Is the office on the same property as the warehouse? If so, tell you're old friends (or supervisor) that you wish to retain your old "warehouse slave" privileges so you can continue riding to work.

If this works, don't forget to bring a pizza from time to time.

Otherwise, speak to management, explain the situation, and work something out. What that entails, and how much you need can vary form just a place to store a change of clothes, or a place to clean up, shower and change, plus store the bike, edpending on the specific details involved.

I've never known a situation that couldn't be worked out if both parties wanted to. However my perspective is different because I've been the boss most of my life.