One of the knurled ends of the tommy bar unscrews, allowing it to thread through the end of the black shaft. When you open the case, you remove the main wrench and then assemble it with the gold tommy bar before you can use it. In terms of its efficiency as a tool, then, the Lezyne is lagging behind alternatives. There's no two ways about it – it would have been a significantly quicker job with something like the Park Tools ATD-1.2, which you can quickly tighten until the click tells you to stop. This is not much of a problem with shoes, but on something like a seatpost clamp it's not really possible, so you have to torque it a little at a time. Contrary to what your muscle memory wants to do, you're best holding the tool still and rotating the shoe, so that you can keep an eye on the gauge on the tool to monitor how much torque you're applying. The first job I set out to do was to swap cleats on two pairs of shoes – 12 screws needing torquing to 6Nm. It does come in a nice zipped case, and the quality CNC'd finish is what we'd expect from Lezyne, but still – £50? I've used a number of click-type torque wrenches and they're pretty nice to operate, so I was initially pre-disposed against the Lezyne – £50 seems an awful lot for a posher version of what Decathlon will sell you for £7. This makes for faster spannering as you don't have to keep a careful eye on a gauge, so shop and pro mechanics have mostly switched to this type. Most modern torque wrenches now use a "click" mechanism, so when you reach the desired torque it gives way a little with a pronounced click. It's how old-school torque wrenches like the Park TW-1 used to work and has little to go wrong and doesn't need recalibration. The Lezyne Torque Drive uses a torsion beam mechanism – there is a carefully dimensioned axle down the middle of the shaft which twists a known amount for each newton-metre of torque you apply, and a visual gauge to show the torque applied. An experienced mechanic will generally have a good idea of what 5Nm feels like, but you'll often see shop mechanics using torque wrenches on customer bikes (particularly really expensive ones!) even if they don't bother on their own bikes. Look on your stem or seatpost clamp – it will likely have perhaps 5Nm or 7Nm printed there. Lightweight bike frames and components can be damaged by over-tightening bolts, and you can also strip the threads or round off the hex hole, especially on smaller bolts or those made of aluminium. Cons: No click so you need to go slow and watch the dial carefully handle needs assembly each time you take it out of the case expensiveĪ torque wrench is basically a socket spanner that can prevent over-tightening of bolts on your bike (or elsewhere). Pros: Very lightweight and pocketable good range of bits nice case usable from 2-10Nm.It uses a torsion bar rather than the click mechanism typically seen in workshop torque wrenches, making it slower to use, but that's less of a concern for occasional use than it would be for a shop mechanic. The Lezyne Torque drive includes all the bits you'd likely need out on the road and comes in a compact and eminently pocketable case. Now you can carry a torque wrench with you, so if you need to make some mid-ride adjustments you need have no fear of over-tightening bolts and damaging some featherweight carbon bits. Lezyne makes lovely shiny tools including a range of multi-tools suitable for carrying with you on a ride.
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