Road Racing FIM Sidecar World Championship ... - Spelregels

2.3.34 Wheels
The rear wheel and Sidecar wheel shall be enclosed down to the level of the
Sidecar platform on the inside.
The maximum width of the front wheel rim cannot exceed 9”.
The maximum width of the rim for the rear wheel and sidecar wheel cannot
exceed 11”.
2.3.35 Tyres
Slick tyres are authorised.
1) The maximum width of the front tyre tread measured from the point where
the wall of the tyre finishes and the tread pattern starts, to the point where
the tread pattern stops and the wall of the tyre's other side starts (only the
section of the tread pattern normally in contact with the ground is
measured) shall not exceed 230 mm.
2) The rear tyre shall not exceed 254 mm, measured like in point 1)
3) When the springs are compressed to their maximum, there shall still remain
a minimum wheel clearance of 15 mm to every fixed part.
4) The minimum diameter of an inflated tyre shall be 400 mm.
5) Tyres warmers are not allowed
2.3.36 Mudguards and wheel protection
Mudguards shall comply with the following requirements:
1) They shall project laterally beyond the tyre on each side.
2) The front mudguard shall cover at least 100° of the circumference of the
wheel. In this area, the wheel may be covered, respecting the angles
mentioned below. The angle formed by one line drawn from the front edge
of the mudguard to the centre of the wheel and one drawn horizontally
through the centre of the wheel shall be between 45° and 60°. The angle
formed by one line drawn from the rear edge of the mudguard to the centre
of the wheel and one drawn horizontally through the centre of the wheel
shall not exceed 20°.
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