![]() The Unused Tread Depth (UTD) of the damaged tyre (run ~9K km) is ~3.5 to 4 mm averaged across multiple center-of-tread readings. Was doing good speeds, and the spike destroyed my rear LHS tyre and deflated it within 500 metres. Okay folks, last week my 330i Sport with 225/50/17 Bridgestone Turanza T005 RFTs ran over a massive metal spike barely 1.5 km from my house. Search the web to find lots of discussion like this below: If there is too much tread wear delta, it can wear out your Xdrive hardware prematurely, as the system will not be able to detect if there's continuous slip, or mismatched tyre sizes. In fact I'm surprised BMW is not recommending changing at least both the tyres on the axle with the damaged tyre. Xdrive requires all 4 tyres to be matched up within 2-3mm of tread depth, so replacing just one tyre with a different make would be a big No. Is it advisable to mix one Pirelli with three Bridgestones considering car has done only about 6200 kms and other tires have life for over 20,000 kms more? The damaged tire is usable (no air loss after repairing puncture) therefore, I can wait for few more weeks for possibly same brand replacement to arrive. ![]() ![]() Now, the dealer has managed to procure one Pirelli Cinturato 245x50R19 (stock size) and suggesting I go for it. ![]() Thanks to the ongoing tire import issues, replacement wasn't available. One of the Bridgestone Alenzas on my X3 was approved for replacement under BMW Secure warranty in December. ![]()
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