Principal grooves definition

Principal grooves means the wide circumferential grooves positioned in the central zone of the tyre tread, which, in the case of passenger and light truck (commercial) tyres, have the treadwear indicators located in the base.
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Principal grooves means the wide grooves positioned in the central zone of the tyre tread, which, in the case of passenger and light truck (commercial) tyres, have the treadwear indicators located in the base;
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Principal grooves means the wide grooves situated in the central zone of the tread, which cover approximately three-quarters of the breadth of the tread.
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Examples of Principal grooves in a sentence

  • Principal grooves" Principal grooves" means the wide circumferential grooves situated positioned in the central zone of the tyre tread, which cover approximately three-quarters of the breadth of the tread have the tread-wear indicators located in the base.


More Definitions of Principal grooves

Principal grooves means the wide circumferential grooves positioned in the central zone of the tyre tread, which have the tread-wear indicators located in the base."
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Principal grooves means the wide grooves positioned in the central zone of the tyre tread, which have the tread-wear indicators (see para. 2.27) located inside them.
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Principal grooves means the wide grooves positioned in the central zone of the tyre tread, which, in the case of passenger and light truck (commercial) tyres, have the treadwear indicators located in the base. [2.15. “Void to fill ratio” means …..] 2.16. “Standard reference test tyre” (SRTT) means a tyre that is produced, controlled and stored in accordance with the ASTM (American Society for Testing and Materials) standards E1136-93 (2003) (size P195/75R14) or F2493-08 (size P 225/60R16). 2.17. Wet Grip measurements – Specific definitions 2.17.1 "Adhesion on wet surfaces" means the relative braking performance, on a wet surface, of a test vehicle equipped with the candidate tyre in comparison to that of the same test vehicle equipped with a reference tyre (SRTT).2.17.2 "Candidate tyre" means a tyre, representative of the type, that is submitted for approval in accordance with this Regulation. 2.17.3 "Control tyre" means a normal production tyre that is used to establish the wet grip performance of tyre sizes unable to be fitted to the same vehicle as the standard reference test tyre – see paragraph 2.2.2.16. of Annex 5 to this Regulation. 2.17.4 "Wet grip index ("G")" means the ratio between the performance of the candidate tyre and the performance of the standard reference test tyre. 2.17.5 "Peak brake force coefficient ("pbfc")" means the maximum value of the ratio of braking force to vertical load on the tyre prior to wheel lock-up. 2.17.6 "Mean fully developed deceleration ("mfdd")" means the average deceleration calculated on the basis of the measured distance recorded when decelerating a vehicle between two specified speeds. 2.17.7 "Coupling (hitch) height" means the height when measured perpendicularly from the centre of the articulation point of the trailer towing coupling or hitch to the ground, when the towing vehicle and trailer are coupled together. The vehicle and trailer must be standing on level pavement surface in its test mode complete with the appropriate tyre(s) to be used in the particular test. 2.18 Rolling resistance measurement – specific definitions Formatted: Indent: Left: 0 cm, Outline numbered + Level: 2 + Numbering Style: 1, 2, 3, …+ Start at: 18 + Alignment: Left+ Aligned at: 1.9 cm + Tab after: 0 cm + Indent at: 2.75 cm2.18. 1 Rolling ResistanceFrloss of energy (or energy consumed) per unit of distance traveled. 1/ 2.18.2. Rolling resistance coefficient Crratio of the rolling resistance to the load on the tyre. 2/ 2.18.3 New test tyre[Tyre whi...
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Principal grooves means the wide grooves situated in the central zone of the tread, which cover approximately three-quarters of the breadth of the tread;
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