Ok everyone, here is a partial list of air shock part number, length, and what bike they are off of. I think this will help anyone who is looking to get some "Road King" shocks for there sporty.
I wish I had this info before I got a pair of 13". No biggie I got them cheap but will keep looking for some 12"
Please contribute any info or corrections.

54532-85
54536-02A
54540-93
54565-09 FLH FLHT FLHR FLHTI 13" (G5E3-00)
54565-97 (A) FLH 13"
54565-97 (B)
54565-97 (C)
54631-02B Road king FLHRS or FLHX or FLTRX 12" shock pair "low profile"
54632-98 bagger 12" or 12.5
54635-09 12"
54661-02A Road King FLHR Street Glide 12" single shock "lowered"
54662-09 street glide 11.5"

 

Hey Sportster I got my 12" RK's from ebay just 138 bucks, I love em.

 

Nice effort on the part numbers.

 

Are those all 12"? I see one of them in there labeled as 13". Just wanted to make sure.

 

Yes the -97 A B C are all 13"

 

this should be a sticky
wish i had this when i was ebay hunting for air shocks, had to find the part numbers on my own

 

This mod is on my short list.
Keeping my eyes open.

 

Ok here are some picts of my installation of a single feed for the air shocks.

I went to AutoZone and got a air shock install kit. $8



I tossed the rubber boots and the mushroomed head ends went on my brass fittings.



I had some brass 1/8 hose fittings from the local hardware store. $2



Last I found a hole on the left side of the frame above the battery. It's twin on the right has a bolt for the oil tank. I drilled it out one size bigger 5/32 and stuck the T fitting thru it. I had to move the battery out of my way.

Of course I soap tested it all before putting in the T!

But it neat and tidy!

 

Here are some before and after shots.
First is the 13 FL shocks then the 12 RK shocks.
Height to fender strut went from 27" to just under 26". Now my 1up will have an easier time getting on.










Man my 16" looks small, I so want a 18x5 rim!

 

How does the 12" ride compared to the 13" ??

I can t decide to do 13 or 12 on a 07 custom.

Thanks