The titanium revival is upon us – and it is exceptionally light 4kg*. That’s a newborn baby. A 7 week old Labrador puppy. Your Octane Sub4. The classic Octane design has been redefined, combining it with tried and tested Sub4 technology and a hand crafted made to measure titanium grade 9 frame. Titanium has this wonderful natural quality that absorbs shocks and soaks up road vibration, delivering a super-smooth and comfortable ride quality for you. Transferring, propelling, lifting, turning… All effortless with your Octane Sub4. Smooth riding The Octane Sub4 frame has natural in-built shock absorption to soak up road vibration, which means that it will deliver a super-smooth and comfortable ride quality like no other. Strength to weight ratio Strong as steel but 45% lighter, titanium has the highest strength-to-weight ratio out of all the known metals.