This is the Precision Aero Products Tail Wheel specifically designed for F3A models.
These wheels are machined from hard wearing delrin (POM) plastic and the tyre is a rubber O-ring. Similar to the now extinct MK tail wheel. We recommend gluing the O-ring to the Delrin with contact adhesive. If you need to replace the O-ring simply soak the whole wheel in mineral turpentine overnight. Alternatively, you could use CA but this is a more permanent adhesive.
The wheel suits a 2mm Axle but can be easily drilled out to suit larger axles. Also included is a push on star clip washer (suitable for 2mm axles) to retain the wheel. A wheel collar could also be used if so desired.
Weight is 2 grams.
Outside diameter 23mm.
Width at axle 6mm.
Width at tyre 4mm.
Note: Price is for the tail wheel only not the complete assembly. The assembly picture is just to show you what it looks like fitted to a tail wheel assembly.