Why did i get spider veins on my legs after biking? how can i get them removed?

Vasodilitation : When you go biking you increase the circulation to your legs and your blood vessels will become dilated, hence the "spider veins". There are cosmetic procedures available to sclerose these tiny veins and reduce their appearance.

Spider vein cause: Although biking, and all exercise, does increase blood flow and venous pressure in your legs, your spider veins could be due to something else. The biking could be coincidental. There are a number of factors that contribute to the development of spider veins, including hidden underlying larger vein reflux that you can't see. Fortunately, spider veins can be treated easily. See a vein specialist.