
My reds, front and rear, are also adjustable in place by turning the removable adjustment knob at the top of the shock.
The comparison of red and yellows may be irrelevant, since it appears that reds are no longer being offered.
BTW, If you're changing out original Boges, which are now 30 years old, you will love either reds or yellows! Or any new shock for that matter! Well, maybe not kill-your-backs (KYBs) according to some posts.