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Discussion Starter · #1 ·
Hey all,

Just looking at replacing my rear tire on the bike and curious about recommendations.

I currently have Michelin 2CTs with a high profile 180/55 on the rear, and really like the setup as it puts more rubber to the ground in hard turns.

The front still has roughly 80% or more left on it, but the rear needs replacing next season, and I'm contemplating a 190/55 for even more traction.

Anyone have experience with this size combo? I'm currently running the stock shock w/ a Kyle suspension link, but will very soon be swapping out to an Elka with ride height adjustment, and am not sure how the 55 will affect geometry.

Comments are appreciated!


Premium Member
6,495 Posts
Every time I install a new tire by a different manufacturer or type, I usually measure the circumference at a set tire pressure.
Then you can calculate the difference in diameter or radius.
Some tires are taller than others, both front or rear.

So far, the tallest 190/55-17 tire I've run is the Bridgestone BT-016 at 80.25" circumference at 38 PSI.
The Pirelli Corsa III 190/55-17 was 79.5" at 40 PSI, and the Conti RaceAttack Street 190/55-17 was 80.125" at 39 PSI.

The Pirelli Corsa III 120/70-17 front was 74.25" at 36 PSI while the Conti RaceAttack Street 120/70-17 was 73.375" at 35 PSI.
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