2015 Specialized Crux Pro Race UDi2 vs 2017 Trek Boone Disc
The 50 is the Trek Boone Disc size closest to your 46 Specialized Crux Pro Race UDi2. 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 Boone Disc
Compared with the Specialized Crux Pro Race UDi2 in 46, the Trek Boone Disc in 50 places the top of the head tube 12 mm higher and 9 mm further forward, relative to the bottom bracket. Its wheelbase is 7 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +12 mm
- Higher front end
- Frame reach
- +9 mm
- Longer frame reach
- Wheelbase
- −7 mm
- Shorter: quicker to change direction
- Head angle
- +1.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Crux Pro Race UDi2 is drawn. The Trek Boone Disc numbers we have for size 50 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Crux Pro Race UDi2 46 | Trek Boone Disc 50 | Difference |
|---|---|---|---|
| Reach | 366mm | 375 | +9 mm |
| Stack | 522mm | 534 | +12 mm |
| Head tube angle | 69.5° | 71.0° | +1.5° |
| Seat tube angle | 75.5° | not listed | |
| Effective top tube | 510mm | 518 | +8 mm |
| Chainstay length | 425mm | 425 | ±0 mm |
| Wheelbase | 1008mm | 1001 | −7 mm |
| BB drop | 71mm | 70 | −1 mm |
| Standover | 764mm | 747 | −17 mm |
| Seat tube length | 470mm | 476 | +6 mm |
| Head tube length | 100mm | 110 | +10 mm |
Differences are the Trek Boone Disc minus the Specialized Crux Pro Race UDi2. Full charts: 2015 Specialized Crux Pro Race UDi2, 2017 Trek Boone Disc.
Where each sits in its class
Specialized Crux Pro Race UDi2Trek Boone Disc
Each bike is ranked against the other gravel 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 Crux Pro Race UDi2Pro Race UDi2 | Trek Boone Disc5 Disc |
|---|---|---|
| Shifter | Shimano 785 Di2 | Shimano RS685 |
| Derailleur | Shimano Ultegra Di2 | Shimano 105 |
| Cassette | Shimano Ultegra | Shimano 105 |
| Chain | Shimano Ultegra | Shimano 105 |
| Wheelset | Roval Control CX | not listed |
| Tire | Specialized Terra Pro | Bontrager CX3 Team Issue |
| Brake | Shimano 785 | Shimano RS685 |
| Seatpost | Specialized CG-R | Bontrager Tuned |
| Saddle | Specialized Phenom Comp | Bontrager Paradigm |
| Frame | not listed | Trek OCLV |
| Fork | not listed | Trek IsoSpeed Cross |
| Crankset | not listed | FSA Energy Cross |
| Bottom bracket | not listed | Trek BB90 |
| Handlebar | not listed | Bontrager VR-C |
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