Halfords Plastic Chains & Spares Guard 42-44T | Halfords UK
FAHRER H³lse Chain guard for hub shifting and chain shifting. Short plastic tube, flexible attached to the chain stay. 22 grams, good trousers protection Black - Cycle Service Nordic US
Plastic chain wheel cover bicycle chains wheel cover mountain bike sprocket cover sprocket protection plate black chain wheel cover chain guard ring crankset protective film for 42t and 44t : Amazon.co.uk: Sports
Oxford CG330 Universal Chain Guard for Bike Cycle Bicycle Plastic Chainguard : Amazon.co.uk: Sports & Outdoors
DLBEOU Bicycle Chain Guard Black Plastic Crank Cover for Shimano M430 M590 M390 LMLY
Why don't cyclo-cross bicycles have full chain guards like this? (They would of course be shaped with the derailleur gearing kept in mind.) You can make these guards from plastic and their
Oshhni Universal Bike Chain Guard Protector 32T 34T 36T 38T Easy to Install Bike Chain Protector Bike Chain Guard Cover for Bike Road, Black : Amazon.co.uk: Sports & Outdoors