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Hi Jellero,
The tread patterns are different. The front tire must maintain traction during hard braking, the rear during acceleration. The rear tire is exposed to the twisting forces applied to it during acceleration. the rear has to have a larger cross section to maintain traction during that time. The front has a much rounder profile and a narrower radius to facilitate direction changes. The compunds are different with the front being a softer compound. The reason being the rear would be gone in short order with today's high powered engines if it were as soft as the front. The front is also smaller to reduce the reciprocating mass and the rotational forces on the front. This helps with suspension and also handling, and braking by reducing unsprung weight, the gyroscope effect, and the amount of rotating mass the front brake is fighting.
Hope this helps
Preachp
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Cruisin\' the byways of life for Christ
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