Alfa Romeo 4C lug nut torque

The Alfa Romeo 4C takes 72 lb-ft (98 N·m) on its wheel nuts or bolts; the 2015–2020 manuals all say the same. Tighten them in a star pattern with a torque wrench.

Sources checked

Wheel nut/bolt torque

72lb-ft98N·m

02040608004080120ft-lbN·m
As printed
“Lug Nut/Bolt Torque: 72 Ft-Lbs (98 N·m) M12 x 1.25 17 mm”
Stud thread
M12 x 1.25
Socket
17 mm
Source
2020 Alfa Romeo 4C Spider Owner's Manual: Wheel and Tire Torque Specifications, PDF page 146

Alfa Romeo 4C lug nut torque by model year

Model yearVersionTorqueManual page
2020Spider72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 146
2019Spider72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 259
2018Spider72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 262
2017Coupe72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 195
2017Spider72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 203
2016Coupe72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 240
2016Spider72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 254
2015Coupe72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 224
2015Spider72 lb-ft (98 N·m)Wheel and Tire Torque Specifications, PDF page 230

Read on Alfa Romeo’s own site on October 20, 2026. Years not listed haven’t been checked yet, or their manual prints no value; check your own manual.

How to tighten them

  1. Clean any dirt or rust off the studs, nuts or bolts and the wheel’s mounting face. Don’t oil them unless the manual says to.
  2. Thread every nut or bolt on by hand until it seats against the wheel.
  3. Lower the vehicle so the tire takes its weight, and set a torque wrench to 72 lb-ft (98 N·m).
  4. Tighten the nuts or bolts in a star pattern, going around two or three times, until the wrench clicks on every one.
  5. Check the torque again after a short drive if your manual says to.

What the Alfa Romeo manual adds

  • Tighten the lug nuts/bolts in a star pattern until each nut/bolt has been tightened twice.
  • After 25 miles (40 km) check the lug nut/bolt torque to be sure that all the lug nuts/bolts are properly seated against the wheel.
  • Use only your authorized dealer recommended lug nuts/bolts and clean or remove any dirt or oil before tightening.
  • Use only Alfa Romeo recommended lug nuts/bolts and clean or remove any dirt or oil before tightening.

More detail, including how many passes to make: how to torque lug nuts. Setting and using the wrench: how to use a click torque wrench. Why the manual says “nut/bolt”: lug nuts vs wheel bolts.

Questions

What is the lug nut torque on a Alfa Romeo 4C?

72 lb-ft (98 N·m), as printed in Alfa Romeo’s owner’s manuals (2015–2020).

Can I use an impact wrench?

Not to finish. An impact wrench can’t set a torque and easily overshoots it, which stretches studs. Run the nuts down by hand or lightly, then finish with a torque wrench in a star pattern.

Should I oil the threads?

Not unless the manual says so. Torque values assume clean, dry threads; oil lets the same torque stretch the stud or bolt further. Some manuals, Kia’s and Mazda’s among them, say to keep oil and grease off wheel nuts and bolts altogether.