Cotton Reels (Offset) for BMW G310R / GS '17- (CR0064BK) Are they cotton reels or swingarm protectors Well, they are both really!! R&G Offset Cotton Reels protect the swingarm and core swingarm components from damage in the event of a crash, slide or drop. Doubling up as paddock stand bobbins too, they allow the motorcycles rear wheel to be lifted into the air with the use of a paddock stand to perform chain adjustments, chain lubrication and cleaning! This particular pair of R&G Offset Cotton Reel kit has been specially designed to move the Cotton Reel/Paddock Stand Bobbin location further rearward as conventionallyswingarm mounted cotton reels could/would impact the OE exhaust during suspension travel, causing damage and suspension/handling performance issues. Suitable for the BMW G310R / GS '17- models Fits: BMW G310GS 2018-2020 G310R 2017 2019-2021