Hello all,
I ride a 2001 cbr f4i. with a stock 120/70/17 up front.


This is an inquiry about how rear tire size affects my lean angle.

I am hoping someone can shed some knowledge on this topic for me. Before I ask and get flamed. Yes i know the stock rear tire sizes and I know that stock tire size is 180 wide. I get that a wider tire does not necessarily offer more cornering grip, just heat capacity. That being said,

So, currently I have a 170/55 (Michelin pilot 4 gt) rear tire on my bike and it turns in great and I can lean very confidently. I am getting wear all the way on the edge of the tire so i figure that I am using it effectively. I need a new rear soon and I am wondering this. If i get a 180/60 rear tire instead, will it change my bikes lean angle when cornering? Will I have to lean the bike more or less for the same corners? I ask because I have a crash cage on it and I would like to set up the bike (tire wise) so I can corner confidently with as little bike lean angle as possible. I get that tire profiles differ and may be influence. But for sake of it lets say same tire and same manufacturer. i also get that turning may be slower and require more effort on my part. But please explain if you can.
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Basically, What tire do i get to NOT SCRAPE 180/60 ( 180/55) or a 170/55?

Please let me know if my question is lacking or otherwise.

Thanks