Cantilever / pushrod (inboard shock)

The shock is mounted inboard (on the chassis), driven by a pushrod and a rocker (bellcrank). The wheel pushes the pushrod, the pushrod swings the rocker, and the rocker compresses the inboard shock. It’s the most “mechanism-y” type — the trick is that the rocker carries both of its joints as children, so when it swings, the pushrod stays attached and the shock compresses.

Parts → roles

Hierarchy — note the rocker’s children

XX
├── XX_Hub                Hub · SteerCamber
│   ├── XX_LowerArm_end    (no component)
│   ├── XX_UpperArm_end    (no component)
│   └── XX_Push_drive      (no component — what the rocker aims at, so it swings with travel)
├── XX_UpperArm / XX_LowerArm    (Arms)
├── XX_Pushrod            Arm → XX_Rocker_in
├── XX_Rocker             Arm → XX_Push_drive          (pivot = the fixed rocker pivot)
│   ├── XX_Rocker_in       (no component — pushrod's Outer Target)
│   └── XX_Shock_low       (no component — Shock's Lower Mount)
├── XX_Tophat             (Shock Tophat — fixed)
└── XX_Spring             Shock

How the chain works

1. Rocker is an Arm pinned at its fixed pivot, aiming at XX_Push_drive (a marker on the hub). As the wheel travels, that marker moves, so the rocker swings — this is what drives the mechanism.
2. The rocker’s two joints, XX_Rocker_in (pushrod end) and XX_Shock_low (shock end), are children of the rocker, so they swing with it.
3. The pushrod (Arm, Telescopes ON) connects the hub’s lower joint to XX_Rocker_in, staying attached as the rocker moves.
4. The shock spans the fixed Tophat to XX_Shock_low on the rocker → it compresses as the rocker swings.

Type gotchas

• The two rocker joints must be children of the rocker bone — that’s the whole trick. If they’re not, the pushrod and shock won’t follow the rocker.
• Turn the rocker’s Telescopes OFF — it’s a rigid bellcrank that only rotates; it shouldn’t stretch.
• This is a visual approximation of the pushrod 4-bar linkage, not a physics solve — the rocker swing is driven by aiming at the hub, which looks right through normal travel. Tune XX_Push_drive’s position on the hub to get the rocker throw you want.
• A pullrod is the same thing flipped (rocker low, shock driven in tension) — identical setup, just mirrored geometry.