Detailed explanation of grip compounds Please note that you have to choose the compound qualities which you feel are the most desirable for you. However, you cannot have all the best qualities in one compound. For instance the soft compound has the best tackiness and absorption but has low strength, is difficult to install and is easily damaged in an accident. Conversely the firm is very strong and is difficult to damage but is low on shock absorption. As a control the firm grip is similar to a stock grip with both medium and soft feeling softer than stock.
Please also note that Renthal Grip Glue is essential when fitting soft grips. This is because the soft compound is so elastic and soft that without glue it impossible to stop the grip from turning on the handlebar. The soft grip is a 'throw away' professional item. It will give you a blister free and very comfortable ride but at a price. Unfortunately that price is longevity. The choice is yours.
However Carmichael and Pichon both used Renthal Diamond/waffle soft grips to win their respective championships in 2001.
Again, please remember that firm grip is not hard but is similar to stock feel