The outer diameter of this extension is 1-7/8" (4

GMA caliper 4-piston type "F" (2 pair needed)

(ABS or non-ABS)

Tour Glide

Includes mounting brackets and hardware

PS, 412 series shock set. 14.25". STD/Heavy Duty. Chrome 1980-08 kontakter och blinker The outer diameter of this412 series shocks: Best value Progressive Suspension shock, great as stock replacement. Nitrogen charged double steel wall body. Multi staged velocity sensitive valving. Five position cam style preload adjustment. Note: Black 412 shocks may be supplied without lower cover. What are Progressive Suspension's 'Heavy Duty' shocks? If you are a lightweight rider with a lightweight passenger, STD Duty is probably your best choice, heavy duty shocks will