2017 Specialized Allez Jr. vs 2018 Trek Émonda 650
The 650c is the Trek Émonda 650 size closest to your 44 Specialized Allez Jr.. 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 Trek Émonda 650
Compared with the Specialized Allez Jr. in 44, the Trek Émonda 650 in 650c places the top of the head tube 13 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 18 mm longer, which can contribute to stability at speed.
- Frame stack
- −13 mm
- Lower front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- +18 mm
- Longer: steadier at speed
- Head angle
- −0.8°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Specialized Allez Jr. is drawn. The Trek Émonda 650 numbers we have for size 650c are missing the seat angle and chainstay length.
Geometry side by side
| Measurement | Specialized Allez Jr. 44 | Trek Émonda 650 650c | Difference |
|---|---|---|---|
| Reach | 358mm | 356 | −2 mm |
| Stack | 490mm | 477 | −13 mm |
| Head tube angle | 72° | 71.2° | −0.8° |
| Seat tube angle | 76° | not listed | |
| Effective top tube | 480mm | 479 | −1 mm |
| Chainstay length | 380mm | not listed | |
| Wheelbase | 921mm | 939 | +18 mm |
| BB drop | 49mm | 52 | +3 mm |
| BB height | 236.5mm | not listed | |
| Standover | 665mm | 676 | +11 mm |
| Seat tube length | 400mm | 384 | −16 mm |
| Fork length | 346mm | not listed | |
| Head tube length | 130mm | 115 | −15 mm |
Differences are the Trek Émonda 650 minus the Specialized Allez Jr.. Full charts: 2017 Specialized Allez Jr., 2018 Trek Émonda 650.
Where each sits in its class
Specialized Allez Jr.Trek Émonda 650
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 Allez Jr.Jr. | Trek Émonda 650650 |
|---|---|---|
| Shifter | microSHIFT R482 | Shimano Sora |
| Derailleur | Shimano Claris R2400 | Shimano Sora |
| Chain | KMC Z7 | KMC X9 |
| Wheelset | Specialized Axis Sport JR | not listed |
| Tire | Specialized Turbo Elite | Kenda Koncept |
| Frame | not listed | Trek Alpha Platinum |
| Cassette | not listed | Shimano HG50 |
| Crankset | not listed | Shimano Sora |
| Bottom bracket | not listed | Trek BB86.5 |
| Handlebar | not listed | Bontrager Comp VR-S |
| Saddle | not listed | Trek Dialed 24 |
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