This may be a old question, but i am going to replace my tires and am been hearing people putting 180 size rears on there liter bikes do any of you know if this is ok and does it hurt the bike any. Thanks for any help,

 

I thought 180 is what came on these? Anyways even if not yea the 180 is alright. I just put the pp2ct's on mine. the back is a 180/50

 

they come stock with a 190 the 180 will fit fine. Many people that love the corners and the track put on the 180 due to its smaller profile the bike is manuverable from side to side in and out of the corners. You really can't go wrong.

 

190/55 adds more contact patch on lean too.....

 

If the diameter of both tires (the 180 and the stock 190) is the same, then I don't think you'd have a problem. There's lots of people who do this switch, but IMO the bike might steer slower if the diameter is smaller on the 180.

 

go to 1000rr,net
there is a lot of talk about this

generally the consensus on the 180 is negative,

190/55 is liked better, because it gives you a better contact patch

here are some links from people in the know

http://www.1000rr.net/vb/showthread....light=180%2F55
http://www.1000rr.net/vb/showthread....light=180%2F55
http://www.1000rr.net/vb/showthread....light=180%2F55

just a few threads, they keep going from there some good some bad, basically the 180 turns in faster but is not as stable as well as the 180 was designed for a 5.5 inch rim while the 190 a 6inch/

 

Thanks guys for the help, i think i will just stay with a 190 i forgot to mention i double my wife quite a bit. Im still all ears as far as anyone else who wants to comment.