Leaving your bike outside is a last resort as it invites rust and theft. Fit a wall or floor anchor, so you can secure your bike with big chain or D-lock. An eye-bolt type expander bolt will work okay, so long as the eye is big enough to fit your lock; take that to the hardware store with you.
Dedicated floor or wall anchors are more secure, since they use multiple, tamper-free fixings, and they’re bigger, so it’s easier to fit a D-lock or chain through them. To prevent thieves stealing bits of your locked bike, such as your wheels or seat post, equip your bike with lockable skewers.
Protect your outdoor bike from the rain with a PVC or nylon bike cover.
For more cycle security advice you can visit the below source.
Article: www.cyclescheme.co.uk