fyxomatosis - the fixed gear / track bike disease - photography - Vintage Track Frames - Velo entertainment for kids, big and small. July 22 2008 16:28:50
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Frames and Parts
DVHCP

BF's Gravity ride.

Born of the same era as Gonz's. Circa 1992.

Modelled by photograhping the geometry of the GONZ LAB, and editing it with physiological pilot overlay with early PS Illustrator (WAY back in 1992 - pre-email).

A full print out of the frame then become the framework for the actual material formation of DVHCP.

Wheelbase has now been shortened to conform to the Gravity Bike race regulations - see bottom of page.

Tough is the key word here.

Sharp edges and harsh contrasts of matt black and milled aluminium blocks.

But which rig is faster - and what does DVHCP mean?

















X. GRAVITY BIKE SPECIFICATIONS

 A. FRAME: Bike frame must be free of any cracks or rust. All welds must be in good condition.

B. WEIGHT: Total weight of the bike, rider and all protective gear in racing configuration cannot exceed one-hundred-thirty-two kilograms (132kg / 290lbs). The complete bike cannot exceed thirty-four kilograms (34kg / 75lbs). Soft ballast added to the rider’s body cannot exceed ten kilograms (10kg / 22lbs). If a heavyweight rider is unable to comply with the maximum combined weight rule (132kg / 290lbs), they will still
be allowed to compete if their bike does not exceed sixteen kilograms (16kg / 35lbs). No added ballast will be permitted on either the bike or the body of overweight riders. A 1kg allowance will be given for variances
in the accuracy of scales.


C. LENGTH: Wheel base (axle to axle) must not exceed one hundred twenty-seven centimeters (127cm / 50”).

D. FAIRINGS: Small fairings to accommodate numbers are allowed on the front and rear.

1. Front: A small fairing of any size or shape that can be designed to fit inside a box with the dimensions twenty-three centimeters (23cm / 10”) by thirty-one centimeters (31cm / 12”) is allowed.

2. Rear: A small fender like tailpiece can extend a maximum of ten centimeters (10cm / 3 15/16”) beyond
the rear tire. It cannot exceed fifteen centimeters (15cm / 6”) in width.

E. FRONT END: No part of the bike can protrude past the front tire.

F. BRAKES: Bikes must have working front and rear brakes. Brakes must be adequate to stop the bike in one hundred meters (100m / 300’) from a speed of one hundred kilometers per hour (100kph / 62mph) or the rider
will be disqualified. Disc type brakes are recommended.

G. WHEELS: Wheel size cannot exceed fifty-one centimeters (51cm / 20”). Disk wheels will be allowed on the rear only.

H. TIRES: Tires must be in good condition with no visible cracks in the sidewall or tread. If a particular tire proves to have a significant performance advantage and is not made commercially available* for a reasonable price, it could be specifically banned in the future.

*Commercially available means the product must have been distributed to at least 24 people outside the company.

I. FOOT PEGS / KNEELER BOARDS: Foot pegs at or near the rear axle or kneeler boards are required. Foot pegs must be at least three centimeters (3cm / 1 3/16”) in diameter. Kneeler boards must not have any sharp
corners.

J. HANDLEBARS: Width of handlebars cannot exceed sixty-one centimeters (61cm / 24"). Grips are required and must be in good condition.

K. SEAT: A seat is required and must be securely mounted to the bike. No tape or zip ties.

L. NUMBER AREA: All bikes are required to have three number areas. The IGSA assigned numbers must be a minimum of ten centimeters (10cm / 4”) tall. The numbers must visible on the front and both sides of the bike
when the rider is in place. The number and background must be of contrasting colors and highly visible from six meters (6m / 20’) away. (For number assignments see section XVIII.A)

M. BALLAST: Ballast is allowed on both the bike and the rider to reach the maximum weight limit. Any weight added to the bike must be securely fastened to the frame. Tape, tie wraps or fasteners other than bolts or
hose clamps are not legal for attaching weight. Ballast weight on bikes must be fastened with either a minimum six-millimeter (6mm / ¼”) through bolt or double hose clamps. Ballast weights in excess of one kilogram (1kg / 2.2lbs) will require a minimum of thirteen-millimeter (13mm / ½’) through bolt. Bolt and nut installations must be either cotter keyed or safety wired. Ballast added to the rider must be soft weights only and cannot exceed ten kilograms (10kg / 22lbs). Only shot or sand will be accepted and must be securely contained to avoid spillage on the racecourse. Body weights must be worn under leathers. Tech inspectors are charged to make thorough inspections of weight installation to make sure they meet all safety
requirements.






Posted by fyxomatosis on 02 March 2008 2 Comments · 1381 Reads - Print
Comments
rprznt on March 02 2008 21:56:55
holy cow- there's a race series for these strange things? dan salesmiley
doubleoh2 on March 03 2008 09:38:52
SEE YOU AT BATHURST - I'll bring the keg.
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