Whitty

Tyre structure maybe damaged if cords cut. Get someone to pull bike over on stand and spin wheel to see if there are any bulges. Same for chain on rear, just turn gently feeling for tight spots and watch chain links as they leave sprocket to see if they stick. Would not have thought it was your chain unless you park it up wet and unlubed and just leave it to rust. You sure there is nowt in back tyre? lol