Originally Posted by ZAHANMA

Eurocharged purchased all the rights to any hardware developed by LET including the pulley that were a full custom design as well as the Heat Exchanger.

After they purchased this, Eurocharged made a decision that three different sized aftermarket pulleys competing in the same market segment was not warranted and scaled it back to just the 178mm and 185mm crank pullies. They did this with the thought that there are two different audiences they are drawing from, those who want just some more power and those who want as much power as possible... This is the reasoning behind the 181mm no longer be offered in the Eurocharged product line.

Even though it is no longer offered in the product line Eurocharged still provides 100% technical support for 181mm pullies that have been purchased.