It is hard to know what tools might be needed in an unexpected situation when you are out and about, whether on or off the bike. Multi-tools can be a useful way to stay prepared without the impracticality of carrying a selection of individual tools around with you.
The Leatherman Surge has the following tools accessible from the folded position:
A plain blade.
A serrated blade.
A T-shank adaptor compatible with either the file or saw provided, or any other blade with a common T-shank end.
When unfolded, additional tools are accessible:
Pliers including replaceable wire cutting/stripping blades and two crimping cut-outs below the pivot.
An awl, large and small flat-head screwdrivers.
A bottle/can opener and a bit-driver which is compatible with proprietary Leatherman bits (available separately) or regular hex bits with the use of an adapter (available separately)
Proprietary Leatherman bits (not necessarily included with every Surge)
In addition to this, my Surge came with a leather pouch which can be worn on the belt. This is useful as the weight of the Surge is a bit too much to be comfortable in trouser pockets.
The build quality is really quite impressive. There is no play in the pliers or any of the other tools, the tools are made from an appropriate grade of steel for their intended purposes and the blades are designed in such a way that their edges do not strike or sit in contact with the housing when folded away.
Sadly, in the UK at least, the Leatherman Surge is not a legal carry item for most people because it features two locking knife blades. Whilst there are exceptions for those with a “good reason” for carrying one, such as profession, the vagueness of that clause could lead you to think that you’re safe whilst actually falling foul of the law. Because of this, and the absence of an adjustable spanner, I would not recommend the Surge as a multi-tool for cycling purposes. However, I would recommend it for anyone who would benefit from having a really good general purpose multi-tool.