Know your rubber...
To help riders understand tyre technology and the mechanical properties of advanced rubber compounds we here at Rockitrubber.com have put together the following information pack. We feel it is necessary for the rider to understand performance characteristics of various rubber compounds and tread patterns so that they can correctly select tyres for their riding environment.
When a rubber mass (RockIt Rubber) presses against another solid mass (Rock) under normal force and slides along the interface, an adhesive force acts between the masses through molecular attraction on the contact surface and resists sliding. If the surface of the solid mass is uneven, the rubber tries to fill out the unevenness by compressive deformation because of its low elasticity. Consequently, when sliding occurs along the interface, the areas on the rubber colliding with the convex areas on the solid surface are subjected to compression; when it encounters the other side of the convex areas or the concave areas, the rubber is released from that compression or stretches the opposite way. The difference in deformation energy coming and going through localised repetition, that is, hysteresis loss, acts as friction and is consumed in the form of heat energy; the corresponding frictional force acts on the interface... otherwise known as RockIting.
RockIt Rubber HE-01 (Hard Enduro Super Soft) 140/80 18 is currently being tested in South African enduro conditions. The rubber compound molecular structure has been carefully modified to offer maximum grip in technical rocky outcrops as well as wet conditions on hard surfaces. The super soft compound was selected to provide maximum hysteresis force which equates to maximum traction and RockIt performance.
The HE-01 tread pattern was designed to meet FIM Enduro Specifications. The medium knobbly spacing with increased knobbly dimensions offer maximum grip due to increased contact area on all surfaces while still complying to the strict FIM specification. The HE-01 also features a self-cleaning design which has proven to be very effective in muddy conditions during RockIt Rubber’s R&D testing.
The HE-01 has been manufactured with a low ply rating to give the tyre carcass maximum flexibility which provides maximum low speed traction in technical sections. A flexible carcass allows the tread maximum surface footprint to prevent wheel spin. RockIt Rubber recommends the use of a soft mousse with the HE-01 either a 140/80 18 or 120/100 18 size. The 120/100 18 size mousse fitted to 140/80 18 HE-01 tyre allows more room for carcass flex.
RockIt Rubber has selected the 140/80 18 for the HE-01 rear as the width provides optimum tyre footprint which allows maximum traction in all hard enduro environments. The 140/80 18 size is also in-line with FIM regulations.
RockIt Rubber - Motorcycle Tyres for South African Hard Enduro Terrain. Designed by passionate riders for optimum performance.