Btw those gold rims look really cool, how much did it cost?
Regarding diaphragm, it is that the rubber hardens with time and it fails to function properly, like a new one. It doesn't need to have any cracks or holes to go bad. Mine was changed at 17k and what a huge difference it made!!



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. I guess they deliberately manufacture tires for Track usage for a limited time/laps.
Every site & shop I have visited have/had a Ceat Vertigo 120/80 17".. Is this a new tyre.? What was the size of the IRC.??

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