These high quality accessory 20×15 roller weights for scooters are from NCY, a very well known manufacturer of aftermarket competitive riding scooter parts and accessories These high quality roller weights are constructed with a low-friction polymer to ensure a long life and superlative operationDescription These high quality accessory 20×15 roller weights for scooters are from NCY, a very well known manufacturer of aftermarket competitive riding scooter parts and accessories.These high quality roller weights are constructed with a low-friction polymer to ensure a long life and superlative operation.The 20 x 15mm weights is the OEM size on the Honda PCX and the Genuine Blur 220i. The Genuine Blur 220i takes 14.5g stock rollers.A good set of roller weights are an important tuning device and they will have a significant impact on your scooter’s performance, however flat spots can develop from long use and negatively affect performance.Tuning Tips: Light rollers are good for quick ac