What about tyre running in the opposite direction?

[silva]

Your heavy bike and fixed gear situation is esoteric. Why don't you try asking this on the 'fixed' sub-forum?

Eso.. what?
Why would I, the tyre isn't erosotonic - has nothing to do with fixed gear.
My heavy bike is just for fun, people first show :O faces when I pass them bridge-up with a ton stacked on top of the rear, then women laugh their ass off and the men shortly after, not seeing the humor but still laugh with a stupid-look just because the women laugh and they think it's then their job to laugh too.

 

[silva]

Lots of tyres with minimal tread have these arrows, and I think @Milkfloat 's suggestion is better than most for this sidewall embellishment.
The OP's tyres aren't "heavily treaded" and you can also assess the nature of the arrows mentioned.
But switching them round might affect how effectively the tread pattern clears the water away and avoids aqua-planing .
View attachment 510163

You watched too much Disney Channel.

 

[screenman]

I wonder if the rear wheel is running straight.

 

[PpPete]

I wonder if the rear wheel is running straight.

Or the frame out of alignment?

 

[screenman]

Or the frame out of alignment?

Yep! A bent frame would have the wheel running at an angle causing uneven wear.

 

[Yellow Saddle]

Eso.. what?
Why would I, the tyre isn't erosotonic - has nothing to do with fixed gear.
My heavy bike is just for fun, people first show :O faces when I pass them bridge-up with a ton stacked on top of the rear, then women laugh their ass off and the men shortly after, not seeing the humor but still laugh with a stupid-look just because the women laugh and they think it's then their job to laugh too.

What are you drinking?
Nevermind, I'm sticking to Corona.

 

[silva]

I wonder if the rear wheel is running straight.

The distance brake pads - rim side is about the same left/right.
Flipping the wheel places one brake pad closer, which means the spokeswork has been done fine, since the spokes flanges - center sits 5 mm away from the frame dropouts center.
If I hold a 10 cm wide and 1 cm thick multiplex with the 1 cm side towards the bike, as high as possible along front and rear wheel, they appear to be in line, although I think this is very rude so not that reliable.
Yet, the rear tyre wears out of center, and either I have a leg shorter than the other, either it's due to resisting pedals to slow down mostly along the right one, because it's hard to concentrate on both simultaneously.
That's all I can say. Can't think of other reasons. I could rout out the one leg shorter by sitting backwards but then people with yellow saddles will ask what I drink and get the flu.

 

[silva]

What are you drinking?
Nevermind, I'm sticking to Corona.

Btw since a month I'm riding with a 1/4" motorcycle chain.
Just shows, I don't need drinks or corona to go wweeeeww.

 

[silva]

Yep! A bent frame would have the wheel running at an angle causing uneven wear.

In 2018 I did smash into a cars driverside door but your scenario would switch the positions no?

 

[silva]

300 km later can't say I notice anything different with the tyre running opposite.
Didn't have wet roads yet, though.
I paid attention to what I do when resisting pedals to slow down.
I noticed again that I mostly tend to resist/slowdown along the right pedal.
When doing that, I hold the bike under an angle to the left. This conforms with the left from center wear off the tyre.
What I also noticed is that my right pedals bearing is more worn than the left - I can clearly move it more up and down.
About the wear itself, there are sections on the circumference that are clearly more worn than others. Abit like the so called skid patches. There are quite a number of them, which could be explained as the tyre having been removed several times and not placed back in the same relative position to the rim.
Maybe I need to learn another technique to slow down, that evens left/right pedal usage. Never really thought about it until now. It's just surprising to see such an effect on the tyre.

 

[Globalti]

Manufacturers put treads on road tyres to reassure buyers who think a tread is necessary. It's not, as millions of riders on slick tyres will testify. They put a directional tread on for the same reason but with the possible exception of certain patterns, off road, it makes no difference. They put a direction arrow on for similar reasons but also to ensure that the tyre brand can be seen from the right side of the bike.

 

[silva]

A followup:

Juni or so 2024 I discovered frame broken at the driveside tube that connects bottom bracket to rear axle, and in my case has a slot piece in it to allow inserting a belt.
I got a replacement frame 3-4 months later and assembled everything back together.
The rear outer tyre Schwalbe "Super-Moto-X" has now worn towards one place a little peek green anti leak stuff.
Didn't catch it earlier, but while checking tyres I now did: the wear is now precisely symmetrical.

So it looks like there was something wrong with the frame at purchase time (2017).
At some point I even started to think that it was due to a habit of resisting pedals more with one leg than the other and I started to pay attention to it, with no effect.
A rear tyre lasts about a year, so I have replaced them about 6 times, now would be the 7th, and it's the first that wears normal

Also new, maybe related, the middle still has profile, the sides not, while I keep it at the same pressure as before. It may be a normal thing for wide (62 mm) tyres - I've noticed this at mountain bike tyres from other people, only that due to the whatever was wrong with the old frame upon acquiring the bike, it had been else for me.

And while I type this, I start to wonder, the bike showed a weird instability, already noticed at the first test ride from the dealers shop and back - I had to pay much more attention when riding, and dealer couldn't explain it.
The instable feeling (it was like difficult to ride just straight) suddenly vanished after putting a basket with some 3-4 kilo stuff on top of the rear rack, so I didn't consider it anymore as a problem.
Taking away that stuff again, and the instable feeling returned, proving that this weight on top of the rear rack made the difference.
So as soon as I get the chance, I'll remove it and check.
If it doesn't make a difference, then whatever was wrong with the old frame also caused that instable feeling.

 

[Alex321]

Very convincingly. On a road bike tyre it makes not a jot of difference.

It very clearly DOES make a difference with SOME road bike tyres.

With marathon+, if they are the right way round and you go through water, the centre of the tyre will be dry within a few yards, if they are the wrong way round, it will take 2-3 times as far before they are dry. This is speaking from personal experience.

With tyres which have very little tread (as is true of most road tyres but not all), it will indeed make no noticable difference.

 

[presta]

The grooves in the tread are angled so that they drive the water from the centre to the edge of the tyre, and not from the edge to the centre.

 

[MontyVeda]

The grooves in the tread are angled so that they drive the water from the centre to the edge of the tyre, and not from the edge to the centre.

...and on a bicycle, what would be the consequence of this happening?