We do not use them on the Porsche as we run inserts to complete the Scale look.
However you certainly can mount Scaleauto sponge to these and true up. With these front and rear the cars would look stunning.
Not at the Warehouse yet so do not have all the part numbers to hand but you would run the 13mm wide rim if memory is correct 20 mm diameter.
SC-4204 “RAD-1” Design for 3mm. Axle. M3 screw actually 21 mm. These are nopt in stock yet but coming soon Retail $25.99 plus sponge.
The wheels/tires we use for racing Retail for $18.99 and can take the stock insert so complete the "Scaleracing" look.
Shown here without the insert fitted.
Hope this helps.
See you at the races.