Marzocchi Bomber Z1 Coil Spring Kit Spring Weight:Extra Firm B1 posts have a black

B1 posts have a black return speed adjuster on the remote and "ROCKSHOX" laser etched logos on stanchion by the saddle cradle

If the barrel is normally at the remote

Includes the SRAM XX1 Eagle AXS rear derailleur with battery

Six slots to remove water

Marzocchi Bomber Z1 Coil Spring Kit Spring Weight:Extra Firm B1 posts have a blackCoil spring assembly for the Marzocchi Bomber Z1 Coil fork. Use this spring to change the spring rate of your Marzocchi Bomber Z1 Coil fork to be more stiff or more soft. Or, used it in conjunction with the Z1 Coil Conversion Kit to convert your Bomber Z1 air fork to coil. Bomber Z1 Coil Recommended Spring Rate Rider Weight in lbs Recommended Spring 120 150 Purple Soft 150 180 Blue Medium 180 210 Green Firm 210 250 Yellow X Firm