2015 Specialized Roubaix SL4 Elite vs 2016 Kona Private Jake
The M is the Kona Private Jake size closest to your 54 Specialized Roubaix SL4 Elite. 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 Elite in 54, the Kona Private Jake in M places the top of the head tube 3 mm lower and 4 mm further forward, relative to the bottom bracket. Its wheelbase is 20 mm longer, which can contribute to stability at speed.
- Frame stack
- −3 mm
- Lower front end
- Frame reach
- +4 mm
- Longer frame reach
- Wheelbase
- +20 mm
- Longer: steadier at speed
- Head angle
- −1.5°
- Slacker: calmer steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Specialized Roubaix SL4 Elite, 54Kona Private Jake, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL4 Elite 54 | Kona Private Jake M | Difference |
|---|---|---|---|
| Reach | 380mm | 384 | +4 mm |
| Stack | 563mm | 560 | −3 mm |
| Head tube angle | 72° | 70.5 | −1.5° |
| Seat tube angle | 73.5° | 74 | +0.5° |
| Effective top tube | 548mm | 545 | −3 mm |
| Chainstay length | 415mm | 420 | +5 mm |
| Wheelbase | 1000mm | 1020 | +20 mm |
| BB drop | 71.5mm | 70 | −2 mm |
| Standover | 776mm | 770 | −6 mm |
| Seat tube length | 495mm | 510 | +15 mm |
| Head tube length | 165mm | 140 | −25 mm |
| Fork length | not listed | 395 |
Differences are the Kona Private Jake minus the Specialized Roubaix SL4 Elite. Full charts: 2015 Specialized Roubaix SL4 Elite, 2016 Kona Private Jake.
Where each sits in its class
Specialized Roubaix SL4 EliteKona 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 EliteSL4 Elite | Kona Private JakePrivate Jake |
|---|---|---|
| Frame | Specialized SL4 FACT | Kona Race Light 7005 Aluminum Butted |
| Shifter | Shimano 105 | SRAM Rival One |
| Derailleur | Shimano 105 | 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 S5 | Novatec 30 Disc |
| Tire | Specialized Espoir Elite | WTB Cross Boss 700x35c |
| Brake | Shimano 105 | Tektro Spyre |
| Seatpost | Specialized CG-R | not listed |
| Saddle | Specialized Toupe Comp | WTB SL8 |
| Fork | not listed | Kona Full Carbon CX Race Disc |
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
