For the lightweight yet stiff carbon frame, Trek has modified the IsoSpeed coupling between the top tube and seat tube, which is familiar from the Domane comfort model. The pivot point, where the tubes are connected by a ball bearing, has been moved slightly to the rear. The effect is so noticeable that you feel like you're riding with one bar less pressure in your tyres. The equipment with Di2 gears fulfils the highest functional demands, but does not pay attention to the last gram. A lighter body, which would drive up the price even more, and tubular tyres on lightweight wheels would make the Boone the ultimate cross bike.
What the testers say
Falko Technically the most exciting frame of all. Rides like on tubular tyres. The trick with the joint in the frame works.
Oliver The rear suspension flexes really well and the saddle is very comfortable. Perfect for the second half of the race when your strength is waning.
Price 5,499 Euro
Weight 8.4 kilos
Available in specialised shops
Reference/Info www.trekbikes.com
Weight frame/fork/steering bearing** 1.056/530/57 g
Frame sizes*** 50, 52, 54, 56, 58, 61 cm
Seat/steering angle 73,5°/72,5°
Seat/top tube/head tube 630/560/158 mm plus 15 mm headset cap
Wheelbase/caster 1,020/66 mm
Stack/Reach/STR**** 583/388 mm/1.50
Equipment
Steering bearing FSA, top 1-1/8, bottom 1-1/2 inch
Brakes (f./h.) Shimano BR-RS785 (160/160 mm)
Gearshift/bottom bracket Shimano Ultegra Di2 (46/36 t.; BB90)
Wheels/tyres HED Ardennes/Bontrager CX3 32 mm (folding tyre)
Handlebar/stem Bontrager
Saddle/post Bontrager Evoke 3/integrated
*The frame set accounts for 40 per cent and the equipment for 60 per cent of the overall grade. The grades are calculated with all decimal places up to the final grade; however, for the sake of clarity, all grades are given with rounded decimal places.
**Weighed weights.
***Manufacturer's specification, test size bold.
****Stack/Reach projected vertical/horizontal measurement from the centre of the bottom bracket to the top of the head tube; STR (Stack to Reach): 1.36 means a very stretched, 1.60 an upright riding position.
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