Double Butted Spokes:
Can be easily identified by a change in spoke diameter near the head of the spoke and near the threaded portion of the spoke. Double butted spokes are lighter than straight gauge and offer better ride qualities due to a more flexible center section
. These are generally very strong, however spokes with 1.5mm center sections are not recommended for mountain applications.
Straight Gauge Spokes:
These are the simplest spokes for in any type of general purpose or heavy-duty application. They have a constant diameter throughout their length, which makes them slightly heavier than double butted spokes. Straight gauge spokes offer a stiffer ride than single or double butted spokes because of their thicker cross section