The bike: 2011 R1200RT
When I was installing a new rear Z8 on my bike a while back I noticed that the sidewall seemed to be somewhat more flexible than the tires that came off the bike (Z8's also). So at the national recently I talked to the people at the Metzeler trailer about the flexible sidewall & they told me that I should be using the "O" spec tires. First I have ever heard of that. The rear on the bike is a 180/55ZR17 73W which is the same tire that the www.BMW-Motorrad.com web site recommends (among several other brands) with no mention of the "O" spec. The Metzeler web site indicates that there is a "M & O" spec of the Z8 which have different compounds & better wet weather handling.Does anyone know if the "O" spec has a stiffer sidewall & is the "O" imprinted on the sidewall?