Disc brake of floating caliper type

A disc brake of the floating caliper type for a vehicle wheel, comprising a rotor arranged to rotate together with the wheel, a pair of friction pads each positioned on an opposite side of said rotor, a support structure having a hole therein and supporting said pair of friction pads, said support structure having a slotted portion opening from and extending laterally from the hole formed therein, said support structure arranged to be fixably connected to a vehicle body, a caliper having acting and reacting portions arranged on opposite sides of said rotor for bringing said pair of friction pads into engagement with said disc, said caliper including first and second laterally spaced receptor holes formed therein, a first guide pin secured to said support structure and slidably received in said first receptor hole of said caliper, a single second guide pin, a nut threaded on said second guide pin and rigidly securing one end of said pin within said laterally slotted hole in said support structure and the other end of said pin engaged in the second receptor hole formed in said caliper, said first and second guide pins slidably guiding said caliper in the axial direction of said rotor, a sealing means secured between said second guide pin and said second receptor hole for sealingly enclosing said other end of said second guide pin, said caliper along with said second guide pin and said sealing means being pivotally rotated about said first guide pin with said second guide pin moving through said slotted portion outwardly from the hole in said support structure toward the lateral periphery of said support structure to expose said pair of friction pads for removal and replacement when the securement of said second guide pin to said support structure is released by loosening said nut.