Well I guess Matt didn't get time or forgot so below is what he sent me via e-mail, I'm posting this because he said he was going to post this on the site.
Look at the dates for the changes.
Avon applies new technology to boost performance on 250/40VR18 & 300/35VR18 Cobra AV72
MELKSHAM, UK, 10 June., 2014 – Avon Tyres has announced updated tread compounds to its 250/40VR18 & 300/35VR18 Cobra AV72 tyres, using new developments in technology to deliver the highest quality products to its customers.
The new technology is set to further improve and enhance the tyres’ durability, boosting their overall performance.
The update in compounds took place in September 2013 – 300/35VR18 and December 2013 – 250/40VR18
Our Cobra range is aimed at the power cruiser/touring/custom market with these 2 sizes being popular on American Ironhorse, Big Bear Chopper, Big Dog, Victory and Steed Motorcycles.
For more information about Avon motorcycle tyres, or to locate your nearest dealer, please visit:
www.avon-motorcycle.co.uk