Heidenau k44 on the front. I race on the K44R on a A65. 3.25-19
Ribbed and modern.
More tire than you will ever need.https://www.heidenautires.com/product/k-44/
Match it with a k34 on the back.https://www.heidenautires.com/product/k-34/
Bigger is not always better. 3.50-18 (?) on back.
I race the K34r 3.50-19 also on the a65 rear and I have K34s front and rear on a street 1964 Lightning rocket. On the street bikes I run 24 psi front and 26 psi rear. High pressures cause the Front K34’s to wander on rain grooves. Lower pressures cure this.
My 1963 A65 Star has 3.25-18 and 3.50-18 K34s on it. Pleasure to ride.
These tires have a round cross profile when compared to a K70. So the handling of the Heidenau is quite neutral on roll in or rollouts. The lightning rocket and the race bike are quite flickable if you know what I mean.