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BIKeINSTEIN · 15th July 2008, 18:38

^SS- my net is dicey- waiting for the pics.

Though if i have interpreted the above pics right, then the 2 tyres should be identical in pattern and markings except for the size.
Coz Michelin M45 was a unidirectional tyre for rear and mostly still is.

Earlier it used to have a few tiny arrows on the outer area of the tread.
And all arrows pointed in the same direction denoting the intended direction of rotation.
So one fitted the rear (usually a 3.00x18) as per the arrow- i.e. rear tyre rotates in the direction ofthe arrow.
The M45 for the front (usually a 2.75x18) was fitted opposite to the arrow.

The problem with those M45s was that many never saw the arrow and assumed it to be bi-directional and fitted it anyway they wanted.
Others used to look at the 'L' shaped designer lines or whatever on the sidewall and assumed it to be an arrow- problem being it pointed the other way round on the other side.
Also, since those tiny arrows were on the tread, they got scrubbed off after some running, especially after some corner-carving, donuts or stuff.
So unless the rider/mechanic instructed the tyre-fitter or the latter was aware of it from previous fitment based on the tread pattern, there wasn't a way to find the direction on a used tyre.

So maybe that's why they have two arrows on the same side of the sidewall now- one marking rear and one showing front.
Wasn't one enough- just indicating the way it should roll when fitted at the rear?

I hope and am quite positive it is that way.

The new two-arrow marking can also mean/suggest- that if fitted at the rear, it should roll in the direction of the arrow 'marked' rear and if fitted at the front, it should roll in the direction of the arrow marked 'front'.
Means we all were using it the other way round all this while.

But since i have seen the older tyres with single arrow that had no room for confusion, your present fitment at the rear is fine.

That's why i said they made it worse now if they have those two arrows on the same side of the tyre and the need for full pics of both.

15th July 2008, 18:38	#89 (permalink)
BIKeINSTEIN BHPian Join Date: Jun 2007 Location: Mumbai Posts: 98	^SS- my net is dicey- waiting for the pics. Though if i have interpreted the above pics right, then the 2 tyres should be identical in pattern and markings except for the size. Coz Michelin M45 was a unidirectional tyre for rear and mostly still is. Earlier it used to have a few tiny arrows on the outer area of the tread. And all arrows pointed in the same direction denoting the intended direction of rotation. So one fitted the rear (usually a 3.00x18) as per the arrow- i.e. rear tyre rotates in the direction ofthe arrow. The M45 for the front (usually a 2.75x18) was fitted opposite to the arrow. The problem with those M45s was that many never saw the arrow and assumed it to be bi-directional and fitted it anyway they wanted. Others used to look at the 'L' shaped designer lines or whatever on the sidewall and assumed it to be an arrow- problem being it pointed the other way round on the other side. Also, since those tiny arrows were on the tread, they got scrubbed off after some running, especially after some corner-carving, donuts or stuff. So unless the rider/mechanic instructed the tyre-fitter or the latter was aware of it from previous fitment based on the tread pattern, there wasn't a way to find the direction on a used tyre. So maybe that's why they have two arrows on the same side of the sidewall now- one marking rear and one showing front. Wasn't one enough- just indicating the way it should roll when fitted at the rear? I hope and am quite positive it is that way. The new two-arrow marking can also mean/suggest- that if fitted at the rear, it should roll in the direction of the arrow 'marked' rear and if fitted at the front, it should roll in the direction of the arrow marked 'front'. Means we all were using it the other way round all this while. But since i have seen the older tyres with single arrow that had no room for confusion, your present fitment at the rear is fine. That's why i said they made it worse now if they have those two arrows on the same side of the tyre and the need for full pics of both. Last edited by BIKeINSTEIN : 15th July 2008 at 18:57.