I tried every which way to equip them.

Tried:

1. Taking them out of my wardrobe and putting them back in
2. Taking off all clothes. Press Wear. Open new page to see if I wear nothing. Put wheelies back on. Press Wear. Open new page but still no wheelies.
3. Opening wardrobe in-cognito mode. Wear nothing in cognito made. Press wear. Wear wheelies in cognito mode. Press wear. Still no wheelies when checking the site in a new tab.

Is anybody else unable to equip cream wheelieblades or is it just me?

This solved it: 4. Remove from wardrobe and put in inventory. Open Wardrobe. Wear different shoes. Press Wear. Close wardrobe. Put wheelies back in wardrobe. Open wardrobe again. Remove shoes. Press wear. Equip Wheelies. Press wear.

It's a HASSLE, but hey at least I have my wheelies on LOL

Hopefully this will help others who have troubles with equipping things!

sometimes wearables newly added to the wardrobe can take several minutes (to several dozen minutes) to show up on your avatar. presumably because the system doesn't let your avatar wear items you don't own, and there's a some internal lag or otherwise a delay going on.