2020 Specialized Sirrus Sport Step-Through Women's Spec vs 2018 Surly Ogre
The S is the Surly Ogre size closest to your S Specialized Sirrus Sport Step-Through Women's Spec. 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 Sport Step-Through Women's Spec in S, the Surly Ogre in S places the top of the head tube 56 mm higher and 23 mm further forward, relative to the bottom bracket. Its wheelbase is 18 mm longer, which can contribute to stability at speed.
- Frame stack
- +56 mm
- Higher front end
- Frame reach
- +23 mm
- Longer frame reach
- Wheelbase
- +18 mm
- Longer: steadier at speed
- Head angle
- +1.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Sirrus Sport Step-Through Women's Spec, SSurly Ogre, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus Sport Step-Through Women's Spec S | Surly Ogre S | Difference |
|---|---|---|---|
| Reach | 373mm | 395.5 | +23 mm |
| Stack | 536mm | 592 | +56 mm |
| Head tube angle | 70° | 71.5° | +1.5° |
| Seat tube angle | 73.5° | 73.0° | −0.5° |
| Chainstay length | 440mm | 440 | ±0 mm |
| Wheelbase | 1031mm | 1049.4 | +18 mm |
| BB drop | 70mm | 68 | −2 mm |
| BB height | 275mm | not listed | |
| Standover | 615mm | 763.5 | +149 mm |
| Seat tube length | 400mm | 406.4 | +6 mm |
| Fork length | 390mm | 447 | +57 mm |
| Head tube length | 124mm | 110 | −14 mm |
| Effective top tube | not listed | 575 |
Differences are the Surly Ogre minus the Specialized Sirrus Sport Step-Through Women's Spec. Full charts: 2020 Specialized Sirrus Sport Step-Through Women's Spec, 2018 Surly Ogre.
Where each sits in its class
Specialized Sirrus Sport Step-Through Women's SpecSurly 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 Sport Step-Through Women's SpecSport Step-Through Women's Spec | Surly OgreOgre |
|---|---|---|
| Derailleur | Shimano Sora | Shimano Deore Front, Shimano Deore Rear |
| Cassette | Shimano Sora | Shimano HG50 |
| Chain | KMC X9 | KMC X10 |
| Crankset | Specialized 2-piece | Shimano T551 |
| Tire | Specialized Nimbus II Sport Reflect | Surly Extraterrestrial |
| Brake | Tektro HD-R310 | Avid BB7, Tektro FR5 |
| Saddle | Specialized Aldia Sport | WTB Volt Sport |
| Frame | not listed | Surly Ogre |
| Shifter | not listed | Shimano Deore |
| Chainring | not listed | Shimano T551 |
| Bottom bracket | not listed | SRAM PowerSpline |
| Rim | not listed | WTB i29 |
| Handlebar | not listed | Surly Moloko |
| Stem | not listed | Kalloy AS-008 |
| Grips | not listed | Velo Black |
| Headset | not listed | Cane Creek 40 |
| Seatpost | not listed | Kalloy SP-342 |
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