Radon is testing the newly developed "Spire" carbon frame for the first time. Formally, the frame, which weighs 1,167 grams in size 58, looks much more independent than its predecessor. Multiple tube cross-sections, slim rear stays and the tapered steerer tube sharpen the profile, while the brake cable in the top tube creates a clean look. The calculation behind these measures is clear: Radon wants to move away from the image of a price breaker and become a recognised brand. However, the price still has to be right. That's why the frame is forgiven for not having any outstanding strengths. Because you will also look in vain for weaknesses, and consequently, in combination with the typically high-quality equipment, the result is an attractive, lightweight bike with good riding stability and all-round convincing handling.
Purchase/info: H&S Bike Discount, phone 02225/8888-222, www.radon-bikes.com
Weight frame/fork/ headset bearing*: 1,167/392/94 g
Frame sizes**: 53, 56, 58, 60, 63 cm
Seat/steering angle: 73.5°/72°
Seat/top/head tube: 521/555/174 mm
Wheelbase/ caster: 999/61 mm
Stack/reach***: 572/395 mm
EQUIPMENT
Fork: Radon
Steering bearing: Radon, top 1-1/8, bottom 1.5 inch
Brakes/gears/bottom bracket: Shimano Ultegra (50/34 t.)
Wheels/tyres: Mavic Ksyrium Elite/ Schwalbe Ultremo R tyres
Handlebar/stem: Syntace Racelite 2014/Syntace F139
Saddle/post: Selle Italia Filante/ RFR (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
