custom frames are "made to measure". In order
to ensure a perfect fit between man or woman and machine,
we have used a special fitting jig for over
30 years. This
jig allows us to alter the frame size, top tube length,
seat tube angle and handlebar extension length. We can also
change the pedals, saddle and handlebars to suit the customer.
rider pedals on the jig against a resistance, which can
be altered electronically. We can measure cadence, speed,
power output and pulse rate. Using this information together
with our expertise from many years of experience, the rider's
position is adjusted to obtain optimum pedalling efficiency.
The type of riding to be undertaken governs the other position
parameters, and when both customer and ourselves are satisfied
with the final position, we take the measurements from the
information from the jig is then entered into the computer
program, which we have developed to calculate each frame
tube length and mitre angle. We also enter the steering
geometry details, which depend largely on the use of the
frame, together with the brake depths, to obtain the precise
geometry of the frame and forks. This data is then used
to cut the tubes accurately.
achieve the precision required, the frame tubes are mitred
and cut to length on a lathe, using purpose made tooling.
All frames are built on jigs, which we have designed to
ensure that the frame is true, and in track and also without
any built in stresses after brazing.
The prepared tubes are first assembled on the frame jig
and all the joints inspected to check that each tube mitre
fits perfectly and that the frame angles are correct.
The jig is then locked in position. If the frame is to be
built with lugs these are now fitted. This procedure ensures
that all the tubes fit to each other inside the lugs, which
is the secret of a responsive frame. The frame is then brazed,
using silver or nickel bronze brazing rods, depending on
the type of tube being used to build the frame.
The front forks are built in a similar fashion on a fork
brazing, the frame and forks are shot blasted to remove
all of the brazing flux. They are then inspected and the
lugs filed prior to any fittings being silver brazed onto
the tubes. After the cable guides, bottle cage bosses, etc
are fitted, the frame and forks are again inspected and
finally shot blasted ready for painting.
the paint shop more >
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