H&R B2475726 Trak+ Wheel Spacers are a pair of DR type spacers, each 12mm thick. They feature a 5x120 bolt pattern and a 72.5mm center bore. These spacers are sold without bolts. Additionally, H&R offers spacer sets for specific BMW models, such as the 1-Series (Type: 1K4/F20), with options for lower offsets. These specific sets may have notes regarding fitment, such as compatibility with certain stud sizes (e.g., 120/5) and thread types (e.g., M12 x 1.5). The track widening per axle is specified as DR 24mm.