When comparing Park Tool MT-30 vs Crank Brothers m19, the Slant community recommends Park Tool MT-30 for most people. In the question“What is the best bike multi-tool?” Park Tool MT-30 is ranked 1st while Crank Brothers m19 is ranked 2nd. The most important reason people chose Park Tool MT-30 is:
The Park has the ideal selection of base tools (2.5, 3, 4, 5, 6 and 8mm hex wrenches, T25 & T30 Torx drivers, a combo cross/straight tip screwdriver) as well 8 & 15mm box wrenches, which are essential for removing the rear wheel on single-speed bikes.
Specs
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Pros
Pro Great for fixie and single-speed bikes
The Park has the ideal selection of base tools (2.5, 3, 4, 5, 6 and 8mm hex wrenches, T25 & T30 Torx drivers, a combo cross/straight tip screwdriver) as well 8 & 15mm box wrenches, which are essential for removing the rear wheel on single-speed bikes.
Pro Convenient to carry with you
The Park tool weighs 5.4 ounces, and it has a key ring holder for urban appeal.
Pro Great for both home and roadside repairs
The Crank Brothers m19 multitool has 19 tools- a chain tool ( 8/9/10 speed compatible), spoke wrench ( #0, 1, 2, 3) hex wrenches ( #2, 2.5, 3, 4, 5, 6, 8) open wrench (8mm, 10mm) screwdrivers (phillips #1, phillips #2, flat #2) torx (t-10, t-25). This will cover nearly all your repair needs, even chain troubles. Since it's a lot more compact than a full tool kit, it's far easier to carry with you anywhere you go.
Pro Great for off-road biking because it has a chain tool
This multi tool has an excellent chain tool, that's compatible with the most common chain sizes (8,9 and 10). This might save you a long walk home in case anything happens with your bikes chain.
Pro Comfortable to use even with gloves on
The tool is slightly smaller than an iPhone 5, and it has side grips. Even when using it with gloves on, it'll give you enough leverage and won't slip out of your hand.
Pro Durable
The tools on the m19 ar made of high-tensile steel, which will last for years without chipping, and they won't damage the bolts on your bike. It also has a lifetime warranty, and if you store it away from water, it will last for many years.
Cons
Con Not as comfortable as a stand alone box wrench
A stand alone box wrench gives more leverage for removing the rear wheel, which makes the process easier. However, that doesn't mean the box wrench included in the Park tool is useless- it'll still get the job done, just not as comfortably as a tool dedicated for that purpose
Con Difficult to open/close case
This tool comes with a carrying case, which is a nice addition, but the lid on the steel case is difficult to open and close.