very odd ball question about tires

Rottdog · Jul 29th, 2003, 10:09 AM

i just got new cooper cobra gt tires yesterday, its the weirdest thing now my b14 feels slower i don't think its my imagination but it feels really slow for some reason , any ideas ?

Overlooked · Jul 29th, 2003, 10:28 AM

Did you change sizes???

niky · Jul 29th, 2003, 10:35 AM

what size?!? are they balloons?

only reason your car would slow down is if they are under-inflated, or if they have a very high rolling resistance... or it might be some combination of both.

Wont Be Beat · Jul 29th, 2003, 12:08 PM

They could also be heavier.

Rottdog · Jul 29th, 2003, 12:37 PM

205-55-15 i believe thats what i put on either that or 205-50-15

niky · Jul 29th, 2003, 12:53 PM

you've got to try to find a site that has reviewed these tires... if you're coming from smaller ones, the rolling resistance has for sure increased... (ex: from 195/55 to 205/50) ...unless the resistance rating is lower for your tires... i personally have no experience with your brand, so i can't say much about them...

a good example is my potenza grid IIs (some people might not like em' but i do...), they had better compound than my current (cheaper tires with same tread pattern and size, bought on cheap because i had no money)... they ran quieter and faster than my current tires... so if you're coming of better ones, of course your car will feel slower... my .02

Rottdog · Jul 29th, 2003, 06:14 PM

no i'm coming off of f'n snow tires lol , i think it was something else , also i got go back to that f'n place they screwed it up i asked for a static balacing and they did all but 1 tire and now my alignment if f'ed up

psuLemon · Jul 29th, 2003, 06:22 PM

i have nitto 450 extremes.. they seem rather nice..

azkicker0027 · Jul 29th, 2003, 07:31 PM

also check out the tire calculator on b14nissan.org to compare the effects on the speedo as well, i got myself pulled over because i was actually running faster than the speedo gauge........

psuLemon · Jul 29th, 2003, 07:36 PM

i have timed mine with the speedo machines that tell you what you are goin. im goin 3mph less than my speedo and ihave 15"s on with 205/50/15 tires...

BadAhab · Jul 30th, 2003, 02:27 AM

When I got my car it came with 195/65-15 cooper cobras on it. WORST TIRE EVER. These tires are not made for performance at all. They are made for the good old boys and ricers who measure hp in tire smoke. Switched to a Kumho escta 712 in 205/50-15 and have been happier ever day after.

-sean

rkeith · Jul 30th, 2003, 07:46 PM

I miss the past two sets I had (Hankook Ventus, Sumitomos) they were good tires... I have 205/50/15 cheapies on now (not really my choice).... If you could see me now Im wearing my pouty face...