VTT is happy to announce its new rear brake conversion kits for the F3X platforms. This is the FIRST and only kit currently on the market that will allow 15″ wheels and tires to be run on the rear. This kit replaces your rear brake rotors and calipers to fit 15″ wheels. It includes lightweight Wilwood calipers to go from the single-piston factory caliper to race-inspired 4 Piston calipers. While dropping up to a whopping 20 LBS of unsprung weight off the back of your vehicle!
The kit consists of:
2 Rotors (Plain Or Slotted) Plain are Centric 125 Series, and Slotted are Genuine Stop-Tech rotors
2 Wilwood 4 Piston Calipers (Choose of Dyna-lite or Dyna-Pro)
1 set of high-performance Wilwood pads BP10 or BP20. (option to remove the pads, and get your own compound pads)
All hardware required for the swap, including brackets. bolts, and adapter fittings
Stainless Steel upgraded rear brakes lines as an option
These kits will bolt directly onto the chassis specified, BUT many different 15” wheels in many different offsets exist, we cannot guarantee this will clear your wheel/tire combo without some clearance. We can 100% say they clear Weld RTS 15×10 as this is what we tested on.
Please note modifications MUST be made to the vehicle to fit this kit. You must remove the rear brake dust shield, and also grind one small casting from the suspension arm.
Conversion weight numbers:
Calipers with pads
Factory Rear Caliper 11.5LBS
Wilwood Rear calipers Dyna-Pro 4.5LBS
Wilwood Rear Calipers Dyna-lite 4.0LBS
Savings of 7-7.5 lbs. per side or 14-15LBS total from Factory Rear brakes to Wilwood 15” conversion
Factory Size Rotor 18.2LBS
Slotted 15” conversion rotor 13.5LBS
Plain 15” conversion rotor 14.4LBS
Savings of 4.7 lbs per side or 9.4 Lbs. total going from a factory rotor to a 15” conversion Slotted Rotor
Savings of .9 LBS going cross-drilled 15” conversion over plain