stiffer at the end.

The Occam AM also features Boost spacing. Boost adds 3mm to the right and left side of the rear axle for a total width of 148mm for the 12mm wide thru-axle, up from the standard 142mm. This also means a chain line moved  out 3mm, and that means that Orbea could also do more with the bottom bracket shell, making it larger, and stronger. The wheels, of course, become laterally stronger as well, thanks to the hub flanges moving out.

In order to both stay with the times and prepare for the future, all the cable routing is internal, including room for cabling a dropper post. On the exterior, the front derailleur mount is easily removed or converted if you prefer a single ring setup.

With all the ingredients together, the resulting brew is one incredible ride. The bike is playful even on the trickiest descents and the climbing doesn’t suffer one bit for it.

The Occam AM OMR, pulled out to go deeper, and insured with 150mm of travel, changes the paradigm for trail riding. It goes over the lines, with deliberate fun in mind.


Occam is updated - AM gets 150/150 travel, TR gets a 130mm fork with beefier stanchions (no more 32) and less-XC spec but stays at 120mm, Occam TR also adds a PLUS model - Info attached


  • Bottom Bracket SRAM
  • Brake Calipers Shimano XT M8000 Hydraulic Disc
  • Brake Levers Shimano
  • Cassette SRAM XG-1275, 10-50
  • Chain SRAM GX Eagle
  • Crankset SRAM X1-1400 Boost, 32t
  • Fork Fox 34 Float Factory 150 FIT4 3-Position Adjustable, QR15x110 Kashima
  • Frame Material Monocoqu OMR Carbon Boost, 12x148
  • Front Derailleur None
  • Handlebar Race Face Aeffect 35, 20mm Rise, 760mm
  • Headset FSA 1 1/8"-1 1/2" Integrated
  • Pedals Not Included
  • Rear Derailleur SRAM GX Eagle
  • Rear Suspension Fox DPX2 Factory 3-Position Adjust Evol Kashima Custom Tune, 210x55mm
  • Rotors Shimano
  • Saddle Selle Italia XR Trail
  • Seatpost Race Face Aeffect Dropper, 31.6mm
  • Shifters SRAM GX Eagle
  • Stem Race Face Aeffect, 35mm Interface
  • Tires Maxxis Ardent, 27.5"X2.4
  • Wheel - Front DT M-1700 Spline TLR
  • Wheel - Rear DT M-1700 Spline TLR


Bike Geometry

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