Thank´s for the link, GlenF. Very helpfull and a good read!
Finally a mechanic sucesfully managed to get the AM26s on my whels without doing anything wrong. Amazingly three attempts were necessary: first time sidestroke, second time air loss. I noticed that climbing up the Grossglockner!
http://www.grossglockner.at/en/Now there on, and are a major dissapointment. To my surprise I´ve got a high-speed wobble now! Indeed with the ancient stock profile not very swift leastwise rock steady straight, Precious now tends to wobble when sidewinds hit or the surface get´s uneven. She even takes this wobble along when getting inclined! I suspect I found a reason, if not
the reason for the C5´s lack of stability over 100 km/h. I may repeat, since the BT45 is available there is really no reason to take another tire for the C5.
Otherwise these modern AVONs are quite well, adhesion seem to be more than enough and due to the round profile of the rear tire she feels better when heavily inclined. That´s the only outstanding advantage over the stocks, though.
The wobble gets much worse when the front´tire´s pressure is increased. I tested 1,3 bar to 2,0 bar in the front and it gets better with less air. I even tried 1,0 bar and the straight running ability gains, but the cornering stability suffers.
At the end I cannot recommend the Avon AM26, for I don´t see a desirable improvement. I´m not sure if I like to keep them. Regards
Maturin