Isaac is back! One year after it withdrew from the market, the brand is making a comeback with a new Dutch owner and a new model range. As an extremely stable bike, the "Boson" - named after a term from particle physics - is an interesting option for athletic riders for whom weight is not so important. The long wheelbase makes the bike a straight-line runner par excellence, while internally routed brake and gear cables create a tidy look. The equipment is solid and functional with the "Ultegra" groupset from Shimano, Fulcrum's "Racing 5" wheels and Ritchey "Pro" handlebars. There is also a four-year guarantee on the frame and fork, including an accident replacement policy.
Purchase/Info: Tehava International, phone 0031/46/4752100, www.isaac-cycle.com
Weight frame/fork/ headset bearing*: 1,269/496/66 g
Frame sizes**: 50, 52, 54, 56, 58, 60, 62 cm
Seat/steering angle: 74.5°/73.5°
Seat/top/head tube: 545/565/201 mm
Wheelbase/ caster: 1,003/50 mm
Stack/reach***: 602/397 mm
EQUIPMENT
Fork: Isaac
Steering bearing: Isaac, 1-1/8 inch
Brakes/gears/bottom bracket: Shimano Ultegra (50/34 t.)
Wheels/tyres: Fulcrum Racing 5/Schwalbe Ultremo R1 tyres
Handlebar/stem: Ritchey Pro/Ritchey Pro
Saddle/post: Selle Italia SL/Isaac (31.6 mm)
*weighted weights; **manufacturer's specification; test frame size greased; ***stack/reach: projected vertical or horizontal dimension from centre of bottom bracket to top edge of headset cap
