If you get some wall anchor resin and put this in with the bolts it will never move. Yes a little more cash on top but you won't shift this. You can buy it in screw fix.
FFS, paid a tenner (delivered) for a near identical masterlock one the other day. HOT 12x70mm anchor bolts are going to be quite tricky to remove from concrete / masonry if sunk correctly.
as useful as a chocolate teapot, you'll be able to pull it out the ground with the weight of the bike alone
Nice thanks. The hardened steel chain is on sale there too so added that too