Originally Posted By: CapriRacer
If you want to know if a particular tire has a cap ply - ask the manufacturer!! It's required by law on the sidewall of the tire so it's no secret.
OK ... so to satisfy my curiosity, I went to the car and looked. Sidewall markings are:
TREAD PLIES, 2 Polyester, 1 Polyamide, 2 steel
SIDEWALL PLIES, 2 Polyester.
SO ... if listed in order (good engineers would?), nothing outside the steel so no cap? Capri, how about a link to a website with some more descriptions on tire construction ... all the manufacturers seem to use buzzwords rather than useful diagrams, and of course details are proprietary. This particular example happens to be an H rated Michelin Primacy MXV4. The picture on their website makes me think it MIGHT be polyester/steel/polyester/steel/polyamide making the polyamide (nylon?) a cap ply? I see that French company has a term "crown ply" ... same thing? But which are which ... not explained.
If you want to know if a particular tire has a cap ply - ask the manufacturer!! It's required by law on the sidewall of the tire so it's no secret.
OK ... so to satisfy my curiosity, I went to the car and looked. Sidewall markings are:
TREAD PLIES, 2 Polyester, 1 Polyamide, 2 steel
SIDEWALL PLIES, 2 Polyester.
SO ... if listed in order (good engineers would?), nothing outside the steel so no cap? Capri, how about a link to a website with some more descriptions on tire construction ... all the manufacturers seem to use buzzwords rather than useful diagrams, and of course details are proprietary. This particular example happens to be an H rated Michelin Primacy MXV4. The picture on their website makes me think it MIGHT be polyester/steel/polyester/steel/polyamide making the polyamide (nylon?) a cap ply? I see that French company has a term "crown ply" ... same thing? But which are which ... not explained.