Focus rims have a no-nonsense low-profile design that eliminates excess material making them some of the lightest weight double-wall rims available A 20 x 1 18" rim for example weighs just 280 grams 987 ounces Strong & true Focus rims have single eyelets to help prevent spoke pull-through which means higher spoke tensions are possible 20 x 1 18 451mm x 12mm