Switching to Pirelli Trefeo R
- Thread starter khalid0
- Start date
Original 325/30-20 = ((325*.3) x 2)/25.4 + 20 = 27.68 dia
315/30-20 =((315*.3) x 2)/25.4 + 20 = 27.44 dia
335/30-20 =((335*.3) x 2)/25.4 + 20 = 27.91 dia
One is 6mm taller (3mm on radius) & 10mm wider (5mm from center out) and the other is 6mm shorter and 10mm narrower.
Safest bet would be to go to the 315/30 - they'll definitely fit.... but obviously a little narrower than stock.
I would assume the 335/30 would work too but you take a small risk in rubbing?
315/30-20 =((315*.3) x 2)/25.4 + 20 = 27.44 dia
335/30-20 =((335*.3) x 2)/25.4 + 20 = 27.91 dia
One is 6mm taller (3mm on radius) & 10mm wider (5mm from center out) and the other is 6mm shorter and 10mm narrower.
Safest bet would be to go to the 315/30 - they'll definitely fit.... but obviously a little narrower than stock.
I would assume the 335/30 would work too but you take a small risk in rubbing?
texas mongrel
GT Owner
I have switched to Trefeo R after Michelin cup 2 on my other cars and it’s like day and night difference, much more grip and confidence.
texas mongrel
GT Owner
Interesting, I’ve had the opposite experience, got rid of the Pirellis on my McLaren and fitted PSC2s