Final answer:
Lighter tires and wheel rims decrease rotational inertia, leading to greater acceleration capabilities for a racing bike compared to reducing the frame's mass.
Step-by-step explanation:
The advantages of reducing the mass of the tires and wheel rims on a racing bike allow the racer to achieve greater accelerations due to the concept of rotational inertia. Tires and wheel rims are at the outer edge of the wheel and thus require more energy to change velocity because of their higher rotational inertia or moment of inertia
. By reducing the mass of these parts, you lower the rotational inertia, meaning less energy is needed for acceleration and deceleration, allowing quicker speed changes. Reducing the mass of the frame doesn't have the same effect because the frame's mass doesn't contribute as significantly to rotational inertia as the tires and rims do.