You assume too much without proper evidence. I'll just wait until someone officially weighs them in comparison to the other wheels.

You're getting much wider tires which has alot more advantages then disadvantages. Not sure why people are complaining about that.

 

I second that.

 

yeah, the sport rims could be just as heavy as the stock rims : )


and no one is complaining, I was simply (and very obviously) just commenting on the fact I think 44lbs is an underrating looking at the upgrades in the sport package.

 

Going to the Tirerack website and looking at the tire specs, I find that the 19" Sport package 245/40 and 275/35 X 19 Bridgestone RE050A tires weigh in at 30 pounds each.

The 225/50 X 18 size Advan tires the 370 uses are not listed, but the 245/45 tires are and they weigh in at 26 pounds each. I assume the 225/50 would weigh in at 26 pounds also.

Nissan literature handed out at the La Auto show states the forged alloy wheels are 6 pounds lighter each.

Given these numbers, 6 pounds lighter wheels each with tires that are only 4 pounds heavier each makes the tire and wheel package come in at ~ 8 pounds lighter for the set of 4.

This implies the added weight is in the brakes, spoilers, Syncroshift system and LSD.

See picture below for added position sensor hardware on gearbox for Syncroshift

 

Given these numbers, 6 pounds lighter wheels each with tires that are only 4 pounds heavier each makes the tire and wheel package come in at ~ 8 pounds lighter for the set of 4.


You got that all wrong man...its 6 pounds lighter wersus the forged 18/19inch 2008 350z nismo ....

 

That seems even more unlikely.

 

I know it does and I agree, but all the literature that comments on the "6 pound weight decrease per wheel", it's in relation to the old 350Z... so it's pretty impressive. It's NOT compared to the base 370Z 18" wheels...

Since nobody seems to be able to read official press releases from Nissan, here's a quote from the Nov 19 release:

"Since so many aspects of a sports car’s performance come down to the simple
formulation of power-to-weight, the engineering teams behind the development of
the new 370Z made that their priority focus. On the weight reduction side of the
equation, they put the new Z® on an extremely restrictive diet. Beyond just the
pounds shed with the body-in-white, every component throughout the vehicle was
scrutinized. For example, fuel tank weight was reduced by 13.9 pounds, the exhaust
system by 3.8 pounds, the audio system by 3.5 pounds and the 19-inch wheels by
approximately seven pounds each for the fronts and six pounds for the rears – an
estimated 225 pounds total."

 

Does Akebono make the big brakes on the sport package? Interesting, I'm gonna go research this. If you have any sources/links can you post them? thanks

 

It's all marketing. Nissan is playing it from the angle that if you compare individual pieces from the 350z vs. 370z everything is lighter. The problem is that while individual pieces are lighter than before the 370z has some added things that the 350z doesn't have. So while individual things are lighter the whole car still weights more than the 350z. I think Nissan played up the angle of lighter weight to get more hype behind it. It's still very impressive what they accomplished but at the same time every year that goes by new things are added to cars which make them heavier. I mean I'm sure if they built the Z to standards from 10 years ago while still using these light weight techniques we would have a very light car but crash tests requirments and amenities are whats adding weight to our sports cars. Personally I'd like to start seeing sports cars come with an optional ture base model. No frills, no power this and that, just the basics.

 

I am pretty sure they are comparing the standard 18 inch cast wheels to the new sport 19 inch forged wheels and not the Nismo's rims. cutting that much weight from an already forged rim with a very similar design is absurd.

 

Something not adding up here, didnt' the 18/19 Nismo forged wheels from last year weigh about 20-21 pounds each?

This would imply that the 370's forged wheels weigh in at 14 to 15 pounds, and they are 19" in front...I don't buy they are that much lighter since they would be the lightest aluminum 19 X 9 and 19 X 10" wheels on the planet in that case.

 

thank god someone understands.

Ray's top of the line Volks weight in around 20 lbs for comparable sizes in the TE37 (since I owned them and can reference them, RE30 and CE28 are both slightly lighter... slightly). it is not possible to shave that much weight from a forged wheel.

 

Do we go to speed shops and weight our cars? Like the trucks, they have weight stations on the highway.

 

How much did the 350z weigh? They said that the 370z chassis would be 200lbs lighter than the 350z and that the hood, hatch, and doors would be made of aluminum. That's got to make a difference.

 

I doubt it's the Nismos... it's probably the similar-level sport package wheels. You're not going to get a 15 pound 19" wheel on a factory $30K car.

 

More and more I don't understand why you guys are not happy with the 370z

You are getting 370z with 350z Nismo performance only better at 6 or 7 thousand dollars less and much better interior and technologies.

 

I meant the Nismo model 350Z's wheels which are 18 X 9" and 19 X 10" and I had to guess the weight of, not the Nismo aftermarket 19" wheels which we do know the weight of since it is in the Nismo catalog. The Nismo 19 X 8.5" wheel= 20.5 pounds and the Nismo 19 X 9.5" wheel = 20.9 pounds.

All made by Ray's and they would have to be forged magnesium to save 6 pounds and like you say, you are not getting those on anything short of a Porsche Carrera GT...

 

You are way behind the 8ball if you are not sure whats going on with the weight between the 350z vs 370z. Yes parts of the car are lighter but the car as a whole is heavy. The previous 350z's came in at 3200-3300lbs depending on model. These new 370z's start at ~3300lbs for the base and only go up for added packages or trim. The chasis may very well be 200lbs lighter and there definetly are aluminum pieces but as with every new car more safety crap is added as well as new gadgets. So dispite Nissan cutting weight in lots of different places they also added components to the 370z that the previous 350z didn't have, thus making it not lighter than the 350z.

 

Actual scale data collected to date.

Sportscar............................Base= 3314
Road&Track..............Base w Sport= 3373
Edmunds..................Base w Sport= 3359

The variation in scale data like this is most likely due to fuel load differences.Road&Track stated a full tank.
Appears the 370Z is not a light weight.

 

I am interested to see what this car is going to feel like with the shorter wheel base and shifted weight balance.