CKRU-FM (100.5 MHz) is a commercial radio station in Peterborough, Ontario, Canada.

The CHEX call letters remain with Channel 12, which had separate ownership at the time.

On October 11, 2007, CKRU applied to the Canadian Radio-television and Telecommunications Commission (CRTC) to convert to the FM band.

[1] On May 8, 2008, CKRU was given approval to convert to the FM band at 96.7 MHz, however, Pineridge Broadcasting, who owns CKSG-FM and CHUC-FM in Cobourg, had selected the 96.7 FM frequency for a new adult contemporary station (CJWV-FM).

On August 29, 2014, CKRU flipped from classic hits/oldies to hot adult contemporary and rebranded to Hits 100.5.