Tire Cupping?
Grand HDF Member
Joined: Dec 2008
Posts: 3,721
Likes: 372
From: Tonopah Az
I spent a life time as a brake and front end mech. and have seen every tire wear pattern there is and as a rule cupping comes from low air pressure, that being said the HD stock tires are **** to cupping and the only way to prevent it is to run them a little over inflated(3-5 lbs). I changed mine out to American Elite and love them, last year had a rear blow out near a dealer and have extended warranty with road hazard they put back on a HD tire and a few months ago the cupping started so I ran the air pressure up a few pounds and it has helped but the problem with this is once a wear pattern starts you almost always can't stop it.
Road Warrior
Joined: Mar 2010
Posts: 1,967
Likes: 18
From: Florida
I have tired the running with hight psi and it didn't do a thing to prevent cupping (new tires). Dunlop had me doing field test on them with weekly reports. Can't say any more on the that subject.
Now, it could have to do with the type of road we have in Florida but the others I have heard from around the USA....They just cup!
Now, it could have to do with the type of road we have in Florida but the others I have heard from around the USA....They just cup!
Elite HDF Member
Joined: Nov 2010
Posts: 3,846
Likes: 173
From: Simi Valley, CA
If 40-42 psi is under-inflated for a 190 lb. solo rider then you might be right.
Road Captain
Joined: Sep 2011
Posts: 699
Likes: 13
From: Northeast
I have tired the running with hight psi and it didn't do a thing to prevent cupping (new tires). Dunlop had me doing field test on them with weekly reports. Can't say any more on the that subject.
Now, it could have to do with the type of road we have in Florida but the others I have heard from around the USA....They just cup!
Now, it could have to do with the type of road we have in Florida but the others I have heard from around the USA....They just cup!
Big Kahuna HDF Member
Joined: Nov 2008
Posts: 35,506
Likes: 27
From: Calgary eh
From what I've read on the subject it could be caused by low tire pressure. But it can also be caused by normal wear depending on how you ride. If you spend a lot of time in corners, and are riding hard you'll put wear on the sides of the tires where they meet the ground. The cupping is normal wear.
Different tires wear differently depending on the riding style.
I'm still trying to figure it out, you'd think someone like an engineer would have it all figured out and could post the final answer.
Different tires wear differently depending on the riding style.
I'm still trying to figure it out, you'd think someone like an engineer would have it all figured out and could post the final answer.
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