Metzeler ME11-ME77 Classic

[Chris400F]

I knew I'd seen the information somewhere ....
Page 7 of the linked document has a table of recommended rim sizes for given tyres (or tyres for rims, depending how you read it ....):
http://www.maxxis.co.uk/media/65556/2013-Motorcycle-Tyre-Catalogue.pdf

[Bullit]

So if I'm reading that right you've gone one size over their recommendations? The chart says 80/90 for a 1.6 but you've gone 90/90 which the chart says should go on a 1.85 rim

[Chris400F]

You're absolutely right! And the same goes for the rear, which is a 1.85 rim.
I hadn't actually read the chart, I had seen it in when looking for other stuff so posted the information.
I just went with the sizes recommended on the Avon web site when I bought my tyres.
Looking at Maxxis and Metzeler they both seem to offer 100% aspect ratio tyres i.e. 3.00-18 and 3.50-18.
If you look on the Bridgestone site they say to use a 90/90-18 or 3.00-18 on the front and a 110/90 or 4.00-18 on the rear.
Not sure what to make of the chart now.

[beemsquar]

I agree, if you look further back in this post you will see Metzelers reply to my email asking the same thing and they recommended a 90/90 as they don't do the original size for the front, but they said to me on the phone that I will have no issues fitting a 90/90.

 Other tyre fitting places I spoke to wouldn't fit anything other than the original size tyres to my rims.  On the other hand there are hundreds of threads with people fitting 90/90 and 100/90's on the net and I haven't seen one about people having problems after doing so. 

I was advised by many to stay clear of anything larger than above as it would cause steering issues, could make the bike lean over too far on the sidestand, as well as affecting the speedo etc.

each to your own I guess.

[Bullit]

So it seems to be each manufacturer has their own recommended tyre/rim combo

Been trawling the net and I think I'll stick with the standard sizes lol. Thank you for all your input and help 👍