front tyre rotation

[stranger12]

Hi ,

So I changed my front tyre to Pirelli Angle GT which is their replacement for strada model( I am running strada at the back ).

I changed it because I had uneven wear across the tyre and some people suggested it could be because of doing to many knee down practices. I haven't so maybe the old owner has .


Anyway , when installing the new tyre, the tyre does not have a rotation written anywhere across the tyre which is very confusing .
It even confused the tyre shop staff .

So I went with my gut feel and installed it according to the pic below which the V shape is pointing toward the ground so that it can dispense water on wet ride.

However when having a more detailed look, on the side of the tyre I see few arrow shaped buldges which seems to suggest the way I have installed the tyre is the incorrect way as below .

Any ideas?

Out of interest , can the front tyre can be installed onto the forks either way and it does't have sides ? I checked the tyre and can not see a difference between left and right of the tyre/disc .

many thanks



How I have installed it

https://i61.tinypic.com/xm4nf7.jpg


Where the arrow is pointing which suggests the tyre has to be installed the other way


https://i58.tinypic.com/2zp2wyc.jpg
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[Nobby the Bastard]

If the tyre has a particular way it should be orientated, the arrow will be much more obvious than that.
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[Just_James]

I'd trust the arrow and get it swapped the other way about.... or contact Pirelli / supplier for confirmation

You're right in your logic for the tyre dispersing water and this is how the pattern would be fitted to a car. It is true for bikes too but on the drive (rear) tyre, it is now generally reversed on the front where opposite forces apply as it is the braking tyre. Keeping the same rotation on the front can cause irregular tyre wear

[TallPaul_S]

Google shows numerous pictures of the tyre the opposite way to how you have it.
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[FlightRisk]

I do believe the point of the V, at the contact area should be towards the front, so that water would be channelled back and to the sides away from the centre line.

So mounted the other way, basically. (Sorry)

That's my anyway.
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[Howling TerrorOutOfOffice]

Looking at the Pirelli website shows the tyre the other way around.
I'd be surprised if it didn't have direction arrows on it.
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[stranger12]

Hmm,

My old tyre looked the way this does in terms of how the v points. I emailed pirelli and waiting in their reply.


If i was to change it , can i just rotate the wheel ? In another word the wheel does not have side so need to take the tyre off and rotate it , correct?
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[stranger12]

Almost all pics on internet suggest i have fitted it the wrong way. Waiting on pirelli reply
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[Just_James]

[jeddy11]

The PR3 front look like their on the wrong way round too with the arrows facing backwards...
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[stranger12]

Cool , i have emailed them and will post back. Agree with every one here and think i need to rotate it but just waiting for final confirmation from them


Re rotating can i simply rotate the wheel without taking the tyre off and rotate?
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[Taught2BCauti...]

[Nemo]

Bit late now, but if the tyre was the wrong way round, the angel would be upside down?
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[Wull]

[stranger12]

I will have a further look but both sides looked identical to me and the axle cabs are exactly the same , no spacer speedo wire or anything.

It was a tyre shop and he was confused also . Why pirelli want to make people life hard? Cant they just show it?
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[Llama-Farmer]

If it turns out they are the wrong way round, take it back to whoever fitted them and explain, ask them to swap it round for free.
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[Fizzer Thou]

Does it say 'Made in China' on the sidewall like so many Pirelli tyres nowadays?
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[Ste]

The tread pattern direction looks wrong in the first photo and the second photo of the directional arrow confirms it.

Take it back to the place which fitted it and in the nicest possible way point out the arrow and ask them to fix it.

[defblade]

I'd reckon the wrong way around, too, sorry. My PR2 looks opposite to that, with the same effect.



Uneven tyre wear on the front is a result of the side of the road you ride on - if you drive on the left, the right hand shoulder wears faster, and vice versa. This is because on a right hand bend, you're always on the outside of the bend and going further. This adds up to a LOT more miles travelled on the right than the left, even though it doesn't seem like a lot.

it's nothing to do with road camber or knee-down (usually... ).
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[evoboy]

It is definitely on the wrong way round. Uneven tyre wear can be down to suspension settings or tyre pressures. Or in the case of Bridgestones, just being a Bridgestone.
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[iooi]

[binge]

Majority of bike rotational tyres are to be fitted like so:

https://scontent-a-lhr.xx.fbcdn.net/hphotos-xpa1/v/t1.0-9/10380969_10152903912960606_1664444798206037410_n.jpg?oh=aa4b44b677d2332cb2324d4430fa2d85&oe=550288F0



Rear tyre, the cuts/sipes are facing 'forwards'.
Front tyre, the cuts/sipes are facing 'backwards'.

[stranger12]

that is right, pirelli came back to me saying it was fitted the wrong way .

thanks all for your help and something new learned !
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[Ariel Badger]

It is on backwards, your rear tyre is under load when accelerating but your front is under load during braking hence the difference in tread orientation.
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