Secure Bike Shelter Compound | LockableSecure Bike Shelter Compound Lockable The Secure Bike Shelter Compound Lockable enclosure maximises secure, covered space by using Sheffield toast rack style bike storage. This bike enclosure has been designed to work in any environment. We know as we've installed them everywhere from schools to residential areas. They look smart, are hard wearing and easily store up to 68 bikes. The cycle compound is not only part of our bike enclosures range, but