noun
impost; assigned weight
In horse racing, the weight a horse must carry, including the jockey and any additional lead weights, as determined by the race conditions.
See also: 斤量
このレースの負担重量は55キロです。
The assigned weight for this race is 55 kilograms.
斤量 is a synonym also used in horse racing, but 負担重量 is the more formal and commonly used term in modern racing contexts.
Compound of 負担 (burden) and 重量 (weight), directly describing the weight burden assigned to a horse in a race.