The new way of specifying the mass of the Classic weight does not include the mounting kit, which varies with each installation.  On average, the installation kit more than makes up for the slightly lighter weight specification.

 If you want a throttle lock but vibration is not a concern, this is our lighter size.  If you want conservative styling, this design calls less attention to itself than the Pounders tm.  Some people enjoy the ability to hold their hands a little further out on the bar ends, for leverage (though we strongly recommend against putting more than your little finger over onto the weight, as some fitments are not stout enough to be a good handhold in an emergency). When we recommend it, it is because that's all the mass you need to get the job done.

 As you can see in the tech drawing, the Classic tm weights and throttle locks are 1.999" long.  With straight bars like drag bars or MX bars, this means a nearly 4" increase in width.  However, the more the bar ends are angled toward the rider, the less the width goes up.  For instance, a 30 degree pullback on the grips will grow just less than 3.5" in total width with the addition of weights or a throttle lock.