This drum was developed in the same principle as the old Wellworthy drum with an
aluminium outer case and cast iron liner but this drums employs a unique mechanical
locking system designed to ensure that during the repeated expansion and contraction
of materials under the most extreme working conditions it is impossible for the liner
to move axially or circumferentially. Racemettle brake drums are built to the highest
standards of quality and design to match or exceed the appearance and performance
of the original aluminium brake drums. Our drum comprises a cast iron insert that
is placed at temperature into a high integrity boxless sand casting system and is
then encapsulated in an aluminium alloy chosen to give low differential expansion
and high elasticity. Design of the drum is optimised to increase aluminium flow avoiding
entrapment of air. Material analysis performed before each melt ensures consistency
to the manufacturing process maintaining the high level of quality and accuracy to
The drum was developed to provide increased breaking efficiency by reducing brake
fade. Aluminium having good thermal properties to dissipate the heat to the atmosphere
that is generated under braking also brings the benefit of weight saving, a typical
10” drum being over 0.5 kg lighter than its cast iron equivalent.
ABD001 9” Triumph TR2 - TR6 £250.00 each
ABD002 MG TA, TB & TC £250.00 each
ABD003 Morgan (Wires) £285.00 each
ABD004 Morgan +8 (Alloys) £285.00 each
ABD007 MGA (Steel & rear wires) MGB (Steel & Banjo axle) £250.00 each
ABD008 MGB (Steel & tube axle) £250.00 each
ABD009 MGB (Wires & banjo axle) £250.00 each
ABD010 10” Triumph TR2 - TR3 £250.00 each
ABD011 MGB (Wires & tube axle) £250.00 each
ABD012 Jaguar XK (Front 16” wires) £395.00 each
ABD013 Jaguar XK (Rear 15” or 16” wires) £375.00 each
Prices EXCLUDE VAT and delivery
LIGHTWEIGHT RACE DRUM
Massive heat dissipation all but eliminates brake fade.
Virtually all aluminium gives significant weight reduction.
Circumferential fins prevent ovality.
New high tech process.
Made in England.
Our lightweight drum is of a completely new design that can save 2kg or more per
drum rolling weight.
Machined from a solid aluminium bar, an inner extremely hard wearing friction surface
less than 1mm thick is chemically bonded to the aluminium to produce a lightweight
and very thermally efficient brake drum. Circumferential fins are efficient at dissipating
heat and give added strength to prevent ovality.
Designed for fast road and race cars, in our tests, no brake fade could be detected
by the race drivers whose lap times were consistent from first to last lap. On returning
to the paddock, the drums were cool enough to be removed with unprotected hands.
As no cast iron inner ring is fitted, the drum can be designed to the same dimensions
as the original cast iron drums. In this way, it is possible for us to duplicate
almost any existing drum provided the fins will fit into the wheel.
The drums in the above picture are of a Ferrari 166 Lightweight and MG TA Afin but
we have also produced drums for the Lotus 20, Morgan, Triumph TR, TVR, MG TA/B/C,
MGB, Jaguar XK, Austin Healey and pre-war Bentley or we can copy original drums.
Prices for the special lightweight drums start with 9” and less diameter at £945+VAT
per drum. Manufacture time is 6-8 weeks.