As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB AND AFTER GEAR RETRACTION, CREW OBSERVED A RUBBER SMELL IN THE CABIN. EMERGENCY WAS DECLARED FOR LANDING AT DTW AND AIRCRAFT LANDED WITHOUT INCIDENT. AIRCRAFT WHEELS, TIRES AND WHEEL WELLS WERE INSPECTED, NO DAMAGE OR DEFECTS WERE FOUND.