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Triangular tire profile wear

Gary856 said:
This was Pilot Road 4 at ~ 5k miles on my Super Duke 990. 34 psi, mostly twisty roads, and I'm a light braker. The wear didn't look too bad, but the pointy profile from side wear required more deliberate steering input. The bike wouldn't change lean angle smoothly. It would be interesting to have a tire shaver to re-shape the profile.
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Yes! Turn-in sucks especially on that bike with the triangle, I don't notice as much on the sumo - but that's a different type of riding altogether. The SD becomes a twitchy bastard with an abrupt and non-linear turn in feel. New front and it all makes sense again, for a few hundred miles at least.
 
All my tires do this. It just happens from taking turns. I kinda like it cause then the bike tips in faster.
 
Super common on front tires. I once got a great deal on a VFR because the seller hated the way it handled. Bought it, changed the front tire and it was great.

Mad
 
Marcoose said:
My front Q3+ wears more on the left. Maybe the way I turn left.
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for a given turn, taking it as a left is longer than as a right (if you drive on the right). if you're pulling an equal G load in each direction, that'll wear the left significantly more.

the smaller the radius of the corner, the more significant this is.

of course, if you do a bunch of freeway onramps/offramps those are mostly right, and can offset this.
 
norcalkid said:
I think a little more L wear is normal. Roads are slightly sloped to allow water runoff.
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Junkie said:
for a given turn, taking it as a left is longer than as a right (if you drive on the right). if you're pulling an equal G load in each direction, that'll wear the left significantly more.
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The last front Q3 (not plus), ~32psi, the left side was significantly more worn than the right side. The rest of the tyre still had plenty of rubber, but the left side was practically slick. That front tyre lasted 7K miles, which isn't bad, but using the proverbial 2-for-1, the rears have lasted 5-6K miles, so I was hoping for another 2-3K out of it. I know I have more trouble setting up left turns than right turns. I'm a bit uncomfortable riding too close to the fog line and often end up early apexing turning left. That's the way it is, I am very thankful I can still ride at all.
 
When making a left turn, the Coriolus Effect will cause you to have to push the bike harder to the left, thus causing more tire wear on the left side.
 
The Metzlers I had on my K12 used to do that every time.
Found out that Continental RA build a front specifically for BMW R12.
Tried those out on the K and had very good results.
Didn't turn into a hatchet and wore evenly at 38psi.
On the second front RA now and the results have been the same.
 
Just get new tires.

I once used to run Michelin 89X's on my ST1100 and I loved the more triangular front profile. It made transitioning into a turn quicker and lighter and once there, it really stuck to the road. I was bummed when they stopped making them.
 
ST Guy said:
Just get new tires.

I once used to run Michelin 89X's on my ST1100 and I loved the more triangular front profile. It made transitioning into a turn quicker and lighter and once there, it really stuck to the road. I was bummed when they stopped making them.
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I am trying the 2ct's on the superduke precisely to see if they wear better. But, as a previous poster mentioned, they had this specific problem with 2ct's. There doesnt appear a consensus on what tires do this and what dont (not that it necessarily is endemic to one brand and model of tire).
 
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scalloping == cupping. the condition u described is not that. scalloping is wear that is inconsistent around the circumference, making waves or ripples in the rubber. wearing one section of the tire evenly the whole way around is not that.

cupping is pretty common on moto tires towards the end of their life IMO. it can be mitigated by proper pressure and good suspension settings. but often the best performing pressures and settings are not the best for tire wear over a few thousand miles.
 
stangmx13 said:
scalloping == cupping. the condition u described is not that. scalloping is wear that is inconsistent around the circumference, making waves or ripples in the rubber. wearing one section of the tire evenly the whole way around is not that.

cupping is pretty common on moto tires towards the end of their life IMO. it can be mitigated by proper pressure and good suspension settings. but often
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the best performing pressures and settings are not the best for tire wear over a few thousand miles.
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Yeah, I went back and checked and I was incorrect about that.
Unfortunately, there doesnt appear to be a specific term. I suggest 'tire pyramid,' civilization specific for exacting purposes: mine are trending towards Egyptian about half way off mesoamerican. *note: this is not to be confused with stacks of tires in a pyramidal formation:
19.jpg
 
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Get your braking done before the corner if you want Mespoamerican. Trail brake deeper for Egyptian. :laughing
 
It is also possible that OP rides frequently on an older street with higher crowning in the middle creating the unusual wear on one side, but that side would have to be the left side of the tire.
 
Most of the time left side wears faster, so this one's unusual - Bridgestone BT016 on my KTM 950SM. Notice how straight the right side profile became where the red arrow's pointing. The left side wasn't as bad.

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I never had this happen on any of the Bridgetones I've run in the past 11 years but I have a set of Pirelli take offs currently on my bike and it's happening.
 
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