Which way to fit tyres?

[jph]

Ok, I know I should really post this on a cycling forum but I thought I might get some more sensible responses here. I have just puchased a pair of new tyres for my bicycle. They are semi slick touring tyres designed for use on road. On the tyre wall it indicates to fit the front wheel with the chevron pointing forward and the back with it pointing backwards. As I see it the tread is there to force water out from under the tyre so the rubber gets a good grip on the road, having the chevron pointing back will force water and debris towards the middle of the tyres footprint.
This got me onto thinking about which way to fit a tyres on a land drived implement such as an old dung spreader. Should they point backwards?
My thinking is they should point the same way as the tractors to give the best grip. It being irrelevant whether the power is transmitted from tractor to ground or from ground to implement. What do you think.

John

[Tom]

It was explained to me when I asked the question about Chevron tractor tires that the direction had to do with "cleaning" as much as it had to do with traction.   A powered tire that had the "V" pointed forward would be packing stuff in the V and would not clean.  If the V pointed backward then the width of the rib would still give traction but the tread would remain clean because the dirt/water/mud etc would be pushed to the outside rather than trapped in the V.

Is that what you are asking?

[beenthere]

jph  not irrelevant, and I agree as Tom says;
So you would have the chevrons on the spreader tires pointing the opposite direction as the tractor tires. Sometimes, 4wd tractors and the like have the front tires reversed from the rear ones, because they are more assistance when backing up.
Hope this helps.

[ScottAR]

Powered tire= Arrows point the way.
Non powered=Arrows point where you been.

In a non powered app. the Vs should point to the rear as they last longer since double the tread surface on the leading edge.  HTH

[pigman]

ScottAR, You either have that backward or I wll have to change the tires on my tractors. Wait, I just had a thought , maybe you ment looking at the top of the tire. I was thinking of the marks in the ground. :P

[beenthere]

ScottAR
Do they do it that way in AR?  
Or are you meaning at the top of the tire rather than where the rubber meets the 'road'?
(as pigman beat me to saying)


See a pic of Roxie's Case 400 here
https://forestryforum.com/board/index.php?action=profile;u=1566;sa=showPosts;start=80

[Timburr]

John, Tom is definately correct about the self cleaning. When a powered chevron tyre is in contact with the ground, its self-cleaning abilities push the mud or water out sideways, thus giving it a deeper footprint and better traction. If the tyres face the wrong way you are effectively aquaplaning on the mud stuck in your lugs and the ground.
On a pushbike, the ground is driving the wheel under braking, so the chevrons need to be reversed to lessen lockup.

Tim

[wiam]

John,  On ground driven manure spreaders around here the traction tires are usually the opposite of the tractor tire.
Will

[ScottAR]

Sorry,  looking at the top of the tire.  Should have been more clear. 

Watch the AR comments, I'll arrange some education in Bruno!   ;D :D ;D :D ;D :D :D