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ASP- Additional Sidewall Protection

Informal document No . GRRF-62-02 (62nd GRRF, 25-28 September 2007, agenda item 9.(e)). ASP- Additional Sidewall Protection. Presentation for GRRF 62nd session 25–28 September 2007. Definition ASP.

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ASP- Additional Sidewall Protection

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  1. Informal document No. GRRF-62-02 (62nd GRRF, 25-28 September 2007, agenda item 9.(e)) ASP- Additional Sidewall Protection Presentation for GRRF 62nd session 25–28 September 2007 BIPAVER

  2. Definition ASP • "Additional Sidewall Protection (ASP)" is an additional protective rubber layer applied to one sidewall only of the casing for improving resistance against sidewall abrasion." • Purpose of ASP: …”enhancing safety and durability of tyres in urban use”….“to provide additional abrasion protection of the sidewall in aggressive urban usage” BIPAVER

  3. How does it work? • Casing sidewall is inspected and buffedPRECURE: MOLDCURE: • Cushion is applied • Pre-cured ASP is applied - Un-vulcanized wear rubber applied ASP- wearing rubber Cushion-binding rubber BIPAVER

  4. Application cushion BIPAVER

  5. Application of ASP BIPAVER

  6. ASP ready for vulcanization BIPAVER

  7. The “issue” • For tyres with overall max section width limited to +2% the application of ASP might exceed max overall section width of ECE 109 :315/80R22.5315/70R22.513R22.5 • The BIPAVER proposal only deal with tyres exceeding max ECE-R109 Overall section width and with a section width exceeding 305mm . BIPAVER

  8. Final Product • Total section width is Max 8 mm wider than max section width of a new original tire permitted by Reg. 54. Additional thickness max 8mm BIPAVER proposal:Max Overall width up to max 8mm BIPAVER

  9. Example: 315/80R22.5Amended ECE 109: Max R54 + 1,5 % = 323 mm Max R54: 318 mm R109: +1,5% = 323 mm BIPAVER

  10. Example: 315/80R22.5Amended ECE 109: Max R54 + 1,5 % = 323 mmASP only on one side permissible, when tyre is exceeding 323 mm ! Facing outwards: The word ASP Marking OUTSIDE Facing inwards: The word ASP Max R54: 318 mm R109: +1,5% = 323 mm No additional reductionof dual spacing vs. amended ECE 109 ASP: Max R54 + 8 mmASP: Max 326 mm BIPAVER

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