Our bike is made from carbon, aluminum or steel. Wheel dia., from 12", 14", 16", 18", 20", 24" & 26" with various type/model, like : bmx, mountain bike, city bike, folding bike, etc.. Or it could be divided based on customer's age : Kids, Teenager, Ladies & Gents. Beside the bike itself, we also selling it's accessories, like : stands, side support & wheels, luggage carrier, bells, locks, air pumps & parts, light & horn, mirror, spanner, tool kit, dynamo set, bags, basket, bottle/bottle cage & cable guide. This accessories could attached in the bike base on buyer's preferences. Brand : Wimcycle®. Produced under ISO 9001 certification company. For any interested parties, pls kindly contact for further details. Thank you.