2017 Specialized Sirrus Expert Carbon vs 2018 Surly Ogre
The S is the Surly Ogre size closest to your S Specialized Sirrus Expert Carbon. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Surly Ogre
Compared with the Specialized Sirrus Expert Carbon in S, the Surly Ogre in S places the top of the head tube 18 mm higher and about as far forward, relative to the bottom bracket.
- Frame stack
- +18 mm
- Higher front end
- Frame reach
- +1 mm
- About the same reach
- Wheelbase
- −3 mm
- About the same
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Specialized Sirrus Expert Carbon, SSurly Ogre, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus Expert Carbon S | Surly Ogre S | Difference |
|---|---|---|---|
| Reach | 395mm | 395.5 | +1 mm |
| Stack | 574mm | 592 | +18 mm |
| Head tube angle | 71° | 71.5° | +0.5° |
| Seat tube angle | 73.3° | 73.0° | −0.3° |
| Effective top tube | 568mm | 575 | +7 mm |
| Chainstay length | 435mm | 440 | +5 mm |
| Wheelbase | 1052mm | 1049.4 | −3 mm |
| BB drop | 70mm | 68 | −2 mm |
| BB height | 275mm | not listed | |
| Standover | 752.2mm | 763.5 | +11 mm |
| Seat tube length | 440mm | 406.4 | −34 mm |
| Fork length | 398mm | 447 | +49 mm |
| Head tube length | 150mm | 110 | −40 mm |
Differences are the Surly Ogre minus the Specialized Sirrus Expert Carbon. Full charts: 2017 Specialized Sirrus Expert Carbon, 2018 Surly Ogre.
Where each sits in its class
Specialized Sirrus Expert CarbonSurly Ogre
Each bike is ranked against the other commuter bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Specialized Sirrus Expert CarbonExpert Carbon | Surly OgreOgre |
|---|---|---|
| Derailleur | Shimano 105 | Shimano Deore Front, Shimano Deore Rear |
| Cassette | Shimano 105 | Shimano HG50 |
| Chain | KMC X11-1 | KMC X10 |
| Crankset | FSA Gossamer Pro | Shimano T551 |
| Bottom bracket | Specialized BB386 Evo | SRAM PowerSpline |
| Wheelset | Specialized Axis Expert | not listed |
| Tire | Specialized Espoir Sport Reflect | Surly Extraterrestrial |
| Brake | Shimano Deore | Avid BB7, Tektro FR5 |
| Stem | Specialized Flowset | Kalloy AS-008 |
| Seatpost | Specialized CG-R | Kalloy SP-342 |
| Saddle | Specialized Canopy Comp | WTB Volt Sport |
| Frame | not listed | Surly Ogre |
| Shifter | not listed | Shimano Deore |
| Chainring | not listed | Shimano T551 |
| Rim | not listed | WTB i29 |
| Handlebar | not listed | Surly Moloko |
| Grips | not listed | Velo Black |
| Headset | not listed | Cane Creek 40 |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
