3.1 5-Speed 1990 Grand Prix Coupe

[94 olds vert]

I thought the frog meant that. Wasn't sure.

[Go4DaMo]

Hahahahaha...the cover says "'88" didnt know if GM made 5 for testing...like the 1983 C4?

[94 olds vert]

Maybe this will clear things up.

[Go4DaMo]

oh boy...I'd love to have a PDF of this...very interesting...thanks! What happened to the 245/45 Goodyears? That tire size never made it to production, correct?

[94 olds vert]

The article says 255/45 Goodyear Gatorbacks. I'm not sure why that tire size never made it into production it would be interesting to find out.

[Go4DaMo]

I'd slap some on my laces if the price was comparable to 245/50s...but the 255/45s are more expensive and are rare to acquire on the used tire market.


EDIT: wrote incorrect tire size

[runt]

My assumption would be too wide for the car. The article says the suspension is limited so it doesn't have the full jounce.

Then again, isn't Matt running 245s on his? So 255 isn't that much wider!

[94 olds vert]

The lip on that rims looks bigger than the factory production lip.

[Go4DaMo]

Oh okay...wouldn't that be sweet to acquire one-off prototype laces!! Most hardcore W-body fanatics, myself included, run the original 245/50 R16 tire size on their x-laces...Brian Spearman, Canasian Matt, etc. Mid-1993, Pontiac began using 225/60 sissy tires.

Breakdown's 1995 had 255/45 Cobras on it when I first met him...they looked sick and I dont know of any complaints he had with rear fenderwell clearance. Even with 225/60s on x-laces, poor rear struts will cause tire damage from the fender's inner lip hitting the tire on bumps. With 245/50s, a bottom-out will damage the rear tires just where the tread meets sidewall.

Also, the 255s are wider, but have a lower profile, so more clearance before impact...