2015 Specialized Roubaix SL4 Pro Race vs 2016 Kona Private Jake
The Kona Private Jake size closest to your 54 is the M. Compare the M instead
What changes on the Kona Private Jake
Compared with the Specialized Roubaix SL4 Pro Race in 54, the Kona Private Jake in XL places the top of the head tube 56 mm higher and 20 mm further forward, relative to the bottom bracket. Its wheelbase is 46 mm longer, which can contribute to stability at speed.
- Frame stack
- +56 mm
- Higher front end
- Frame reach
- +20 mm
- Longer frame reach
- Wheelbase
- +46 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Specialized Roubaix SL4 Pro Race, 54Kona Private Jake, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL4 Pro Race 54 | Kona Private Jake XL | Difference |
|---|---|---|---|
| Reach | 380mm | 400 | +20 mm |
| Stack | 563mm | 619 | +56 mm |
| Head tube angle | 72° | 71.5 | −0.5° |
| Seat tube angle | 73.5° | 72.5 | −1.0° |
| Effective top tube | 548mm | 595 | +47 mm |
| Chainstay length | 415mm | 420 | +5 mm |
| Wheelbase | 1000mm | 1046 | +46 mm |
| BB drop | 71.5mm | 67.5 | −4 mm |
| Standover | 776mm | 845 | +69 mm |
| Seat tube length | 495mm | 590 | +95 mm |
| Head tube length | 165mm | 200 | +35 mm |
| Fork length | not listed | 395 |
Differences are the Kona Private Jake minus the Specialized Roubaix SL4 Pro Race. Full charts: 2015 Specialized Roubaix SL4 Pro Race, 2016 Kona Private Jake.
Where each sits in its class
Specialized Roubaix SL4 Pro RaceKona 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 Pro RaceSL4 Pro Race | Kona Private JakePrivate Jake |
|---|---|---|
| Frame | Specialized SL4 FACT | Kona Race Light 7005 Aluminum Butted |
| Shifter | SRAM Force 22 | SRAM Rival One |
| Derailleur | SRAM Force 22 | SRAM Rival One |
| Cassette | SRAM PG-1170 | SRAM Rival 11-32t 11spd |
| Chain | SRAM 1170 | KMC X11 |
| Wheelset | Roval Rapide CL 40 | Novatec 30 Disc |
| Tire | Specialized Turbo Pro | WTB Cross Boss 700x35c |
| Brake | SRAM Force | Tektro Spyre |
| Seatpost | Specialized CG-R | not listed |
| Saddle | Specialized Toupe Expert | WTB SL8 |
| Fork | not listed | Kona Full Carbon CX Race Disc |
| Crankset | not listed | SRAM Rival One PF30 |
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