2015 Specialized Roubaix SL4 Comp vs 2016 Kona Private Jake
The S is the Kona Private Jake size closest to your 49 Specialized Roubaix SL4 Comp. 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 Kona Private Jake
Compared with the Specialized Roubaix SL4 Comp in 49, the Kona Private Jake in S places the top of the head tube 10 mm higher and 7 mm further back, relative to the bottom bracket. Its wheelbase is 15 mm longer, which can contribute to stability at speed.
- Frame stack
- +10 mm
- Higher front end
- Frame reach
- −7 mm
- Shorter frame reach
- Wheelbase
- +15 mm
- Longer: steadier at speed
- Head angle
- −1.5°
- Slacker: calmer steering
- Chainstays
- +8 mm
- Longer: more planted
The two frames
Specialized Roubaix SL4 Comp, 49Kona Private Jake, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL4 Comp 49 | Kona Private Jake S | Difference |
|---|---|---|---|
| Reach | 378mm | 371 | −7 mm |
| Stack | 527mm | 537 | +10 mm |
| Head tube angle | 72° | 70.5 | −1.5° |
| Seat tube angle | 75.5° | 75 | −0.5° |
| Chainstay length | 412mm | 420 | +8 mm |
| Wheelbase | 983mm | 998 | +15 mm |
| Standover | 730mm | 740 | +10 mm |
| Seat tube length | 445mm | 480 | +35 mm |
| Head tube length | 125mm | 115 | −10 mm |
| Effective top tube | not listed | 515 | |
| BB drop | not listed | 70 | |
| Fork length | not listed | 395 |
Differences are the Kona Private Jake minus the Specialized Roubaix SL4 Comp. Full charts: 2015 Specialized Roubaix SL4 Comp, 2016 Kona Private Jake.
Where each sits in its class
Specialized Roubaix SL4 CompKona Private Jake
Each bike is ranked against the other road 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 Roubaix SL4 CompSL4 Comp | Kona Private JakePrivate Jake |
|---|---|---|
| Frame | Specialized SL4 FACT | Kona Race Light 7005 Aluminum Butted |
| Shifter | Shimano Ultegra | SRAM Rival One |
| Derailleur | Shimano Ultegra Di2, Shimano Ultegra | SRAM Rival One |
| Cassette | Shimano 105 | SRAM Rival 11-32t 11spd |
| Chain | Shimano 105 | KMC X11 |
| Crankset | Praxis TURN Zayante | SRAM Rival One PF30 |
| Wheelset | Fulcrum S4 | Novatec 30 Disc |
| Tire | Specialized Turbo Pro | WTB Cross Boss 700x35c |
| Brake | Shimano 105 | Tektro Spyre |
| Seatpost | Specialized CG-R | not listed |
| Saddle | Specialized Toupe | WTB SL8 |
| Fork | not listed | Kona Full Carbon CX Race Disc |
Know what is on every bike.
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