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 175 rim for example weighs just 362 grams 127 ounces Strong & true Focus rims have single eyelets to help prevent spoke pull-through which means higher spoke tensions are possible 20” x 175 (406mm) 362 grams 127 ounces (ERD 394) 24” x 175 (507mm) 432 grams 152 ounces (ERD 494) 20” x 1 18 (451mm) 280 grams 987 ounces (ERD 438) 24” x 1 18 (520mm) 343 grams 121 ounces (ERD 516) We recommend a spoke tension of between 110kgf & 115kgf But remember every rim is different The mark of a truly skilled wheel builder is the ability to find the highest tension a rim will allow while staying true Please note Focus front rims lack a braking surface & are not designed to be used with rim brakes