When I put new
Tryes on the 350 Sport, I obtained various advice on size and make.
In the end I went with the recommendation of Alex at NLM, who has one
of the fastest Morinis around and has tried a lot of tyre combinations.
90/90-18 Front AM20
110/90-18 Rear AM21
prefer Bridgestone BT45's, and there dosn't seem to be much to chose
between them. The Avons were in stock locally and slightly cheaper.
Roadrunner has now been superceded by the Roadrider!
A 100/90 is
listed as the correct fittment on the front of some models, but I
feel it's too wide. Morinis run really quite narrow rims and modern
tyres have gotten wider, even if they have the same numbers on the
sidewall. The 90/90 is already the widest tyre most manufacturers
recommend be fitted to the 2.15" front rim.
I found a 350
Sport fell into very slow corners (i.e. around town) with a 100/90
front tyre, which was a little tiring. The 500 doesn't seem to do
this with its longer wheelbase, but there's probably no advantage in
the wider front.
Tyres that are
too wide do nothing for the handling.
The 250 was a
little more tricky to find tyres for. The 2.75 Front and 3.00 Rear
sizes are reasonably common, but not in nice soft grippy compounds,
most are 'Milleage oriented'.
In the end I
found the Metzeler ME22 to be a good tyre.