On the contrary! You have to consider the total weight - seatpost, lock and mount. The 27.2 mm/ 450 mm version of the Uplock weighs 1,375 grams in total - i.e. the seat post, the folding saddle head and the folding lock. A comparably secure 90 cm folding lock with bracket and 27.2 mm aluminum post in 450 mm length weighs approx. 1775 grams. The Uplock system therefore weighs around 400 grams less!