The is useful for improving your visibility in the dark from the side. You might already have front and rear lights and reflectors, but can drivers and other road users also see you from the side? These spoke reflectors clip onto the spokes of your wheels and provide extra visibility from the side. Each item comes with four pieces, enough to attach two spoke reflectors to each wheel. The XLC CR-S01 spoke reflector complies with traffic regulations for all bicycles and can be used on many different types. This includes, but is not limited to, mountain bikes, road bikes, city bikes, and trekking bikes.Spoke reflectorsSet of 4 piecesXLC Article number: 2500250040 EAN code: 4055149339500 Retail packaging: Yes