2015 Specialized Sirrus Pro Carbon Disc vs 2016 Surly Ogre
The M is the Surly Ogre size closest to your L Specialized Sirrus Pro Carbon Disc. 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 Disc in L, the Surly Ogre in M places the top of the head tube 13 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 5 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −13 mm
- Lower front end
- Frame reach
- +1 mm
- About the same reach
- Wheelbase
- −6 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 Disc, LSurly Ogre, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus Pro Carbon Disc L | Surly Ogre M | Difference |
|---|---|---|---|
| Reach | 410mm | 410.5 | +1 mm |
| Stack | 616mm | 603.4 | −13 mm |
| Head tube angle | 72° | 72.0° | ±0.0° |
| Seat tube angle | 73° | 73.0° | ±0.0° |
| Effective top tube | 600mm | not listed | |
| Chainstay length | 435mm | 440 | +5 mm |
| Wheelbase | 1070mm | 1064.5 | −6 mm |
| BB drop | 70mm | 68 | −2 mm |
| Standover | 822mm | 795.7 | −26 mm |
| Seat tube length | 530mm | 457.2 | −73 mm |
| Head tube length | 190mm | 120 | −70 mm |
| Fork length | not listed | 447 |
Differences are the Surly Ogre minus the Specialized Sirrus Pro Carbon Disc. Full charts: 2015 Specialized Sirrus Pro Carbon Disc, 2016 Surly Ogre.
Where each sits in its class
Specialized Sirrus Pro Carbon DiscSurly 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 Carbon DiscPro Carbon Disc | Surly Ogre |
|---|---|---|
| Frame | Specialized Sirrus FACT | not listed |
| Shifter | SRAM SL X1 | not listed |
| Derailleur | SRAM X1 | not listed |
| Cassette | SRAM XG-1180 | not listed |
| Chain | SRAM X1 | not listed |
| Crankset | SRAM Force CX1 | not listed |
| Wheelset | Specialized AXIS 4.0 | not listed |
| Brake | Magura MTS | not listed |
| Seatpost | Specialized Pro Pave | not listed |
| Saddle | Specialized Phenom Expert | not listed |
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