Dr. Sanjiv Narayan is an experienced physician whose cardiology research led to the founding of the start-up firm Topera, which was later acquired by Abbott. After the acquisition by Abbott, Dr. Sanjiv Narayan began work as a Professor of Medicine at Stanford University, where he currently serves. Also a husband and father of three children, Dr. Narayan enjoys family activities such as swimming, biking, and skateboarding.
Many variations affect the way a skateboard rides. Skateboard wheels can be found in various shapes, textures, materials, and diameter sizes. Diameter refers to the size of the wheels, which can be found in sizes from 48 millimeters (mm) to 60 mm. Small wheels have less overall speed and greater acceleration, while large wheels can reach greater speeds but accelerate more slowly. The following are some wheel size categories:
-48mm-53mm. These small, responsive wheels are usually made of a hard material. These are often used for street or technical trick skating.
-52mm-56mm. These wheels fall into the middle of the range, giving a mix of responsiveness, shock absorption, and speed. These wheels are often used for beginners.
-50mm-60mm. These large, stable wheels are ideal for jumps and ramps. They are often used for transition and vert skating.
-60mm and larger. Often used for transportation, these large wheels provide high shock absorption.