Dunlop DZ03g vs. RE55's

[Rezlo]

Just wondering your guys think of the Dunlop DZ03G's vs the Bridgestone RE55's?

They are the only brands to really carry a good size range in South Africa, I can get Hoosier but they about $700ea for a 280 odd wide 18"

Problem with RE55's is with a 285/30/18 rear there is nothing in similar OD besides the 225/40/18's which I tend to kill in quite a hurry

With the DZ's we have a 295/30 and 265/35 which are very close on OD and arnt to dramaticaly expencive (about $1300 a set)

I run small 13" DZ's on my historic Datsun and they work well, but only ever ran RE55's till now on the more powerful stuff and they seemed to do ok... hope my choise to switch to DZ's on the S14 was a good one.

To add, im going to use the hard compound (our tracks are usualy quite brasive)

[McCoy]

Might help to post up some specs on these tires as I've never seen these model #'s when searching tires in the U.S.

[SoSideways]

I don't think they're tires you can get within the US.

[Rezlo]

Ahh, didnt think that you guys might not have these tires,

Some basic info:
http://www.bridgestone.com.au/tyres/motorsport/RE55s.aspx

http://www.dunloptyres.com.au/TyreDetailAction.do?website=DMS&websegmentcode=MOTORSPORT&mtpcode=82004&from=nPerPage

[Equinox]

I've run RE55S for a couple of years (SR2 compound). Brilliant tires. They will hold their grip all the way down until the tread is completely gone and with as many heat cycles as you care to throw at them (within reason I guess). They are around 1.5 seconds faster round our local track (90 second lap time) than Toyo R888s/Nitto NT01s and seem to last a very long time on light cars like ours. I did around 250 laps of said circuit on a set and only used half of them if that. (Autocross will chew the rears up a lot quicker though I'd imagine)

That said, friends of mine who have used both the RE55S and the DZ03G have found the DZ03G to be a quicker tire. The only real reason a lot of us opt for RE55S are because they are significantly cheaper over here but if you have the cash (or if pricing is similar) I'd go the Dunlops.

[Rezlo]

Hi Equinox,

Thanks, thats what i was hoping to hear.

I was happy with the RE55's grip level on my old S14, but as I say, my main reason for change is tire size's available more than anything. I have set of simmons 18" X 11j rear and 9.5j front, with the RE55's i couldnt find a suitable front.

Lucky for us the DZ03 is only $100-150 more for the full set / 10% more than the RE55's

[Equinox]

For that price I'd jump on it! They're $400 or so more here.

[Def]

Sounds like a big stagger. I've found my car works far far better with the same sized tire all around.

Any reasons for the huge stagger?

[Rezlo]

fitting over a 265 in the front is a mission, and 265 in the rear = wheel spin most of the way down the main straight :)

anything over 450hp requires some good size meat in the rear

[jungle]

See my post here
http://nissanroadracing.com/showpost.php?p=40931&postcount=121

[Def]

fitting over a 265 in the front is a mission, and 265 in the rear = wheel spin most of the way down the main straight :)

anything over 450hp requires some good size meat in the rear

I never noticed any more longitudinal grip from wider tires in the rear, and I've seen quite a few datalogs to prove that as well.

You sure you're running reasonable camber in the rear? 450 HP and R-comps doesn't sound that hard to get to hook up. My car with over 300 rwhp hooks on street tires all the way through 2nd gear, and through most of 1st.

[a_ahmed]

So I take it places like discount tire dont care the dunlop dz03g or the re55s. I looked up the re55s and there is some nexuntire import or something they want bloody 600 for a 295... ****.. each are they mad lol.

However if these are quicker than nt01s id be all over these.. i dont want to jump to a hoosier slick... but anything thats still road legal but faster would make me happier :) I am in need of new tires anyways... its either nt01 or r888 at the moment... nothing else i could find except slower... but if these are quicker yay :) The nt01s have been the best tire ive ever tried personally. Love it...

The FZ-201 also seems interesting.. it looks like a smooth tire based on the video i saw... hmm but i am guessing we also don't have it yet??..... They have three sizes so far they do have 255/40/17 which is what im running now.. would love to try them...

[Rezlo]

I never noticed any more longitudinal grip from wider tires in the rear, and I've seen quite a few datalogs to prove that as well.

You sure you're running reasonable camber in the rear? 450 HP and R-comps doesn't sound that hard to get to hook up. My car with over 300 rwhp hooks on street tires all the way through 2nd gear, and through most of 1st.

Note where I say "over 450hp" there is a very large difference between 300hp and 450hp+ when it comes to straight line traction. :) (I should have noted im talking wheel not flywheel)

With minimal (to get even heating) camber the RE55's were actualy blistering after 5-6 laps, im changing into 4th just under the start line at 130mph, as you can hear, even at 130+ they not very happy http://www.youtube.com/watch?v=gfsK_Yzg3rA

[jungle]

Nice work, 25 sounds tough

[a_ahmed]

man any news on these tires in north america or any other such replacements for the likes of nt01 or r888

[a_ahmed]

Damn it these awesome tires are still not available in north america wtf :(

[icantdrift]

Damn it these awesome tires are still not available in north america wtf :(

It's not likely they ever will be. There are more than a few tires worldwide that never make it to the US market, ESPECIALLY when it concerns high performance product. It's funny because you can often find US spec'd tires in other parts of the world due to US distributors exporting product (usually this is frowned upon by the manufacturers), but it doesn't seem to really work the other way at all.

[eye-5]

I don't know the science behind it but on the Hoosier A6s I would get quite a bit of wheel spin on the 275/17/40s and the 295/17/35s seem to hook up fine. That is at only 300hp to the wheels. This is on a relatively cold tire. (Autocross)

On a road course I run 255s all the way around without issues because there is more time to get the tires up to temp. But with massive amounts of power and it hitting later and more aggressively, I can see where you would need more grip.

[Rezlo]

Eye-5 - the science says no additional longitudinal grip from wider tires in the rear, proven via datalog. This is why dragsters run 205/70/15 tires in the rear jk :p

I noticed the same thing, if its short lower speed stuff the narrow tires heat up fast and work well. If its longer higher speed stuff especialy when you have some power the wider tires will obviously work better. It becomes a balance between how long you need to race for and how much heat you can get into them when running similar compounds. thats why ive been using the DZ03, its more stable over a wider temp range.

Icantdrift & a_ahmed – Don’t cry because of availability, you guys get so many other great brands of race tires at prices way less than what they cost in most of the rest of the world. As an idea, im paying about $1800us for my normal set of 265/295 18” DZ03’s, Hoosiers are about $2300us a set. I would rather run Hoosiers than DZ03's but they just pushing the budget to far

[a_ahmed]

http://forums.corvetteforum.com/c6-z06-discussion/2100526-hoosier-r6-intermediate-grooving-track-street-ultimate-grip.html

Now there's an option.

Apparently pretty common with vette owners and ferrari owners wanting the 'ultimate street tire'. Go figure. Hoosier R6 intermediate compound grooved by kraus racing. Kraus racing apparently makes these for ferrari owners.

Pretty sweet pattern though:

http://i176.photobucket.com/albums/w179/805z06/DSC00919.jpg

http://i176.photobucket.com/albums/w179/805z06/DSC00920.jpg

http://i176.photobucket.com/albums/w179/805z06/DSC00918.jpg

Sexy ccw wheels just a side effect :)

[a_ahmed]

Here's the guy's review after 10 months of driving:

http://forums.corvetteforum.com/c6-z06-discussion/2373725-10-months-on-hoosier-r6-intermediate-grooving.html

[Def]

R6's on the street is stupid. They get horribly slow and unpredictable far far before they wear out when run with full tread on the track. On the street you're talking about a tire that's going to basicaly drop below NT01 speed after a couple trips to the grocery store.

[Matt93SE]

Handful of heat cycles and an r6 is done for if you want speed. If you want bragging rights, then buy away.