27.5"x2.25" Ouster Bicycle Tire Genuine Buddy 125 Here is the OEM replacement

Here is the OEM replacement rear transport chair caster wheel for the Drive Aluminum transport chair

but the blemish means that you can save a few bucks off of the price

The shroud is unique to the ZooMe R3 (R318CS) 3-wheel scooter and does not fir the ZooMe R4

Currie Technologies: AS-7507-BLK

and sells at a lower price for an even better value

27.5"x2.25" Ouster Bicycle Tire Genuine Buddy 125 Here is the OEM replacementThe tall, open center tread keeps the mud on the ground and off your tires, and grips roots and rocks while climbing. SC Single compound, one compound throughout the tread optimized for longevity and performance. CST Premium: TB90982100