Measuring just 21x12cm, the Abus Granit Futura Mini is small enough to fit in the pocket of your jeans and strong enough to beat most thieves. It's light, too, and under 700g, and not too pricey either.
The Futura Mini is dinky, but don't think it'll roll over under attack. Ours was barely marked by the big bolt cutters and the persuader - even with the help of a 2 ton bottle jack - wasn't able to remove it from its post. It survived five minutes of attack intact, although it's worth mentioning that once we'd finished bashing it about it wasn't actually possible to open the lock; the key snapped in the (presumably bent) mechanism.
The Futura Mini doesn't come with a mount, but that's sort of the point: you can fit it in your pocket for a pub run, or just lob it in your bag. It's light enough that you don't feel like you're dragging a sack of spuds everywhere. I've been using one on and off for a year now, and found it really handy. You'll struggle to lock frame and wheel with it (it is possible, just), or more than one bike, but for general security duties on a day-to-day basis it's excellent.
Easy to stow, light and secure: a great lock to keep in your bag.
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Make and model: Abus Granit Futura Mini U-lock
Size tested: n/a
Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?
Recommended for two-wheelers with a high risk of theft
Lock available with extra wide shackle or alternatively as an extra slim version with extra weight advantages
Attach two-wheeler to a fixed object (e.g. lamppost, road sign, fence)
Special hardened shackle and ultra light material offer high protection against attacks
Drill-protected ABUS -Plus locking system
Stayed put but wouldn't open after attack
Tell us what you particularly liked about the product
The size and weight
Tell us what you particularly disliked about the product
Can limit your locking options
Did you enjoy using the product? Yes
Would you consider buying the product? Yes
Would you recommend the product to a friend? Yes
Age: 38 Height: 190cm Weight: 98kg
I usually ride: whatever I'm testing... My best bike is: Genesis Equilibrium with SRAM Apex
I've been riding for: 10-20 years I ride: Every day I would class myself as: Experienced
I regularly do the following types of riding: time trialling, cyclo cross, commuting, sportives, general fitness riding, fixed/singlespeed, mtb, Mountain Bike Bog Snorkelling, track
Dave is a founding father of road.cc, having previously worked on Cycling Plus and What Mountain Bike magazines back in the day. He also writes about e-bikes for our sister publication ebiketips. He's won three mountain bike bog snorkelling World Championships, and races at the back of the third cats.