Opus BIG CITY 2025
2025 Urban
Estimate price |
651$
Weight | 11.88 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Groupset Altus -
Suspension Rigid -
Drivetrain 3 × 9 -
Brakes Shimano Hydraulic Disc
Sizing
Recommended size guide.
XS
156cm - 166cm
SM
163cm - 174cm
MD
171cm - 182cm
LG
179cm - 189cm
XL
185cm - 195cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Alloy frame and fork
Suspension Fork
Aluminum tapered 1-1/4 to 1-1/8 in
Drivetrain
Rear Derailleur
Shimano Altus
Front Derailleur
Shimano Altus
Shift Levers
Shimano ST-EF505 3 x 9
Cassette
Shimano 11-28t
Crank
Shimano FC-MT101
Bottom Bracket
Shimano sealed cartridge
Chain
KMC-Z9
Pedals
FPD NW-247
Wheels
Front Hub
Joytech
Rear Hub
Joytech
Rims
Weinmann U28 650
Tires
Kenda Kwick Seven.5 650 x 45
Brakes
Brakes
Shimano BR-MT200 hydraulic disc
Brake Levers
Shimano
Cockpit
Stem
Promax
Handlebar
Alloy butted 12 mm rise
Headset
FSA Orbit integrated sealed
Seat
Saddle
Opus City
Seatpost
Promax alloy 27.2 x 300
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | XS | SM | MD | LG | XL |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.493 mm | 1.494 mm | 1.494 mm | 1.494 mm | 1.494 mm |
| Stack | 560 mm | 575 mm | 590 mm | 605 mm | 620 mm |
| Reach | 375 mm | 385 mm | 395 mm | 405 mm | 415 mm |
| Top Tube Length | 530 mm | 550 mm | 570 mm | 590 mm | 610 mm |
| Seat Tube Angle | 74.5 ° | 74 ° | 73.5 ° | 73 ° | 72.5 ° |
| Seat Tube Length | 380 mm | 420 mm | 460 mm | 500 mm | 540 mm |
| Head Tube Angle | 71 ° | 71.25 ° | 71.5 ° | 71.75 ° | 72 ° |
| Head Tube Length | 148 mm | 163 mm | 183 mm | 198 mm | 213 mm |
| Chainstay Length | 440 mm | 445 mm | 445 mm | 445 mm | 450 mm |
| Bottom Bracket Drop | 65 mm | 65 mm | 60 mm | 60 mm | 60 mm |
| Standover Height | 726 mm | 752 mm | 783 mm | 808 mm | 834 mm |
| Wheels | 650 | 650 | 650 | 650 | 650 |
| Rider Min Height | 156 cm | 163 cm | 171 cm | 179 cm | 185 cm |
| Rider Max Height | 166 cm | 174 cm | 182 cm | 189 cm | 195 cm |