RE-11's do not come in a 275/35/19. Are you planning to mount the 275/30/19's? If so, they are much smaller diameter than stock.

IIRC, be careful about your tire size choice with speedo accuracy being one thing. VDC gets flakey if the width difference between the front and rear tire is not within nominal range.

RFC

Good one. I think Acura may be scratching more than their heads after Sebring.

Funny thing is that RFC are my initials...

The rears will be slightly smaller than stock as well. In revolutions per mile the difference between front and rear is 11, with the tires I chose it will be 9, so within range of normal differential. They are primarily going to be used at autocross and track where VDC will be turned off anyway so if it becomes a problem I will mount up the stock tires on some new rims.

Does anyone know if the speedometer takes its reading from the front or rear axle? Wheel speed on the rear will be 1% faster, wheel speed on the front will be about 3% faster. Differential front to rear will be 1.1% overall which is less than the 1.4% of stock, I'll just have to watch out for potential speedometer error.

Which brings us to..."How much speedometer error is there from the factory in a stock 370Z?"

Yeah I'm waiting to find one of those digital speed readouts that the police put out. They usually have one or 2 around town except for the winter.

Mine is actually very accurate. With in 1 mph.

My STi always said I was going much faster than I really was.

Higher or lower?

Got my Bridgestone RE-11's mounted up today, they are super sticky for a "street" tire. They're not even scuffed in yet and I already have more grip than the RE050A's.

Given that the sizes available in 19's are very limited I had to actually go a little larger than would have been normal. 305/30 rear and 275/35 front, they actually fit better than I was expecting. I pulled the camera out to snap some pics but the battery died :(

They have a very stiff outer sidewall and a slightly softer inner sidewall, corner feel is excellent. Haven't taken it to the cornering limit yet as they are too new and a little greasy. Will have more info after a weekend of Auto-X in a week.

Mine looked like it read 1mph lower than the radar sign.

Actually I tested it again yesterday and it was dead even with the radar sign.

Charge-up that camera battery, snap some shots and post please.... I'm really interested to see how well (or otherwise) they tuck under the fender-wells.

Thanks!

Here's some:
Mounted RE-11's

I'll get some outside shots here when it stops raining. As you can see there is plenty of room, but you would be better off with a 10.5 or 11" rim in back.