Review from
MBR
If the guts of the M545s lok familiar, it's because they are basically the discontinued M515 bodies with alloy cages. Unclipping is noticeably less fluid than the latest Shimano SPD designs, especially if you want to run high release tension.
In conclusion...
If you're on a tight budgete the Shimano M545s are a reliable option but don't be tempted by the cheaper Shimano M424s, as the basic resin cage isn't strong enough for serious abuse.
Rating: 8/10