Boson
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The carbon racing bike that provides the best value for money. I have a distinctive but balanced character. My excellent road handling properties and professional look make me the ideal sports racing bike. My sole purpose in life is to serve the dedicated tour cyclist who wants to get the most out of his racing bike, and I am always ready to join him in facing the ultimate challenge.
The stability of my frame is based on my slanting oversized down tube, giving me the perfect mix of stiffness and weight. My oval shaped, slightly downwards angled head tube welds us into a compact unit ready to take up every challenge.
My seat tube, narrow at the top and broader towards the bottom, provides improved stiffness at the bottom bracket. My elegantly shaped seat stays give me a slim profile towards the rear. The chain stays have a somewhat broader profile, allowing me to take perfect control over road vibrations and deliver maximum power to the wheels. The end result is that you can take off for a trip on my saddle comfortably and without a care in the world.
As my straight front fork is integrated into the head tube, I steer you precisely in the direction you want to go – straight ahead, shallow curves or hairpin turns at high or low speed, it makes no difference.
|I am Isaac Boson, your no-nonsense bike buddy!
Isaac Boson
General
Frame Sizes: 50, 52, 54, 56, 58, 60, 62
Weave: UD Monocoque
Frame
Weight: From 1145 till 1325 gr
Stiffness: Head Tube 100 N/mm **
Target Stiffness: BB 150-160 N/mm **
Fork
Fork Weight: MONOCOQUE 450 gr *
Fork Stiffness Lateral: 50 N/mm **
Weave: UD
Steerer: UD Monocoque 1"1/8 - 1"1/4
Crown: UD Monocoque 1"1/8 - 1"1/4
Legs: UD Monocoque
Dropouts: Alloy
Seat Post
Weave: Isaac 350X31.6 Off set UD
Frame Technical Specifications
BB Shell: BSA
Headset Cups: 1"1/8 - 1"1/4
Seat Post Insert: 31,6 mm
Dropouts: One piece
Derailleur hanger: replaceable
Seat post Clamp: Isaac-106 black
Cable Stopper Shifter: Semi Internal (Down Tube)
Cable Stopper Brake: Internal (Top Tube)
Headset: Isaac CF 1"1/8 - 1"1/4
Bike Specifications
Group: Ultegra 6700
Crankset: Ultegra compact 34-50
Wheel set: Reynolds Solitude
Tire: Schwalbe Ultremo R.1 700X23
Tube: Schwalbe 18/28-622/630 Group 15 SV 40 mm
Saddle: Selle Italia SL XC Black White
Handlebar: Ritchey Pro Logic II Wet Black O/S 31.8
Stem: Ritchey Pro 4-Axis Wet Black O/S 84D 31.8
Bar tape: Lizard Skins Durasoft 2.5mm
Bikeweight (indication) Framesize 56 (without pedals)
8,1 kg
* Target weight
** Target Stiffness
| Dimension | size 50 | size 52 | size 54 | size 56 | size 58 | size 60 | size 62 | |
| A | seat tube total lenght | 500 | 520 | 540 | 560 | 580 | 600 | 620 |
| A2 | seat tube joint | 439,9 | 469,9 | 494,9 | 509,9 | 519,9 | 534,9 | 544,7 |
| B | top tube lenght | 511 | 525 | 545 | 558 | 570 | 583 | 594,8 |
| C | seat tube angle | 75° | 74,5° | 74° | 74° | 73,5° | 73,5° | 73,5° |
| D | head tube | 124 | 144 | 164 | 176,5 | 189 | 201,5 | 214 |
| E | head tube angle | 71° | 72,5° | 73° | 73° | 73,5° | 73,5° | 73,5° |
| F | BB drop | 75 | 70 | 70 | 70 | 70 | 65 | 65 |
| G | BB to front wheel | 584,6 | 584 | 959,1 | 608 | 610,4 | 623,6 | 636,1 |
| H | chain stay | 406 | 406 | 406 | 406 | 406 | 406 | 406 |
| I | wheel base | 978,8 | 979,8 | 991 | 1003,9 | 1006,2 | 1021,1 | 1033,6 |
| J | fork rare | 48 | 48 | 48 | 48 | 48 | 48 | 48 |
| K | standover height | 746,7 | 769,9 | 788 | 807,2 | 828,2 | 849,7 | 868,4 |
| L | standover height offset | 122,9 | 132,5 | 142,4 | 147,9 | 158,3 | 163,7 | 169,1 |
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