From Newsgroup: uk.d-i-y

John Rumm <see.my.signature@nowhere.null> wrote in news:10bdkj2$2tc4n$1@dont-email.me:

On 28/09/2025 17:09, David wrote:

My security chain set up for locking my bicycle on car/motor home
racks came with a ground anchor.

Around the outside of the house is block paved, bedded on sand and
separated by sand, so anchoring anything to that would be pointless.

I am wondering how effective it would be to bolt it into a red brick
wall. Not the same as bolted into solid concrete but perhaps better
than nothing.

You can get a decent fixing in brick. If the bricks are soft, then
using a resin anchor[1] will give a good fixing. However keep in mind
that any metal fixing will not last long against a cordless angle
grinder.

[1] I normally use M12 threaded bar, into a 14mm hole. Then 2 to 3
pumps from a mastic gun with something like Fischer VL300 Resin. If it
is a solid brick wall (i.e. no cavity) then you can go deeper into
both leaves (and 4 to 5 pumps of resin).

E.g. mounting uprights for handrails:

https://wiki.diyfaq.org.uk/index.php?title=Ornate_wrought_iron_handrail s#Fixing_the_uprights

Seconded on all counts plus:

1. Go deep: If your security anchor is worthy, drill through to the
internal bricks in a cavity wall, resin secured all the way through.

2. Use shear nuts to secure the plate to the studs.

Additionally:

3. I would never leave a decent bike or motorbike in a visible location,
even at the rear of a property, it will just go.

4. For a bike I would build or buy a shelter in which it would be
secured. Outer loudly alarmed if it was a dodgy area. I am in favour of 'shelled'/'onion' security, light on the outside but alarmed with heavy
inside to delay removal under painfully noisy ear action.

Being aware that:

5. Locking a bike does not stop the theft of ancillaries. I advised a
mate to securely lock his nice MTB in his locked shed. He later found his
bare frame still securely locked in place and later he observed a chav
down the street going around on a recently upgraded ride bearing highly similar but untraceable new components.

Additionally:

6. In a similar situation I have cast a chain into a concrete block of
about 600 x 600 x 800 and placed it in a shed to secure a decent bike.

7. My bikes are pretty well secured even when inside my home.
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