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(c)

Vehicle with leaf springs to be allowed the use of lowering blocks, and coil springs allowed to be cut. (d) Differential mounting points on the chassis or body may be strengthened with 100mm x 100mm x 3mm maximum size but the mounting position may not be changed. T13-1-7 Front Bumpers (a) To be made from maximum 50mm pipe or RHS, can be extended forward of the original bumper position by 100mm, by using maximum 50mm OD pipe, or RHS. This must not extend more than 375mm along the chassis rail. (b) Bumper material to be of 4mm maximum thickness. (c) When using RHS bumper must be on flat not on edge.

Rule T13 -1 -7 Gussets

Bumper

Body Line 375mm max

Side Brace Bumper Extension (d)

50 mm

(i)

The welds to the chassis extension may be gusseted with two gussets. (ii) A bumper side brace may be fitted between front bumper and bumper extension. (iii) The welds to the side brace may be gusseted with one gusset. (iv) Only six gussets 75mm x 4mm maximum size permitted on front bumper. (e) A maximum of two jointing slugs permitted inside bumper to join bumper ends to front bumper centre: one jointing slug each side, slug to be 4mm maximum thickness size. Jointing slugs are permitted to extend up to 50mm either side of bumper joint weld. (f) Bumper ends are to be mechanically rounded by bender or, if cut and welded, to have a rounded outer radius of 140mm minimum (see diagram) and curve back inside bodyline of car. Bumper end may be welded to the side brace. No shear bolt corners and no square corners. No sharp corners. (g) Front bumper ends must not protrude any more than 50mm past original skin line of body. T13-1-8 Rear Bumper (a) Rear Bumper may be made from 50mm OD pipe or 50mm OD RHS (maximum size) covered by original bumper or similar (optional), to be securely welded. (b) Bumper material to be of 4mm maximum thickness. (c) When using RHS bumper must be on flat not on edge. (d) A maximum of two jointing slugs permitted inside bumper to join bumper ends to rear bumper centre: one jointing slug each side, slug to be 4mm maximum thickness size. Jointing slugs permitted to extend up to 50mm either side of bumper joint weld. (e) Bumper may extend along the side of the car to the wheel arch. Ends of pipe or RHS to be mechanically rounded or, if cut and welded, to have a rounded outer radius of 140mm minimum

2010 ELECTRONIC RULEBOOK

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2010 NZ Speedway Rule Book  
2010 NZ Speedway Rule Book  

2010 NZ Speedway Rule Book

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