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<blockquote data-quote="dobias" data-source="post: 126299" data-attributes="member: 475"><p>Gentlemen;</p><p></p><p>True to his word, Johnny at Michelin's customer help line called back with the following information:</p><p></p><p>The bottom line is there is no listed differences from the standard PRs to the ones listed as B or K. He surmised there may be OEM requested differences that are so slight as to not change Michelin's standards.</p><p></p><p>The tread depths are the same, however we found there are differences in their weights.</p><p></p><p>the 120/70ZR17 standard weighs 9.96 lbs.</p><p></p><p>the 120/70ZR17 B rated weighs 9.85 lbs.</p><p></p><p>the 180/55ZR17 standard weighs 13.14 lbs.</p><p></p><p>the 180/55ZR17 B rated weighs 13.05 lbs.</p><p></p><p>the 180/55ZR17 K rated weighs 15.19 lbs.</p><p></p><p>I find it interesting that the K models are heavier & the B models are lighter than the standards.</p><p></p><p>My order has been placed for the B front & the K rear.</p><p></p><p>dobias :glare:</p></blockquote><p></p>
[QUOTE="dobias, post: 126299, member: 475"] Gentlemen; True to his word, Johnny at Michelin's customer help line called back with the following information: The bottom line is there is no listed differences from the standard PRs to the ones listed as B or K. He surmised there may be OEM requested differences that are so slight as to not change Michelin's standards. The tread depths are the same, however we found there are differences in their weights. the 120/70ZR17 standard weighs 9.96 lbs. the 120/70ZR17 B rated weighs 9.85 lbs. the 180/55ZR17 standard weighs 13.14 lbs. the 180/55ZR17 B rated weighs 13.05 lbs. the 180/55ZR17 K rated weighs 15.19 lbs. I find it interesting that the K models are heavier & the B models are lighter than the standards. My order has been placed for the B front & the K rear. dobias :glare: [/QUOTE]
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