... :20''MATERIAL:alloy frameSPEED CHANGE:inner gears 6-speeds1. Rim Size: from 16" 20"2. Bike Frame: chrome ... -molybdenum steel and painting, co2 welding steel /suspension fork4. Rim: 16" 20" steel alloy or aluminum5. Handlebar and stem ... Co., Ltd.. Here you can buy varieties of bicycle for mountain bike, BMX, folding bike, city bike, All ... requirement. 20'' pocket BMX Performance bike Bicycle for sale