WIDE 5 RACING HUB DYNAMIC ROTOR MOUNT SYSTEM:
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Racers in the Wide-5 hub equipped categories are now able to utilize the proven performance advantages of dynamic or "floating" mount rotors.

Why Float Mount?
Cast iron, steel, and aluminum have measurable differences in their thermal expansion rates. Rotors and hubs also operate in vastly different temperature ranges based on their proximity to the brake pads and cooling air. In sustained high heat competition, these thermal variances can create potentially damaging stresses at the rotor mount tabs and rotor bolt stands when the rotor is rigidly attached to the hub. Thermal distortion, uneven pad build-up and rotor wear can all lead to pulsing, excessive pad knock-back, or other undesirable pedal feedback to the driver.


Wide 5 Racing Hub Floater Assembly Showing T-Nut Placement with Rotor and Mounting Plate
By "float" mounting the rotor, these negative characteristics can all be eliminated. The results are felt with truer running, smoother engagement, extended reliability, and consistent pedal feel after every lap. Wilwood's dynamic rotor mounting system is simply the most accurate and durable method of damping pad engagement harmonics, controlling pad knock-back, and isolating the thermal stresses that can occur between the rotor and the hub mounts.

Wide 5 Racing Hub Floater Assembly Showing Individual Major Components

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Dynamic Mount System Features:

  • Hubs for use with dynamic mount plates feature specially machined bolt stands that compensate for the plate thickness and position the rotor at the standard offset location. This eliminates any need for caliper relocation when changing to the dynamic rotor mount system. The Starlite "55" series hubs feature 5 bolt rear drive flanges with Snap-Cap front hubcaps. They are the strongest lightweight hubs in the industry. The Starlite "V" series hubs use traditional 8 bolt rear drive flanges and bolt-on front hubcaps.
  • High strength steel, dynamic mounting plates bolt solidly to the hubs and place the float between the plate and the rotor through the special mounting bolt and t-nut system.
  • Square faced t-nuts bolt solidly to standard 5/16" mount hole rotors and float within the slots on the mount plate. T-nuts provide a substantially larger load bearing area as compared to the round pin and bobbin type dynamic mounts that require slotted hole rotors. An assembly tool is provided with each bolt and t-nut kit to correctly position the t-nut during installation to assure bind-free operation.
  • Use with any standard 8 on 7.00" mount pattern rotors with 5/16" bolt holes. This provides a wide range of rotor choices with a substantially more cost effective and durable mount as compared to slotted hole rotors.

Ordering Information: Dynamic Mount Hubs, Plates and Bolt Kits

Wide 5 Hubs:
Part No.
Starlite "55" Front Hub with Snap-Cap, Standard 5/8" Coarse Thread Studs
270-8436C
Starlite "55" Front Hub with Snap-Cap, Drilled 5/8" Coarse Thread Studs
270-8436D
Starlite "55' Rear Five Bolt Hub, Standard 5/8" Coarse Thread Studs
270-8435C
Starlite "55' Rear Five Bolt Hub, Drilled 5/8" Coarse Thread Studs
270-8435D
Starlite "V" Eight Bolt Hub, Standard 5/8” Coarse Thread Studs
270-8434C
Starlite "V" Eight Bolt Hub, Drilled 5/8” Coarse Thread Studs
270-8434D

Dynamic Rotor Mount Plate:
Mount Plates for Machined Wide 5 Hubs
300-8431

Rotor to Plate Bolt Kit with T-Nuts and Installation Tool:
Grade 8 Socket Head, Lock Wire Drilled with AN Washers
230-8454

Plate to Hub Bolt Kits:
Grade 8 Hex Head with Split Lock Washers
230-0526
Grade 8 Socket Head, Lock Wire Drilled with Stainless Washers
230-2589

Wide 5 Hub Installation Parts and Accessories:
Five Bolt Drive Flange with Bolts & Washers, Black
270-6732
Five Bolt Drive Flange with Bolts & Washers, Lightweight, Silver
270-6733
Bolt Kit with Washers for Five Bolt Drive Flange (included with flanges)
230-6911
Snap-Cap Front Hub Cap for Starlite "55" (included with hubs)
270-6913
Eight Bolt Drive Flange, Gold
270-2290
Eight Bolt Drive Flange, Red
270-2290R
Eight Bolt Drive Flange, Black
270-2290B
Front Hub Cap for Eight Bolt Hubs
270-0374
Bolt Kit with Washers for Eight Bolt Drive Flanges
230-1378
Bearing, Seal, and Spindle Lock Assembly - All Wide 5's
370-6885
Lug Nuts, 5/8" Coarse Steel, 5 pack
230-0622


Starlite "55" Front Assembly

Starlite "55" Rear Assembly

Starlite "V" Eight Bolt Hub

Dynamic Rotor Mount Plate

Lightweight 5 Bolt Drive Flange

Rotor to Plate Bolt Kit

Plate to Hub Bolt Kit

Bearing, Seal and Locknut Kit