Groschopp offers torque arms on right position gearboxes to supply a pivoted connection origin between the gearbox and a set, stable anchor stage. The torque arm is used to resist torque developed by the gearbox. Put simply, it prevents counter rotation of a shaft attached velocity reducer (SMSR) during operation of the application.
Unlike 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 many amount of mechanical advantage. The spline style lets you rotate the torque arm lever to nearly every point. This is also convenient if your fork condition is just a little trickier than normal! Functions ideal for front and back hub motors. Protect your dropouts – get the Arc arm! Created from precision laser cut 6mm stainless steel 316 for remarkable mechanical hardness. Includes washers to carry the spline section, 
hose clamps and fasteners.
A torque arm can be an extra little bit of support metal put into a bicycle body to more securely hold the axle of a robust hubmotor. But let’s rear up and get some more perspective on torque arms in general to learn when they are necessary and just why they are so important.
Many people choose to convert a typical pedal bicycle into an electric bicycle to save money over investing in a retail . This is usually an excellent option for a number of reasons and is remarkably simple to do. Many producers have designed simple alteration kits that can simply bolt onto a typical bike to convert it into an electric bicycle. The only trouble is that the poor dude that designed your bike planned for it to be used with lightweight bike tires, not giant electric hub motors. But don’t stress, that’s where torque arms come in!
Torque arms are there to help your bicycle’s dropouts (the area of the bike that holds onto the axles of the wheels) resist the torque of a power hubmotor. You see, usual bicycle wheels don’t apply much torque to the bicycle dropouts. Front wheels actually don’t apply any torque, therefore the the front fork of a bike was created to simply contain the wheel in place, not really resist its torque while it powers the bike with the power of multiple professional cyclists.
Rear wheels on standard bicycles traditionally do apply a small amount of torque in the dropouts, however, not more than the typical axle bolts clamped against the dropouts are designed for.
When you swap in an electric hub electric motor though, that’s when torque becomes an issue. Small motors of 250 watts or much less are usually fine. Even entrance forks can handle the low torque of the hubmotors. Once you start getting up to about 500 watts is when complications can occur, especially if we’re discussing front forks and even more so when the material is definitely weaker, as in lightweight aluminum forks.