Who do ya love?
Thanks for your inquiry on Avon Vintage race tires.
I assume that you are running # 4560 (AM20 90/90-18) on the front and # 5429 (AM22 110/80-18) on the rear.
The new part number for the front tire is # 11376, slightly softer compound for more grip.
As far as your rear tire goes, you may want to try the AM22 110/80VB18 front # 11382.
this is the front version of the AM22 rear that you are using and is a softer compound.
If you do use this tire, make sure to reverse it's rotation for rear fitment. It is very common to run a front tire on the rear.
Let me know if you should have any other questions. Thanks !
John Leach - Sales / Racing Support
Avon Motorcycle Tyres North America
c/o Hoppe & Associates
407 Howell Way
Edmonds, WA 98020
Avon Tyres, your only contact with the road ! !