What would cause cupping on a brand new front tire? - Wrist Twisters
 
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post #1 of 6 Old 05-13-2019, 01:47 PM Thread Starter
Princeps Prior
 
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What would cause cupping on a brand new front tire?

I got the S21 tires about a month ago and just noticed what looks like an odd wear pattern. I'll have to get some chalk and raise the front tire to tell for sure, but it looks like cupping right off the center on the throttle side.

I'm still checking this out, but I'm wondering what would cause this so I can start looking for the problem.

I'm thinking head/wheel bearing, alignment to the rear tire, alignment withing the forks, etc...

I know with car tires you can tell things like toe in/out, camber, etc... by looking at the tires, but I don't know how to do this with a motorcycle tire.

I think if I raise the front and spin the tire, I should be able to tell if there's any cupping and maybe get some pics of it.

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post #2 of 6 Old 05-13-2019, 02:07 PM
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Take a picture

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post #3 of 6 Old 05-13-2019, 05:27 PM
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Incorrect tire pressure?

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post #4 of 6 Old 05-14-2019, 09:21 AM
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If you look through my posts over the last I dunno say 17 years you will see that I have specifically stated many times quite vociferously that Bridgestone front tires are the absolute worst front tires on the market and cup prematurely. Between the crown of the roads and the belting construction of the tire I have never had any success with Skidstone front tires...

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post #5 of 6 Old 05-14-2019, 09:27 AM
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Rebound being too fast or too slow can also cause odd wearing

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post #6 of 6 Old 05-14-2019, 07:18 PM
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I hate Bridgestones. We UPS Feeder (semi tractor trailer) drivers hate Bridgestone truck tires. The Bridgestone steer tires on a big truck wear just as badly as their front tire on a motorcycle.

I've run Michelins for years. But lately, I've been buying Pirellis. I think a new Pirelli is a little better than a new Michelin. But a worn Michelin is better than a worn Pirelli. But until they get almost worn out, I really have gotten to like Pirellis.

My Performance Pack Mustang came with Pirelli tires. They stick like Velcro, also.

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