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RF7 108mm Radial Brake Calipers vs Wilwood Forged Narrow Superlite Radial Mount Caliper 108mm

Buy the RF7 if you want a direct 108mm radial bolt-on with pads and spacers in the box for a SuperGear or stock 300mm setup. Buy the Wilwood Forged Narrow Superlite if you need a proven 4-piston stainless-piston caliper for a custom big-brake build up to a 14.00-inch rotor. No prices were given for either caliper, so compare live store prices on this page before deciding.

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RF7
RF7 108mm Radial Brake Calipers

RF7 108mm Radial Brake Calipers

Choose the RF7 if you want a mirror-nickel forged caliper that bolts straight onto a 108mm radial mount with pads and 13-inch rotor spacers included.

Pros
  • Direct bolt-on for 108mm radial mounts, including SuperGear fitments
  • Pads, hardware and oversized-rotor spacers come in the box
  • Stated ABS and non-ABS compatibility
  • Forged aluminum with a mirror nickel finish
    • Cons
    • Piston count and piston area are not published
    • 13-inch rotor ceiling limits big-brake builds
    • Aluminum pistons are less heat-resistant than stainless
    Wilwood
    Wilwood Forged Narrow Superlite Radial Mount Caliper 108mm

    Wilwood Forged Narrow Superlite Radial Mount Caliper 108mm

    Choose the Wilwood Forged Narrow Superlite if you are building a custom big-brake setup and want stainless pistons and a 14.00-inch rotor ceiling.

    Pros
    • Four stainless pistons with published 1.98 sq in area
    • Fits rotors up to 14.00 in and 1.10 in wide
    • Radial mount gives two planes of alignment adjustment
    • Long-running Superlite series with broad vehicle coverage
    Cons
    • Pads and mounting hardware are not included
    • No stated ABS compatibility
    • Finish options are not specified in the listing

    What separates them

    RF7 108mm Radial Brake CalipersWilwood Forged Narrow Superlite Radial Mount Caliper 108mm
    Piston materialAluminum alloy pistonsStainless steel pistons
    Piston count and areaNot published; radial 108mm body4 pistons, 1.98 sq in total area, 1.12 in each
    Max rotor diameter13 in (330mm) with included spacers14.00 in
    Rotor widthNot published1.10 in
    MountingDirect bolt-on for 108mm radial and SuperGear radial fitments5.98 in radial mount, two planes of adjustment
    Included hardwarePads, hardware and 13-inch rotor spacersCaliper only; pads and hardware sold separately
    FinishMirror nickelWilwood standard finish (not specified)
    ABS compatibilityStated compatible with ABS and non-ABSNot stated

    Price history

    • RF7 108mm Radial Brake Calipers: lowest $798.00 on Nov 2 at SuperGear Performance.
    • Wilwood Forged Narrow Superlite Radial Mount Caliper 108mm: lowest $430.93 on Nov 2 at eBay.

    Prices at every store

    RF7 108mm Radial Brake Calipers

    • SuperGear PerformanceCheck price at SuperGear Performance
    • SuperGear PerformanceCheck price at SuperGear Performance
    Prices and history →

    Wilwood Forged Narrow Superlite Radial Mount Caliper 108mm

    • AR MotorwerkzCheck price at AR Motorwerkz
    • eBayCheck price at eBay
    • WalmartCheck price at Walmart
    Prices and history →

    Specs compared

    SpecRF7 108mm Radial Brake CalipersWilwood Forged Narrow Superlite Radial Mount Caliper 108mm
    MaterialForged aluminum alloy—
    FinishMirror Nickel—
    Rotor compatibility11.8"–13" (300–330mm)—
    ABS compatibilityCompatible with ABS & non-ABS applications—
    Included hardwareHigh-performance brake pads and necessary hardw…—
    Piston Count—4
    Piston Type—Stainless
    Piston Area—1.98
    Piston 1 Dia—1.12
    Piston 2 Dia—1.12
    Mount Description—5.98" Radial Mount
    Rotor Width—1.10
    Show all 14 specsShow fewer specs
    SpecRF7 108mm Radial Brake CalipersWilwood Forged Narrow Superlite Radial Mount Caliper 108mm
    Max Rotor Dia—14.00
    Pad Volume—3.8

    Questions and answers

    Which caliper is better for a stock 300mm rotor?
    The RF7. It is listed as a direct bolt-on for OEM 300mm rotor kits on 108mm radial mounts, and it ships with pads and hardware.
    Can the Wilwood fit a 13-inch rotor?
    Yes. Its 14.00-inch maximum rotor diameter covers 13-inch discs, but you need the correct radial mount bracket and pads, which are not included.
    Which has better heat resistance?
    The Wilwood, because its four pistons are stainless steel. The RF7 uses aluminum alloy pistons, which shed heat less well under repeated hard braking.
    Is the RF7 worth it over the Wilwood?
    If you want a bolt-on swap with pads and spacers included, yes. If you are building a custom big-brake setup, the Wilwood's stainless pistons and 14-inch rotor ceiling are worth the extra parts shopping.
    Do both fit 108mm radial mounts?
    Yes. The RF7 is built for 108mm radial systems, and the Wilwood uses a 5.98-inch (about 152mm) radial mount, so check your fork or bracket spacing before ordering.
    Which is easier to install?
    The RF7, since it bolts on with included hardware and spacers. The Wilwood needs separate pads, a mount bracket and alignment setup.

    More comparisons

    • RF7 108mm Radial Brake Calipers vs Brembo GP4-RS Caliper
    • Brembo GP4-RS Caliper vs Wilwood Forged Narrow Superlite Radial Mount Caliper 108mm