they will just saw through them both with an angle grinder and it will take 5 minutes.
I've actually seen no reports of u-locks being broken with angle grinders (though I'm sure it happens). I was hoping to add a layer of gunk that could potentially get stuck on the blade.
I'm planning on going to the university and seeing what I can do. I tried checking online about rooms where I could put the bike in, but nothing came up.
You could also make friends with a janitor, ask if there are any unused room you could leave you bike in.
Still lock it, though.
Solid advice, hadn't thought of that. I'll make sure to see if the janitors/professors have any rooms that I could use.
Thanks again everyone. I really don't want to get a dirt cheap bike, but I also don't want it to be stolen! I've been thinking about getting a chain lock along with the kryptonite forgetaboutit lock. Even if they have an angle grinder, the chain lock would be harder to use that on since the links will be moving. This would make the angle grinder a pain to use since they wouldn't be able to get that leverage in without actually holding the chain with one hand and the angle grinder in the other, which they will hopefully be reluctant to do. This combination of locks would require an angle grinder AND one of those bulky cutters to go through. Moreover, I plan to add layers and such that would make attacks harder to carry out. The longer it takes them, the more likely they are to leave it alone.
EDIT: I found online several products that are made as GPS trackers for the bike. Moreover, they can alert your phone if it's being messed with. That would be something I could give the police so that they could follow the stolen bike. I don't know what they'd do, it would be something worth asking about when I get the chance.
I also found an article that had research done about ways to slow down these attacks:
Loose fibres: o Both high performance and low performance fibres were seen to effectively jam the drill bit, with some disruption of the functioning of the angle grinder. o The amount of fibres present, length and how the fibres were fixed (to reduce likelihood of loss of coverage) were seen to be key factors in the success of this group of materials. o Coiled fibres were also seen to rapidly jam the drill bit (however, no cut resistance was seen).
Woven fabrics: o As with the loose fibres, a range of woven fabrics were seen to effectively jam the drill bit, especially when loosely fixed.
Ceramics: o Highly effective at preventing cutting and cause significant wear to drill bits, angle grinder discs2 and reciprocating saw blades. o The effectiveness of this group of materials will be highly dependent on one or more of the following: the grade, fixing method and form; however, low grade ceramics have been seen to perform well.
^These were the results. I can attach such things in ways where they can't be removed from the chain and U-lock ( I'm pretty good with my hands
). With a combination of all these, the fabrics might get tangled in the angle grinders and the blade dulled by the ceramics. Moreover, the forgetaboutit lock is already cutter proof, can only be compromised through picking or angle grinder, so I could make it very hard to penetrate. All these things would make the locks very heavy, but I don't mind carrying extra weight on me, better exercise and I'm use to it.
Link to the site with tests:
https://www.cpni.gov.uk/system/file...s_Spreadsheet_Manufacturers_V1.0.20160523.pdf
^They used 36v tools.