Lets see if I can do this :
Only 4 gallons , but I've have read the V-9 gearing lends its self to better MPG than the "Zipper" V-7 does , well the V-7 got about 55mpg on todays ride . So the V-9's fuel light comes on about 180 miles , and the V-7's light comes on about 200 miles. European fuel prices must be higher than our's ,

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Only 1,200 miles
I think 150 tire width is a bit much but it would be nice for the rim to be wide so the tire fits flat on the road . So , I'll check rim width after wearing out the original tire . A narrow tire on a wide rim seems like a good idea to me .
My first experience with 17" rims has been educational enough there might not be a second !
I didn't think about it before jumping in , but "I've seen the Light"
I suspect that "Cruiser " bunch will never keep up with anybody that has been to the "OldFeller School of Dragon Slaying" !
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Springman , the easy assure is : I'll see if I can find out ?