Groschopp offers torque arms on right position gearboxes to provide a pivoted connection origin between your gearbox and a fixed, stable anchor point. The torque arm is used to resist torque developed by the gearbox. Quite simply, it prevents counter rotation of a shaft mounted swiftness reducer (SMSR) during operation of the application.
Unlike various other torque arms that can be troublesome for a few angles, the Arc universal torque arm permits you to always position the axle lever at 90 degrees, providing you the most amount of mechanical advantage. The spline style lets you rotate the torque arm lever to nearly every point. This is also helpful if your fork condition is just a little trickier than normal! Works ideal for front and backside hub motors. Protect your dropouts – receive the Arc arm! Created from precision laser slice 6mm stainless steel 316 for exceptional mechanical hardness. Includes washers to hold the spline section, hose clamps and fasteners.
A torque arm is an extra piece of support metal added to a bicycle frame to more securely contain the axle of a powerful hubmotor. But let’s back up and get some more perspective on torque arms generally to learn if they are necessary and why they happen to be so important.
Many people choose to convert a standard pedal bicycle into a power bicycle to save money over investing in a retail . This can be an excellent option for a number of reasons and is amazingly easy to do. Many manufacturers have designed simple change kits that can easily bolt onto a standard bicycle to convert it into an electric bicycle. The only difficulty is that the indegent man that designed your bike planned for this to be used with lightweight bike tires, not giant electric hub motors. But don’t 
fret, that’s where torque arms come in!
Torque arms are there to help your bicycle’s dropouts (the part of the bike that holds onto the axles of the wheels) resist the torque of a power hubmotor. You see, regular bicycle wheels don’t apply very much torque to the bicycle dropouts. Front wheels truly don’t apply any torque, therefore the entrance fork of a bike is designed to simply hold the wheel in place, not really resist its torque although it powers the bike with the drive of multiple professional cyclists.
Rear wheels on normal bicycles traditionally do apply a small amount of torque upon the dropouts, but not more than the standard axle bolts clamped against the dropouts are designed for.
When you swap within an electric hub motor though, that’s when torque becomes a concern. Small motors of 250 watts or fewer are often fine. Even entrance forks can handle the low torque of these hubmotors. Once you start getting up to about 500 watts is when problems can occur, especially if we’re talking about front forks and much more so when the materials is weaker, as in light weight aluminum forks.
