The Honda PCX / Forza / ADV150 / SH Forums

wojtek_pl wrote:If that is an arrow on the picture (bottom part of the tire, after "Michelin" and "front"), it is pointing correctly. But check for, perhaps, more direct mark on the tire (like "Rotation --->" )...

That is the arrow, i checked both tyres and the arrow is pointing that way. But thanks for the help.

On the right side of the bike,( side with throttle) the arrow is pointing clockwise. Anti-clockwise on the left side of the bike.

Alibally wrote:On the right side of the bike,( side with throttle) the arrow is pointing clockwise. Anti-clockwise on the left side of the bike.

Jesus h Christ. Don't turn it into a Mensa test for them.

A lot of the confusion comes from the arrows that are known as the "chevron" or the "tread" of the front city grip tire pointing to the rear of the bike. As the tire rotates to the pavement while going forward, the grooves (chevron) would appear to push any water toward the center of the tire. Building up a channel of water in the center of the pavement/tire contact area would logically seem like a really f'n bad idea, unless you're piloting a hovercraft. So why do the michelin tires channel the water to the center? (or do they?) How do they overcome what appears to be obvious physics? I'm not trying to poke the bear, just interested in the answer.

The tyres (or front) seems to fitted correctly in the prior pics, and to my mind it seems to be the way it needs to be to dispel water (the tyre manufacturers know what they are doing). Think of it as the tyre leaves the road and is spinning to the rear of the bike - the water in the middle (where the angled tread comes to an end) is pushing water down the grove and out towards the outer edge due to rotational forces).

iceman wrote:The tyres (or front) seems to fitted correctly in the prior pics, and to my mind it seems to be the way it needs to be to dispel water (the tyre manufacturers know what they are doing). Think of it as the tyre leaves the road and is spinning to the rear of the bike - the water in the middle (where the angled tread comes to an end) is pushing water down the grove and out towards the outer edge due to rotational forces).

I have been doing precisely that for 30+ years. Are you looking at he front City Grip? If the pattern starts wide as it comes to the bottom (spinning forward) then narrows to the center, the water will be pushed to the center. Bicycle tires always do the opposite to avoid pushing water to the center. Why would a scooter tire be any different?

vamootsman wrote:A lot of the confusion comes from the arrows that are known as the "chevron" or the "tread" of the front city grip tire pointing to the rear of the bike. As the tire rotates to the pavement while going forward, the grooves (chevron) would appear to push any water toward the center of the tire. Building up a channel of water in the center of the pavement/tire contact area would logically seem like a really f'n bad idea, unless you're piloting a hovercraft. So why do the michelin tires channel the water to the center? (or do they?) How do they overcome what appears to be obvious physics? I'm not trying to poke the bear, just interested in the answer.

My thought exactly... That's why I asked. Though it's not the first tire I see mounted "backward" in the front. So maybe it has to be that way ?
Anyway, stay with the manufacturer directions !

Perhaps it works better on the dry roads and You are not supposed to drive when wet

vamootsman wrote:

iceman wrote:The tyres (or front) seems to fitted correctly in the prior pics, and to my mind it seems to be the way it needs to be to dispel water (the tyre manufacturers know what they are doing). Think of it as the tyre leaves the road and is spinning to the rear of the bike - the water in the middle (where the angled tread comes to an end) is pushing water down the grove and out towards the outer edge due to rotational forces).

I have been doing precisely that for 30+ years. Are you looking at he front City Grip? If the pattern starts wide as it comes to the bottom (spinning forward) then narrows to the center, the water will be pushed to the center. Bicycle tires always do the opposite to avoid pushing water to the center. Why would a scooter tire be any different?

Looking at both the front and rear on those picks - they seem to be correct for water disposal - as both tyres rotate out from road contact, the wheel is spinning one way and the water will be forced along the groves the other as it's under force/pressure. Hence it will make it's way along the ridge to the outer edge. Unless I (and Michelin) have that wrong . I've looked at the pics/tread several times and that's how it would seem to work to me.
If the tread was pointing the other way, then as the wheel rotates off road contact the water will be forced along the tread towards the center.

iceman wrote:

vamootsman wrote:

iceman wrote:The tyres (or front) seems to fitted correctly in the prior pics, and to my mind it seems to be the way it needs to be to dispel water (the tyre manufacturers know what they are doing). Think of it as the tyre leaves the road and is spinning to the rear of the bike - the water in the middle (where the angled tread comes to an end) is pushing water down the grove and out towards the outer edge due to rotational forces).

I have been doing precisely that for 30+ years. Are you looking at he front City Grip? If the pattern starts wide as it comes to the bottom (spinning forward) then narrows to the center, the water will be pushed to the center. Bicycle tires always do the opposite to avoid pushing water to the center. Why would a scooter tire be any different?

Looking at both the front and rear on those picks - they seem to be correct for water disposal - as both tyres rotate out from road contact, the wheel is spinning one way and the water will be forced along the groves the other as it's under force/pressure. Hence it will make it's way along the ridge to the outer edge. Unless I (and Michelin) have that wrong . I've looked at the pics/tread several times and that's how it would seem to work to me.
If the tread was pointing the other way, then as the wheel rotates off road contact the water will be forced along the tread towards the center.

I have looked at loads of photo's across the internet of people who have had the Michelin city grips fitted to their honda pcx and all there treads are fitted the same as mine. So it must be correct.

iceman wrote:

vamootsman wrote:

iceman wrote:The tyres (or front) seems to fitted correctly in the prior pics, and to my mind it seems to be the way it needs to be to dispel water (the tyre manufacturers know what they are doing). Think of it as the tyre leaves the road and is spinning to the rear of the bike - the water in the middle (where the angled tread comes to an end) is pushing water down the grove and out towards the outer edge due to rotational forces).

I have been doing precisely that for 30+ years. Are you looking at he front City Grip? If the pattern starts wide as it comes to the bottom (spinning forward) then narrows to the center, the water will be pushed to the center. Bicycle tires always do the opposite to avoid pushing water to the center. Why would a scooter tire be any different?

Looking at both the front and rear on those picks - they seem to be correct for water disposal - as both tyres rotate out from road contact, the wheel is spinning one way and the water will be forced along the groves the other as it's under force/pressure. Hence it will make it's way along the ridge to the outer edge. Unless I (and Michelin) have that wrong . I've looked at the pics/tread several times and that's how it would seem to work to me.
If the tread was pointing the other way, then as the wheel rotates off road contact the water will be forced along the tread towards the center.

The rear yes, the front, absolutely not. I know that's the way they are supposed to be run, but I have yet to hear the reason from Michelin for their front tire siping to channel water to the center.

Hello gentlemen,
I am slightly confused and want to make sure before a buy of new tires:
is this size is correct for my PCX 125, 2015?:
front 100/90/14 + rear 110/80/14 or front 100/80/14 + rear 110/80/14

90/90 x14 front, 100/90 x14 on rear on mine.