Kurosai FR-U IV

The Black Rhino FR-U IV is one of the newest additions to the Thousand Sunny's Soldier Dock, residing in the previously unoccupied Dock 4.

Design
It is a giant black motorcycle with three wheels and the armored head of a rhino. It is very powerful, and capable of barreling through multiple enemies. It has the trademark star on the two back wheels. It is made of Wapometal.

Fishman Island Arc
When the New Fishman Pirates' Hyper Toxin Squadron tried to poison Nico Robin, Franky drove the motorcycle out to run down the squadron, having immunity from the pricks and poison. A giant fishman tried to smash Franky and the bike with a giant flail, but was taken down by another new addition to the Soldier Dock, the Brachio Tank V.