Peyote

I want to make my own anchor point using a large bucket/container, chicken wire and a bag or two of cement + a u-lock or chain to set in the cement. I have a read a few posts of people using these home made anchor points but can not find how they were made and what kind of cement.

I'm guessing that there are different grades and densities of cement so I am wondering what is the best premix to use ? Also, what size ? 25L 50L ?

Rented accommodation so other anchor points that require drilling and digging holes are out of the question.

Velo Dog

Just buy a bag (or however much you need) of ready mix at Home Depot. Mix with water and pour into your bucket. I think one sack weighs 60 pounds, which most guys could carry off, so I'd use two.
For the hardware, I'd center a big eyebolt with a washer and nut on the threaded end in the concrete, then chain to that. Or you could put a couple of feet of chain in the bucket with the ends exposed, pour in the concrete and lock to the chain.
Don't mix it in your bathtub. Don't spill concrete on anything that belongs to your landlord. If the bike is valuable, don't trust this setup, because an organized thief with a friend could pick it up and walk away. Why not just keep the bike in your bedroom?

Peyote

Thank you for the that advice. I think 2 bags is what I will go with. I am going to submerge chicken fence wire to reinforce it so that picking chunks of will be hard and take longer. I know this is not completely theft proof but I am willing to put the hours in to make it as difficult as possible. I have invested in a Abloy lock 362 which is one of the best padlocks available and I will be getting either a 16mm or 19mm link chain that is guaranteed against hand bolt croppers.

My bike was stolen from my yard and they cropped a chain with bolt croppers. I'm sure it was not a professional thief, just someone who had spotted it and planned the theft. It wasn't at all a high-end bike but was custom built and was an average amount of cash. I had not realised but the bigger chain that was secured to and immovable post had been tampered with because they ripped the nylon cover and is looks like they use a hacksaw because there were some hair line scratches - barley scratched at all.They had covered the chain with gravel so I did not notice. It must have been a few weeks or months before the next attack because there was a HUGE spider set up home with a nest in the ripped hole. The chain cropped was a lot smaller than the chain attached to the post and the smaller chain was attached to that and then attached to the bike.

I may just keep the new one it in my bedroom and get is insured.

Looigi

FWIW, an abrasive cutoff wheel on an angle grinder or other high speed rotary tool will make quick work of any chain. I cut through the shank of a 3/8" drill bit with a Dremel tool in well under a minute and cut lock shackles in similar times. The only thing stronger anchor points, better locks, and thicker/harder chain can do is lower the probability somebody will steal your bike, not eliminate it.

Insurance may good if depending on your circumstances. Keep in mind you pay for insurance whether or not your bike is stolen and insurance companies make money by collecting more than they pay out.