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Opus Horizon AL 105-GRX

Opus Horizon AL 105-GRX
  • Color: Army Green
Color: Army Green
Size: Select size
Please select options Unavailable



The Horizon AL 105/GRX takes our proven Horizon geometry to new extremes. A dropped chainstay gives you clearance for 45mm tires and the ability to mount 650B wheels with up to 50mm tires. All that, plus a threaded bottom bracket, take you places you never thought possible. Meanwhile, the rugged alloy frame shoulders heavier loads on multiple mounting points, including on new top tube mounts. On road or no road, traveling light or fully loaded, one bike does it all: the Horizon AL 105/GRX.

- Proven Horizon Progressive Geometry to master all surfaces
- Full carbon fork with triple mounts for bottle or bags
- 11-speed Shimano with GRX rear derailleur
- Big clearance for 700 x 45 tires, can be used with 650B x 50 wheels and tires
- Rear rack and fender mounts, 5 bottle and top tube mounts

bike frame with labeled dimensions
Bike Sizes:
A. Reach 372mm 376mm 380mm 384mm 392mm 400mm
B. Stack 534mm 553mm 572mm 590mm 610mm 630mm
C. Standover 718mm 743mm 766mm 791mm 818mm 847mm
D. Effective Top Tube 515mm 530mm 544mm 559mm 578mm 599mm
E. Head Tube Angle 69.75° 70.5° 71° 71.5° 72° 72.5°
F. Head Tube Length 113mm 133mm 153mm 173mm 193mm 213mm
G. Seat Tube Angle 75° 74.5° 74° 73.5° 73° 72.5°
H. Seat Tube Length 420mm 450mm 480mm 510mm 545mm 580mm
J. Bottom Bracket Drop 80mm 78mm 76mm 74mm 73mm 72mm
O. Chainstay Length 425mm 425mm 427mm 427mm 429mm 429mm
Handlebar Width 380mm 400mm 420mm 420mm 440mm 460mm
Stem Length 70mm 80mm 90mm 100mm 110mm 110mm
Crank Length 165mm 170mm 172mm 172mm 172mm 175mm


Frame Meta 30 aluminum
Fork Full carbon tapered 1-1/2 to 1-1/8 in
Rims Weinmann U28TL
Hubs Alex Bear Pawls through axle 12 mm fr/rr
Tires Kenda Flintridge Pro 700c x 35 CSK
Bottom Bracket FSA sealed BSC threaded
Crankset FSA Omega Adventure
Chainrings 48-32T
Shifters Shimano 105 R7000 2 x 11
Front Derailleur Shimano 105 R7000
Rear Derailleur Shimano GRX-810
Cassette/Freewheel Shimano 11-34
Chain Shimano HG11
Brakes Promax Decode R Flat Mount twin piston disc
Brake Levers Shimano 105 R7000
Handlebars X-Race Aero 16° flare
Tape/Grips Velo VexGel diamond grip
Stem Promax
Headset FSA Orbit integrated sealed
Seatpost Promax alloy 27.2 x 300
Saddle Selle Italia X3 XP Keramid
Pedals Sold separately

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Army Green / X-Small 624316099826 OP-HORAL105GRXARG-XS
Army Green / Small 624316099833 OP-HORAL105GRXARG-S 210000009993
Army Green / Medium 624316099840 OP-HORAL105GRXARG-M 210000009984
Army Green / Large 624316099864 OP-HORAL105GRXARG-L
Army Green / X-Large 624316099871 OP-HORAL105GRXARG-XL