Abstract: A mounting bracket used to mount a crossbar on a handlebar of a bicycle, motorcycle or similar vehicle. Two of the mounting brackets, one at each end of a crossbar, are used to mount the crossbar on a handlebar. Each mounting bracket has a sleeve portion that fits around the handlebar. The sleeve portion is clamped to the handlebar by a first bolt passing through apertures in clevis arms extending outward from the sleeve portion that are integrally formed with the sleeve portion. The crossbar has a lug at each end thereof. Each lug of the crossbar is secured between the clevis arms of a corresponding one of the mounting brackets by a second bolt that passes through apertures in the clevis arms and the lug. The first bolt is located between the end of the lug and the handlebar, and the second bolt is located between the end of the lug and the ends of the clevis arms.