5 ms·

(1) Doesn't that severely weaken the frame? It looks flimsy, and even if the lock part is attached back, it does not look like as strong as a welded joint. (2

(1) Doesn't that severely weaken the frame? It looks flimsy, and even if the lock part is attached back, it does not look like as strong as a welded joint. (2) The levers introduced by the long straight tubes seem to open up a physical way in. Imagine twisting the bike off the post. (3) Once LPL shows how to open that lock, one might want to swap it for a better one. Is that possible?

bjornorn 5y ago
The downtube is mostly subjected to stretching forces. But maybe it does lose some stiffness compared to a normal bike.
- pletnes 5y ago
  Using a wire, at least, makes it less stiff in torsion since a regular «metal tube» will have bending and shear stiffness. But then, it’s a tradeoff which could be worth it for some casual bikers!
em-bee 5y ago
(1) was my first thought, especially on that part of the frame. i think if it was the horizontal upper bar, it would be less of a concern, because the upper bar gets different stresses. also, this lock is way to bulky for many locking situations. i can't even think of a bike-rack where this would work. it seems to be suitable for locking to sign-posts only. (and see the comment below on that)
locallost 5y ago
Ritchey sells breakaway frames for easier transport, and their frames are definitely not weak, so I would say no.
- newaccount74 5y ago
  I've never had a breakaway bike, but judging from photos the Ritchey couplings look a lot sturdier than these hinges. It's probably still ridable because the top tube is rigid, and for a bike that's mainly geared at convenience stiffness isn't a priority anyway.
tokai 5y ago
As Bjornorn writes down tube are mostly stretched. Some bikes just use a wire. Incidently that could also make for a better locking system that the stiff one with cuts. https://www.designboom.com/technology/kibisi-biomega-bos-8-speed-bicycle-06-20-2016/ https://www.designboom.com/technology/kibisi-biomega-bos-8-s...
bayindirh 5y ago
> (3) Once LPL shows how to open that lock, one might want to swap it for a better one. Is that possible? Looks like a disc detainer lock. Possibly needs "A pick Bosnian Bill and He made", but as we all know, there are disc detainer locks and disc detainer locks. I'm not sure it's a top of the line, high security cylinder. Hope it's replaceable.
- IshKebab 5y ago
  Nobody actually picks disc detainer locks to steal bikes. Even crap ones. Bolt cutters or angle grinders are faster and easier.

bjornorn 5y ago

The downtube is mostly subjected to stretching forces. But maybe it does lose some stiffness compared to a normal bike.

pletnes 5y ago
Using a wire, at least, makes it less stiff in torsion since a regular «metal tube» will have bending and shear stiffness. But then, it’s a tradeoff which could be worth it for some casual bikers!

em-bee 5y ago

(1) was my first thought, especially on that part of the frame. i think if it was the horizontal upper bar, it would be less of a concern, because the upper bar gets different stresses. also, this lock is way to bulky for many locking situations. i can't even think of a bike-rack where this would work. it seems to be suitable for locking to sign-posts only. (and see the comment below on that)

locallost 5y ago

Ritchey sells breakaway frames for easier transport, and their frames are definitely not weak, so I would say no.

newaccount74 5y ago
I've never had a breakaway bike, but judging from photos the Ritchey couplings look a lot sturdier than these hinges. It's probably still ridable because the top tube is rigid, and for a bike that's mainly geared at convenience stiffness isn't a priority anyway.

tokai 5y ago

As Bjornorn writes down tube are mostly stretched. Some bikes just use a wire. Incidently that could also make for a better locking system that the stiff one with cuts. https://www.designboom.com/technology/kibisi-biomega-bos-8-speed-bicycle-06-20-2016/ https://www.designboom.com/technology/kibisi-biomega-bos-8-s...

bayindirh 5y ago

> (3) Once LPL shows how to open that lock, one might want to swap it for a better one. Is that possible? Looks like a disc detainer lock. Possibly needs "A pick Bosnian Bill and He made", but as we all know, there are disc detainer locks and disc detainer locks. I'm not sure it's a top of the line, high security cylinder. Hope it's replaceable.

IshKebab 5y ago
Nobody actually picks disc detainer locks to steal bikes. Even crap ones. Bolt cutters or angle grinders are faster and easier.