This is the MotoTec Universal Parts 8 1/2 x 2 SOLID HONEYCOMB TIRE, 154-337 flat-free tire for Xiaomi stand-up electric scooters, GoTrax scooters and many others. Xiaomi is the supplier for scooter share service Bird. Compatible with 50/70-6.1 and 50/75-6.1 tires.

Product Specifications:

• SKU: 154-337
• 8 1/2 x 2
  
• Tire Inner Diameter: 6.1 Inches
  
• Compatible with 50/70-6.1 and 50/75-6.1 tires