Concept Bikes & Bike Innovation - for better or worse

I'm sure they could be broken off but they'd be good for stopping opportunists, quite fancy one for my front wheel which rarely gets locked.

I'm no metallurgist but I reckon you could find a way that breaking it off makes the wheel unrideable... in any case, as you say it's better than nothing.

I guess if we all had proper wheel security the pro thieves would just start bolt cropping carbon forks and so on, or undoing the entire front end. There's no real way to stop someone determined and I always worry that "less visible" approaches like this encourage scallywags to have a go then kick your bike in for the lolz if they fail.