1/4" RIM DRIVE SPROCKET. To use a dime sized bar, your chainsaw drive sprocket must accept Ľ" chain. Most chainsaws are sold with a 3/8" (.375) drive sprocket. Our 270020 1/4” rim sprockets adapt the following makes and models to accept 1/4” chain:
STIHL: 017, 018, 019, 021, 023, 025, MS170, MS180, MS210,MS230 & MS250.
Poulan: 25 and 25DA.
Echo: CS302, CS315, CS330, CS351, CS360, plus many others with a 3/4" rim drive. Note: only the rim drive sprocket (also known as a "floating rim") shown in the lower right of the picture is included. The rim drive sprocket fits on the center drive sprocket by replacing the orginal factory supplied rim drive sprocket. Highest professinal quality, Australian made. Limited supply, order several now! Replaces old items 270021 and 270022.
270020 1/4" PITCH RIM DRIVE SPROCKET