GREENVILLE, S.C. >> Michelin is recalling more than 77,000 bus tires because sidewall defects can cause them to lose air rapidly, increasing the risk of a crash.

The Michelin XZU2, XZU3, and XM505 tires involved in the recall were produced from 2005 to fall 2011 at Michelin’s plant in Spartanburg, S.C.

Michelin North America Inc. says its lease fleet customers complained that some of the tires had lost air rapidly during use as retreads over the past two years, prompting a company investigation. It did not cite any instances of crashes.

The National Highway Traffic Safety Administration announced the voluntary recall on its website. Michelin, based in Greenville, S.C., is expected to begin the recall April 30.

Customers with questions can call the traffic safety agency at (888) 327-4236 or go to http://www.safercar.gov .