I recently bought a Trek 7.4 FX fitness bike and had a quick question on the u-lock size I should get?

I do not live in a high crime area, and am looking to lock my bike when I commute or run errands, but was wondering if I should buy a mini u-lock or standard size u-lock? I did hear that a smaller u-lock is better, but does restrict where you can lock up the bike.

Does anyone have any suggestions?

The smaller U-Lock is slightly lighter and easier to mount on the frame but it does limit your "anchoring points". I use a small U-Lock/cable combo. Any type of deterrent helps.

The mini size makes it harder for a potential thief to insert a jack and pry the lock apart. But if you're in a relatively low-theft area and plan to lock up the bike in a variety of places I'd opt for the full size type instead so you don't have to search for just the right size object to get the lock around.

U Lock that reaches thru the rear stays and onto the thing you lock the bike to.. Plus a hardened security chain

you have to secure your bike To something and be able to keep both wheels . at least..

instead of a U lock I got an Abus Bordo Granit . it is a folding link lock so much easier to carry than a U Lock ..

ABUS Folding Lock 6500/85 black (55160)
it is their most secure heavy model, they make others that are lighter ..

This. I have a u-lock which is about half an inch narrower than most other u-locks and this makes locking up my bike significantly tricker even though I have a bike with very narrow rims and a narrow aero downtube. The u-lock only looks marginally thinner than most others but this makes a giant difference; I used to have a wider lock and that was much easier to use. Think carefully about what things you might be locking your bike to.