2017 Specialized Sirrus Pro Carbon vs 2018 Surly Ogre
The S is the Surly Ogre size closest to your M Specialized Sirrus Pro 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 Pro Carbon in M, the Surly Ogre in S places the top of the head tube at about the same height and 7 mm further back, relative to the bottom bracket. Its wheelbase is 11 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +1 mm
- About the same height
- Frame reach
- −8 mm
- Shorter frame reach
- Wheelbase
- −11 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Specialized Sirrus Pro Carbon, MSurly Ogre, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus Pro Carbon M | Surly Ogre S | Difference |
|---|---|---|---|
| Reach | 403mm | 395.5 | −8 mm |
| Stack | 591mm | 592 | +1 mm |
| Head tube angle | 71.5° | 71.5° | ±0.0° |
| Seat tube angle | 73.5° | 73.0° | −0.5° |
| Effective top tube | 578mm | 575 | −3 mm |
| Chainstay length | 435mm | 440 | +5 mm |
| Wheelbase | 1060mm | 1049.4 | −11 mm |
| BB drop | 70mm | 68 | −2 mm |
| BB height | 275mm | not listed | |
| Standover | 784.6mm | 763.5 | −21 mm |
| Seat tube length | 485mm | 406.4 | −79 mm |
| Fork length | 398mm | 447 | +49 mm |
| Head tube length | 165mm | 110 | −55 mm |
Differences are the Surly Ogre minus the Specialized Sirrus Pro Carbon. Full charts: 2017 Specialized Sirrus Pro Carbon, 2018 Surly Ogre.
Where each sits in its class
Specialized Sirrus Pro 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 Pro CarbonPro Carbon | Surly OgreOgre |
|---|---|---|
| Shifter | Shimano SL-RS700 | Shimano Deore |
| Derailleur | Shimano Ultegra | Shimano Deore Front, Shimano Deore Rear |
| Cassette | Shimano 105 | Shimano HG50 |
| Chain | KMC X11SL-1 DLC | KMC X10 |
| Crankset | FSA SL-K | Shimano T551 |
| Bottom bracket | FSA MegaEvo | SRAM PowerSpline |
| Pedals | Specialized BB386 EVO | not listed |
| Wheelset | Specialized Axis Pro | 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 Phenom Expert | WTB Volt Sport |
| Frame | not listed | Surly Ogre |
| 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 |
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