Aluminum I-arm used for the YD-2 series front upper arm. By moving the spacer, the caster angle can be adjusted within the range of 7 mm in the front and back, and it is possible to increase the adjustment range and set the caster angle smaller than the standard. Despite being made of highly rigid aluminum, the I-arm shape makes it as light as possible.
When changing from standard resin to this product, use the D-155 series rod end adapter for the upper I arm together.