1. Material: Reinforced Nylon as main plastic, which increase strength, toughness and aging resistance.

2. Monitor: data is more exact and close to C2 at Level Six. Monitor size (100*80mm) is bigger than C2 (79*79mm).

3. Resistance difference: more prominent among levels.

4. Pedal: two buttons easy-adjust design.

5. Front and back stand: tube size (90*40mm) is bigger than C2 (50*25mm).