![](https://shop.alfissimo.com/4725-large_default/front-upright-modification-increased-scrub-radiusmechanical-trail.jpg)
![](https://shop.alfissimo.com/4725-large_default/front-upright-modification-increased-scrub-radiusmechanical-trail.jpg)
Special Order. Exchange Program
Security policy
Delivery policy
Return policy
Front Upright (Motorsport) Modification- Increased Scrub radius/Mechanical Trail (Giulia)
Increase Mechanical Trail to Improve Road Feel and Stability. Engineered by an IMSA/F1 engineer for us. Exclusive modification.
Giulia QV mechanical trail:
"The +6.4 mm mechanical trail (the distance in the side view from the steering axis to the center of the tire at the ground), increases the torque around the steering axis when the steering wheel is turned. It also increases the self-centering forces when the wheels are turned due to the larger moment arm created by the increased trail. The result is more steering wheel torque build up versus steering wheel angle which increases steering feel when cornering.”
To put it another way. Mechanical trail is one of the two important forces your wheels encounter. A long trail may make the driving experience easier, but a shorter trail typically allows for greater control. The reasons why this trail is positive are because: It ensures the wheel is essentially pulled.
Testing and Results:
Modification:
You can either send us your Uprights to be modified (2-3 weeks) or
You can purchase uprights for us to modify.
Includes:
(2) Upright Modification L/R (steel or CCM brakes) 2.0L or 2.9L
(8) SHCS M12x1.75x60
(8) pinch nuts M12x1.75,
(4) SHCS M12x1.75x75, caliper bolts NC
(4) 1" ODx0.25" long spacers, caliper spacers
* Exchange program- Return your unmodified uprights so we can keep this program going.
Conclusion
The increase in mechanical trail provides the driver with more measured and confidence inspiring handling. The jittery Xbox video quick handling is dialed out, and road feel is increased for better input.