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120/70/17 instead of 120/60/17?!?!

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Old 08-25-2010, 08:30 AM
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Default 120/70/17 instead of 120/60/17?!?!

Hi guys,
I'm looking for new tires, and found a good deal on news tires. My questions is, my stock F3 accepts the following tires:

Front: 120/60/17
Rear: 160/60/17


The tires I found are:

Front: 120/70/17
Rear: 160/60/17


Is this going to be a problem? Will the bike handle completely different? What does the 70 mean anyway?

Thanks!
 
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Old 08-25-2010, 11:23 AM
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that tire is 120 wide and the height of the sidewall is 70% of the width(120). So its a bit taller than the 60.
 
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Old 08-25-2010, 11:26 AM
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The factory 120/60-17 tire is 120 mm wide with a ratio of 60% of it's width (120 mm) as the rubber height from the ground up to the wheel, and it fits onto a wheel that has a 17" radius.

Both tires are 17" and will fit on the wheel but they have different heights.

120 x .60 = 72 mm
120 x .70 = 84 mm

The taller 120/70-17 will have 12mm more rubber between the road and the wheel raising the front end by the same distance and transferring some weight to the rear. The tire is actually 24 mm taller in diameter if you were to stand next to it. Also as you add more side wall you get more flex in the tire.

There are reasons why the manufactures put certain size tires on bikes and you should not stray to far from them.
 
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Old 08-25-2010, 11:28 AM
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Yes the bike will handle different with a taller tire. Also I don't know if you have room to put a taller tire on it without rubbing on the front fender.
 
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Old 08-25-2010, 11:40 AM
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ALright.... i see.

Thanks guys. I'll stick to 120/60/17
 
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Old 08-25-2010, 04:56 PM
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I had a 120/60/17 on my bike and when I switched over to the 120/70/17, I felt it handled much better, but that is just me, an amateur
 
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Old 08-26-2010, 11:13 AM
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Originally Posted by halffast1g
I had a 120/60/17 on my bike and when I switched over to the 120/70/17, I felt it handled much better, but that is just me, an amateur
It may have felt better because it was new.
 




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