2817 Series mono-tube double adjustable strut dampers

The modular 2817 family spans 5 different stroke/length combinations. In addition, there is the possibility of adding a droop limiter to limit Lmax. All available damper lengths can be found in table 1.
For a damper to function properly, it must be of correct size and valving. Regardless of the actual installation, the basic procedures for picking a damper with the right dimensions are always the same. For information on damper valvings see the valving page.

The generic part number is as follows:
*Tip: always choose the longest Lmin you can accommodate. This ensures the lowest fiction plus the best durability

*Note that the internal droop limiter can easily be changed in a KONI workshop. This allows fine (re) tuning of Lmax. after purchase of the unit.

Code	Lmax Dynamic* [mm]	L max Static** [mm]	Lmin [mm]	Stroke (max static) [mm]	L cylinder [mm]
43 xxx 00	429	429	310	119	278
47 xxx 00	469	469	330	139	298
51 xxx 00	509	509	350	159	318
55 xxx 25	524	549	370	179	338
59 xxx 25	564	589	390	199	358

Table 1: 2817 damper lengths.’

* This is the max. length allowed under dynamic conditions (see Disclaimer)
** The damper should only reach this length under static (no load) conditions

A droop limiter can be fitted to limit Lmax. The limiter length can be increased in steps of 5 mm and can be changed in a KONI workshop. Please state the required length at the time of ordering.

Caution:
At full droop, the beam strength of a McPherson tube and insert assembly is at its minimum. To warrant sufficient strength and safe operation, a spacer (droop limiter) is usually fitted inside the damper. Unfortunately, the resulting dimensions of the damper do not always allow for the combination of a very low ride height and sufficient clearance to remove the wheels when the car is on jacks. As a practical necessity, the droop limiter is therefore shortened or omitted altogether. As a result, the damper can then potentially be used outside its safe operating limits. Under no circumstances should a dynamic load be allowed to act on the strut/insert assembly when the dampers are at such extended droop. The shortening, removing or not fitting of a droop limiter should solely be undertaken for the purpose of making wheel changes possible. KONI will not accept liability for any damages resulting from not adhering to this practice.


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