Tyre Design problems in the Industry .
Compound Performance can be broken into the following classifications :-
A Simplified Compound Classification:
Tyre Manufacturers have developed different compound philosophies over the years on what constitutes the best Physical Properties when it comes to Cut , Tread Wear , Heat and Damage Resistance . These compound formulations will therefore perform differently depending on the Product Dimensions , Tread Pattern , Tyre Profile , pattern Depth , Tread Hardness and Operational/Underfoot Conditions .
So when using the "Tyre Comparison Report Calculator" it will provide a good guide as to the Performance Capability of a product .
The OTR Industry Compound Range is primarily broken into three main classifications and further split by the higher level of Heat Resistance (H+) and Cut Resistance (C+) . All Compounds have a level of Wear , Heat and Cut Resistance , but it is the dominant feature that is used to classify it :
A Heat Resistant Compound with slightly more Cut Resistance is coded as HRC-C+ , or a Cut Resistant Compound with slightly more Heat Resistance would be coded as CRC-H+ .
Generally a Tyre's Wear Resistance is defined by the Compounds degree of Cut Resistance . The Goodyear 6S and Michelin A4 Compounds are classed as High Cut Resistance so it is expected that if Chipping and Chunking of the Tread is not an issue then they should deliver good wear , but would be limited in terms of speed capability .
Some Tyre Brands believe that the range of operational conditions can be adequately covered by only three compounds . Bridgestone is a classical example of this , where they are able to be just as competitive with fewer compound options .