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Old 09-01-2019, 06:30 PM   #1
Pete_G
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Tire wear question.

I developed a raised edge on my rear tire tread (picture attached) today after 2 days in the canyons. A buddy told me this could either be:

a) Low tire pressure (I'm running 32 PSI on Dunlop Q3+ rear)
b) Rebound damping on rear shock is too fast.

Any input is appreciated. Thanks!
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Old 09-01-2019, 07:39 PM   #2
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Check out Dave Mossí web site, he seems very in tune with reading tire wear.
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Old 09-02-2019, 06:56 PM   #3
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32psi seems a bit low to me. Unless your at the track.
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Old 09-03-2019, 04:46 AM   #4
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I get the same thing. I'm no tire wear expert but I believe it's simply from accelerating. I run 40-42psi rear for street/canyons.

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Old 09-03-2019, 10:05 AM   #5
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.. You guys have a lot of air in those tires lol. I normally run 33psi on S21. When I put more air in the tire I just didn't have the confidence in the tires.
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Old 09-03-2019, 01:35 PM   #6
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I also run my S21s 36/33.
One site said for that wear rebound dampening to fast.
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Old 09-03-2019, 03:21 PM   #7
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I get very similar wear on my Duke 690 with Pirelli Diablo Rosso Corsa II. I set 32-33 psi cold as I do not like my pressure getting above 36-37 psi when hot. I think it is normal wear.

That definitely is not cold or hot tearing which is more visibly noticeable.
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Old 09-04-2019, 12:10 AM   #8
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I usually go by the owner manual's guide but I do like to experiment some. It says 36psi front and 42psi rear. I tried 32-38psi front and 34-43psi rear (Q3 120/190 ), but finally settled right back at the factory suggestion. The lower pressures did nothing for me but lower my tire life. (Spirited twisty road riding not track.)
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Old 09-04-2019, 09:03 PM   #9
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Quote:
Originally Posted by UV1000 View Post
32psi seems a bit low to me. Unless your at the track.
I think you're right.
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Old 09-04-2019, 09:05 PM   #10
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Quote:
Originally Posted by UV1000 View Post
I usually go by the owner manual's guide but I do like to experiment some. It says 36psi front and 42psi rear. I tried 32-38psi front and 34-43psi rear (Q3 120/190 ), but finally settled right back at the factory suggestion. The lower pressures did nothing for me but lower my tire life. (Spirited twisty road riding not track.)
I'm going to try to put a bit more air this weekend and see how it feels.
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Old 09-04-2019, 09:49 PM   #11
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Quote:
Originally Posted by UV1000 View Post
I usually go by the owner manual's guide but I do like to experiment some. It says 36psi front and 42psi rear. I tried 32-38psi front and 34-43psi rear (Q3 120/190 ), but finally settled right back at the factory suggestion. The lower pressures did nothing for me but lower my tire life. (Spirited twisty road riding not track.)
Hey UV! I've seen you ride.... you're telling me that you run 36/42 out there on ACH?
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Old 09-04-2019, 09:56 PM   #12
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Quote:
Originally Posted by mikesx4911 View Post
.. You guys have a lot of air in those tires lol. I normally run 33psi on S21. When I put more air in the tire I just didn't have the confidence in the tires.
I with ya in this one! I've been running the new S22 @ 33f/35r cold pressures(Dave Moss rec. tire specific pressures for street) for canyon runs. 36/42 cold temps just doesn't feel right. Maybe it's all in my head and I am just wearing tires prematurely?
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Old 09-05-2019, 11:25 PM   #13
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Quote:
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Hey UV! I've seen you ride.... you're telling me that you run 36/42 out there on ACH?
What's up Man! Yes I do but not lately, due to a back issue and some other funk but that's changing (great new chiropractor) and because as soon as I change the oil and stuff I'm going to finish wearing out those old Q3s on ACH and get some new Q3+s.
(although I haven't been riding ACH/9mile, I have been caging it undercover about once a week......it's a different perspective, especially at night. Some interesting stuff goes on up in them there mountains. Plus it's fun to surprise the regular car guys and even some riders that don't suspect my so innocent looking cage scoots faster than fire on a greyhound.)

Last edited by UV1000; 09-05-2019 at 11:53 PM. Reason: disclaimer: no dog butts were burned in the making of this.....
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Old 09-05-2019, 11:41 PM   #14
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Quote:
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I'm going to try to put a bit more air this weekend and see how it feels.
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Old 09-06-2019, 10:33 AM   #15
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Nothing wrong there son. Just aggressive application of throttle
Ride a few laps with smoother throttle application and those things go away pretty fast. But then what fun is that?
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Old 09-06-2019, 08:08 PM   #16
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Quote:
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What's up Man! Yes I do but not lately, due to a back issue and some other funk but that's changing (great new chiropractor) and because as soon as I change the oil and stuff I'm going to finish wearing out those old Q3s on ACH and get some new Q3+s.
(although I haven't been riding ACH/9mile, I have been caging it undercover about once a week......it's a different perspective, especially at night. Some interesting stuff goes on up in them there mountains. Plus it's fun to surprise the regular car guys and even some riders that don't suspect my so innocent looking cage scoots faster than fire on a greyhound.)
Glad to hear you're doing well and getting better . Rode up to Newcomb's with "Bizautomation" a couple weekends ago and he was asking where you've been. Bunch of good riders have been MIA. It'd be nice to see "Guy" around too.
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Old 09-06-2019, 09:04 PM   #17
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Quote:
Originally Posted by dougiefresh67 View Post
Nothing wrong there son. Just aggressive application of throttle
Ride a few laps with smoother throttle application and those things go away pretty fast. But then what fun is that?
Thanks my man! Will do!
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