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Post by doublert on Jun 19, 2013 20:09:42 GMT -5
As of now, I going to need to replace my tires soon, my factory tires are 130-60-13, My question is, can I run a 140-60-13 and gain some mph?
Thanks, Randy
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Post by hank on Jun 19, 2013 20:25:58 GMT -5
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Post by doublert on Jun 19, 2013 20:30:13 GMT -5
So what are the numbers and size that I would need to give me some more mph? is this possible? what about 130-70 13? |
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Post by sailracer on Jun 19, 2013 20:39:37 GMT -5
I like that link. A couple of weeks ago, I was looking for new rubber. The stock tires slipped too much. Anyway, I got the Michelin city grip 130 70 12's. Heres the thing. Michelin has that size as Rear. My scoot had the same size on front and rear, so I wanted to keep the same.The dealer said no problem, we mount the front reversed. Bikers say thats the right thing to do, Michelin says nothing of the subject. I think they are great, and as i dont go near 60 mph with it its ok, some would say no whats your opinion? |
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Post by hank on Jun 19, 2013 20:41:23 GMT -5
Hi
Even with the tallest tires you could realistically fit your only going to gain maybe a half to 1 mph more
and that a BIG maybe
For a higher topend your going to have change your gears
Take care and ride safely
Yours Hank
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Post by sailracer on Jun 19, 2013 20:42:16 GMT -5
I would say 130 70 13, but i don'tthink it will give you much gain
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Post by hank on Jun 19, 2013 20:43:00 GMT -5
I like that link. A couple of weeks ago, I was looking for new rubber. The stock tires slipped too much. Anyway, I got the Michelin city grip 130 70 12's. Heres the thing. Michelin has that size as Rear. My scoot had the same size on front and rear, so I wanted to keep the same.The dealer said no problem, we mount the front reversed. Bikers say thats the right thing to do, Michelin says nothing of the subject. I think they are great, and as i dont go near 60 mph with it its ok, some would say no whats your opinion? Hi I would say your good to go  ;D Take care and ride safely dear friend Yours Hank |
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Post by pmatulew on Jun 20, 2013 11:36:46 GMT -5
Tire mounted backward = Fail!  Two reasons: #1 - Depending on the construction of the tire, running it backwards can cause the internal structure to come apart. YMMV #2 - More importantly if the tire manufacturer marked it with a particular rotation direction it is likely that the tire has a directional tread pattern (some sort of chevrons like a farm tractor tire). The correct rotation direction will cause the tire to dig in and achieve maximum traction while braking. Turn it around the other way and it will be skittering all over when you need it most. |
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Post by sailracer on Jun 20, 2013 11:46:06 GMT -5
from what I understand , It is perfectly fine and acceptable (in my case) The arrow for direction has to do with the tread pattern. If the tire were mounted with the arrow, it would be wrong. I am not in any danger of shredding the tire, because i do not hit the high speeds for this to occur. The bike came with the same tires on both front and rear, same direction and tread pattern. I ALMOST LOST IT BECAUSE OF THIS! since the Michelins were installed, It handles great, and holds the road. So I would politely disagree. ;D Many bikers have also told me that reversing the tire was the right thing to do. I had my doubts, but the ride pretty much confirms that. Front and rear tread patterns are supposed to be opposite each other.
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Post by pmatulew on Jun 20, 2013 12:52:28 GMT -5
Smaller diameter wheels experience the same dynamic forces at lower road speeds as do larger diameter wheels at higher speeds, so that's not a valid argument. But your individual results will really depend more on the manufacturer and the specific way each model of tire was constructed. Sometimes you can get away with it, sometimes you can't.
While I don't doubt that the handling of your ride has improved with a better quality tire, it is more likely due to the construction of the tire carcass and the rubber compound than it is the specific tread pattern. Better rubber will completely transform the handling of a two wheeled vehicle.
As for the rotation direction we will agree to disagree. If it a non-directional tread pattern, do whatever you like. But I must maintain that if the manufacturer put an arrow on it, then it was put there for a reason.
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Post by sailracer on Jun 20, 2013 13:18:55 GMT -5
:DBeleive me, I felt the same as you do, and you are probably right.I did a lot if checking on this, and got more yays than nays.In this application, I guess the arrow refers to tread direction. Rear tires are more for gripping and pushing power, while fronts are more for braking forces.I didn't like the idea one bit, until I was re-assured by quite a few experienced riders and mechanics that it was ok
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Post by pmatulew on Jun 20, 2013 14:24:31 GMT -5
Hmm. Deep thought after further reflection. I think the source of our disagreement is not about using a specified tire correctly in it's correct place, but rather using a tire on the opposite wheel than it was intended. Most of my experience is on bigger bikes where the tires are not interchangeable so that was never a consideration before. After further research it appears that you are correct.  With a directional tread pattern the front tires are generally marked to account for braking forces and the rears are marked to account for acceleration forces. So if you're using the same tire front and back they should be opposite. Just make sure they are going the right way. Whether you are looking at the back of the bike or the front, the V's of the tread pattern should point up. |
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Post by sailracer on Jun 20, 2013 14:43:41 GMT -5
Yes, the treads are the correct way, but I too was concerned with the arrow, almost to the point where I refused it.I am satisfied with what the pros. have done.
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Post by geh3333 on Jun 21, 2013 1:41:37 GMT -5
I had a local morcycle shop mount my tires and they mounted them with the arrows pointing in the direction of rotation.
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Post by geh3333 on Jun 21, 2013 1:49:27 GMT -5
My shinkos say drive beside the arrow , meaning the arrow is pointed in the direction driven.
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