@ Louis ,
are those heavy duty shocks from hd and do they have air-pressure or do they work just with oil like the progressive ones , i seasrched on the " wilbers " website but i do not know anything about shocks .
Can you tell me which ones are best and which ones fit my SERG ?
Progressive 440's do not use air.
Earlier in the thread you mention that the '09 SERG has 12" shocks. In case you do not want to change this parameter (my main reason was to get the E-Glide lowered from 13" to 11.5" in the back), Progressive 12" will be best. There are several shocks to select from, I bought mine from OneStopMoto, the site is fabulous,
http://www.onestopmoto.com , they have the
PROGRESSIVE SUSPENSION 440 Series I.A.S. Shocks - FLH/FLT (All) [06-09]
12" Heavy Duty (Black) - P/N 440-4058B
Current price $ 456.95 plus shipping
Note: 1) The 440-4058B/C and the 440-4060B/C part numbers listed above are newly designed in 2009 for all Touring Models 2006-2009. Purchasing the older design (old part numbers) will result in potential tire-fender rubbing and other interference.
2) Heavy Duty Shocks are recommended for bikes that are operated at or near the manufacturer’s maximum load rating over 50% of the time.
The ride improvement on my Ultra was significant, and despite being lower the comfort was almost as stock.
Ride safely,
Louis