The innovative spring loaded arm holds bike by the tyre and the three point contact secures the wheel in place wheel slot accommodates all types of bikes from 20mm road tyres up to 24 wide mtb tyres in size 20 to 29 wheels hands free use simply roll the bike into the wheel slot and the swing arm holds it steady includes clips to allow connecting two or more rakk stands together to create versatile storage or retail floor display also great for the home and garage arm locks down for eas