Originally Posted by JimmyMac

For the front, the 415... they have 2 different caster blocks/c-hubs. A 2° block and a 4° block. The 416 comes with 4° blocks.

Shock length. The manual doesn't state what they should be. Mine are 61.55mm fully extended from top to bottom. Rebound. If you do it according to the manual (pull the shaft all the way down), you'll have 100% rebound. You can alter this to adjust how you want the shocks to react. I think somewhere on here mentions how to adjust it to have different rebound.

Pulley is mounted low or down when setup as per manual.

Suspension mounts. The front of the car has a front and rear suspension mount. And the rear of the car has front and rear suspension mounts. Tamiya sells suspension mount plates/shims (1mm and 0.5mm) that you can place under these mounts to change roll centers. Or you can use them to add kick up, anti squat, pro dive, etc. As per manual, there are no suspension mount spacers. And the arms on front and rear are level.

Rear axle. On the 415/Evo cars you can change the rear hubs from 0° hubs to 1° hubs. The 416 comes with 0° rear hubs.

Lower deck is the main chassis. The big graphite plate that everything bolts down to. Some 415 cars have thick 4mm chassis. Some are 2.5mm. Some are 2.25mm. Ours is 2.25mm I beleive.

Ground clearance is ride height. The distance from the ground to the bottom of the chassis. This is measured with the car fully loaded with batteries, tires, and electronics all on the car.

Front suspension mount F and R on our cars are 1B on the front. And 1A on the rear. You can change these to alter the front arms sweep/angling back. You can also change these to adjust the front width of the car.

Rear suspension mount F and R on our cars are 1XB on the front. And 1D on the rear. You can change these to alter the rear toe in. Or also to adjust the rear width of the car.

Front and Rear arm spacers. Look to where the arrows are pointing. It points to the shims that you placed on the inner hinge pins on your arms. Where it points to for the front of the car, you should have a 2.5mm spacer there. Where it points to for the rear of the car, you should have a 1mm spacer there. (if built according to manual.) You can move these shims from the front of the arms to the back of the arms to adjust your wheel base. Total shims on the front hinge pin is 4.5mm. Total shims on the rear hinge pin is also 4.5mm. Hopefully you get the picture.

Hope this helps out.