I didnt want to shit up Jespo’s thread… his tires are a decent deal. ANYWAY.
The stock rear tire on your GSX-R600 is a 180/55-17, and by installing the 190/50-17 you’ve changed geometry significantly. Not only is the 190/50 wider with a lower profile, but also by squeezing it onto your bike’s 5.5-inch rim-rather than the 6.0-inch rim it’s intended for-its shape is distorted even more compared with the proper tire. The picture shows how the 190 tire is pinched onto the narrow rim. Replace it with a proper-sized tire and your bike’s handling should be restored.
http://www.sportrider.com/tech/how_to/146_0806_thrust_horsepower_rear_tire_handling/index.html
[quote=“Willybeen”"]
GLWTS… 90% of the people on here wont notice the difference…
some of the racing guys say the wider tire, creates a larger contact patch, thus creating more grip and allowing the power to be put down.
The problem is the rim isnt wide enough to fit the tire the way the tire was made. meaning if you run a 180 tire on a 190 size rim (6 inch), you are flattening out the tire, which increase the rake angle and actually changes the geometry of the bike. If you do the opposite, a 190 tire on a 180 rim (5.5 inch i believe) you are increasing the height of the rear of the bike thus decreasing the rake and making the bike more unstable due to the decreased rake angle. This can make the bike much more likely to go into a tank slapper or wobble.
Again for 90% on here who just ride the street, that fine, but as for me, I trust that in the millions of dollars spent on R and D on these bikes, the engineers would have enough insight to get the right size tires on their bikes.
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