216cityboy Posted July 25, 2011 Report Share Posted July 25, 2011 Only have about 4k on a new set I bought from IP. Anyone else have the front tire cup leaving them with an annoying vibration at highway speeds? Most people will say tire pressure issues but that's not the case. I'm always aware of my tires having correct pressure. Just wondering if it will get worse or any other known reasons so I don't have the same issue when I replace them next spring. I plan on trying out the Continentals next. Quote Link to comment Share on other sites More sharing options...
flounder Posted July 25, 2011 Report Share Posted July 25, 2011 Pics? Quote Link to comment Share on other sites More sharing options...
blue03636 Posted July 25, 2011 Report Share Posted July 25, 2011 suspension issue. I have had mine do that on my street bike and the suspension was way too stiff causing the tire to try and make up for the lack of suspension. Quote Link to comment Share on other sites More sharing options...
216cityboy Posted July 25, 2011 Author Report Share Posted July 25, 2011 (edited) Barely noticeable by camera but I'll post some tomorrow. More noticeable by touch. I thought I lost a weight during a road trip but caught the view while sitting next to it.I was wondering about suspension & now that I think about it the Dunlop I took off the front when I bought the bike was mildly the same way. Where can I have the suspension setup for my stature? Edited July 25, 2011 by 216cityboy Quote Link to comment Share on other sites More sharing options...
max power Posted July 25, 2011 Report Share Posted July 25, 2011 4k on a set of Powers? You've done good. Mount your new tires, the powers are probably roached. Quote Link to comment Share on other sites More sharing options...
ponyjr Posted July 25, 2011 Report Share Posted July 25, 2011 When you get to the end of the life on a set of tires it's not uncommon to have some slight cupping issues. Like others have said, i'd check out the suspension settings. Quote Link to comment Share on other sites More sharing options...
2talltim Posted July 25, 2011 Report Share Posted July 25, 2011 if its cupping right at the one tread line..i had the same thing...mine only made it to 3000 Quote Link to comment Share on other sites More sharing options...
Hoblick Posted July 25, 2011 Report Share Posted July 25, 2011 4k out of powers is real good Quote Link to comment Share on other sites More sharing options...
redkow97 Posted July 25, 2011 Report Share Posted July 25, 2011 I'd also ask what you consider "proper" pressures.i don't mean to be insulting, but I've heard people say, "i run mine at 28" and "I run mine at 44," and both think they're correct.but like others have said, it sounds like you've gotten your money's worth out of that tire. Quote Link to comment Share on other sites More sharing options...
shadyone Posted July 25, 2011 Report Share Posted July 25, 2011 I get about 5000 miles out of my pilot powers... Quote Link to comment Share on other sites More sharing options...
Uncle Punk Posted July 25, 2011 Report Share Posted July 25, 2011 When you get to the end of the life on a set of tires it's not uncommon to have some slight cupping issues. Like others have said, i'd check out the suspension settings.I'd also ask what you consider "proper" pressures.i don't mean to be insulting, but I've heard people say, "i run mine at 28" and "I run mine at 44," and both think they're correct.but like others have said, it sounds like you've gotten your money's worth out of that tire.Your answer lies in these two quotes. I don't suspect suspension settings though. End of life and tire pressure are most likely. Quote Link to comment Share on other sites More sharing options...
216cityboy Posted July 25, 2011 Author Report Share Posted July 25, 2011 No point in attaching pics because it wouldn't show the wear but the front tire measures 3mm (book says min 1mm). I run them at the cold spec of 36 front, 42 rear. Glad to hear any info so I don't kill the next set. I just didn't expect them to wear uneven when I've heard mileage ratings from others as high as 8k & they appeared to be worn smooth. The rear is worn more in the center from slabbing it to work everyday but its not cupped. No biggie there. Quote Link to comment Share on other sites More sharing options...
gixxie750 Posted July 25, 2011 Report Share Posted July 25, 2011 way to high PSI IMO Quote Link to comment Share on other sites More sharing options...
SWing'R Posted July 25, 2011 Report Share Posted July 25, 2011 ...I run them at the cold spec of 36 front, 42 rear. way to high PSI IMOKinda what I was thinking, especially on that rear. I think I'm usually at 32F /34R cold. Quote Link to comment Share on other sites More sharing options...
blue03636 Posted July 25, 2011 Report Share Posted July 25, 2011 I run mine 32 front and rear but I do zero highway with it. Quote Link to comment Share on other sites More sharing options...
2talltim Posted July 25, 2011 Report Share Posted July 25, 2011 i run 40 rear...36 front...but im fat...lol Quote Link to comment Share on other sites More sharing options...
RFM Posted July 25, 2011 Report Share Posted July 25, 2011 Have you properly rotated your tyres at regular intervals? Quote Link to comment Share on other sites More sharing options...
jbot Posted July 26, 2011 Report Share Posted July 26, 2011 if the middle of the rear isn't quite at the tread wear bar just yet, i'll trade you for a rear tire that has LOTS of meat in the middle (the far right edge will be close to the wear bar).come on, it's a good deal guy. Quote Link to comment Share on other sites More sharing options...
216cityboy Posted July 26, 2011 Author Report Share Posted July 26, 2011 (edited) Lol. If only rotating them was an option RFM & no thanks jbot. Here's the pics anyway to show the tread life after 4k miles. I'll definitely look into 1: dialing in my suspension & 2: lower psi once I buy the next set. Edited July 26, 2011 by 216cityboy Pics didn't show up Quote Link to comment Share on other sites More sharing options...
rubbersidedown Posted July 26, 2011 Report Share Posted July 26, 2011 I had a couple of front tires cup on me near the end of their life, its not uncommon. IMO you front pressure is a hair low. I was running 35 on these tires.As here, I found there are a lot of opinions as to what pressure to run so I consulted a bike shop. The tire guy told me for highway riding and storage the pressures should be close to 40. (Of course if your getting into twisties or a track day you will what to lower the pressures.) So now I run 40, 40 and did not cup my last front or my current front which will need replaced before summer ends. Quote Link to comment Share on other sites More sharing options...
shadyone Posted July 26, 2011 Report Share Posted July 26, 2011 for track days they always told me 30 30.. but for street i ride 36 f 38 R. thats what my frame says...Edit 33 33 was the hot pressure they wanted... apparently it goes up 10% when hot.. Quote Link to comment Share on other sites More sharing options...
216cityboy Posted July 27, 2011 Author Report Share Posted July 27, 2011 Yeah I commute 200 miles minimum a week back & forth to work & that's ALL freeway. I've only hit the twisties twice so I keep them at the owners manual spec. Thanks for all the info/opinions everyone. I'll just ride this set out til the winter then replace them. Quote Link to comment Share on other sites More sharing options...
blue03636 Posted July 27, 2011 Report Share Posted July 27, 2011 a tire shouldn't just cup running the factory pressure on the highway.http://www.onthethrottle.com/howto/dave-moss-unsprung-tire-wear/ Quote Link to comment Share on other sites More sharing options...
Moto-Brian Posted July 27, 2011 Report Share Posted July 27, 2011 Cupping is usually PSI issue. Cupping is not a trend of suspension issues. Tearing and wear on the surface is what suspension will cause. Of course, it can lead to cupping, but typically, poor suspension is going to cause some serious indication via wear. Cupping is pressure... Quote Link to comment Share on other sites More sharing options...
blue03636 Posted July 27, 2011 Report Share Posted July 27, 2011 Is it really cupping or is it one of the edges of the the rain sipes being taller than the other. Quote Link to comment Share on other sites More sharing options...
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