You shouldn't feel a power loss unless you MASSIVELY downgraded the overall size of the wheel and tire. The circumference matters. The wheels are not your problem. I'm not too keen on B6's and what problems they may have, someone else will chime in about that.

 

Whenever you up the weight of any moving part you hurt performance greatly. 19" TSWs are heavy cast wheels and are most likely the problem.

 

Power loss can be common with much larger wheels. Although the diameter ends up being the same.... the weight you are moving around is typically higher.

Dubman6, try this... weigh your 16s and then weigh your 19s....

 

Not only that, but it could also be the width causing drag due to a wider contact patch and/or higher rolling resistance.

If the original tires were 205mm wide (for example) and had a tread wear rating of 400, they are going to be a fairly low rolling resistance tire (comparitively speaking, of course).

But when you "upgrade" to some 235mm tires with a tread wear rating of 280, they are going to be a stickier tire so they are going to hold the road more (with a wider contact patch) thereby creating more drag.

But yes, as mentioned a larger and wider wheel typically weighs considerably more, which increases the rotating unsprung mass. Which will increase braking distance and decrease acceleration.

 

sounds like a good excuse for a chip.

 

Thats exactly what i was thinkin...cant wait..i might go GIAC but im still clingin to REVO...idk at the moment. But next on my list is a intake and forge dv spacer and then the chip cuz at FixxFest sponsors like GIAC and Revo show up amd have bogos and half off deals like that and stuff..its in November so i can wait till then. But anyways i really appreciate all u guys help and responses. Im def gonna weigh the rims..thats aroused my curiosity. Thanks again.

 

Physics guys! Since the wheel is a much larger diameter, it take more force to spin the wheels, especially with more weight on the outside.

 

Correct, but possibly not applicable! While there is more weight to 19's, the overall diameter of the wheel + tire should be relatively the same. Could 33%, like the OP said, of the lost power be attributed to that?? :crazy:

 

That's why i bought 20's ...... to keep me nice and slow ....no more speeding tickets over here

 

hehe :thumbup: good tactis, I need to think about that too, cause local Police bought 50 laser pistols and received new GOLFs V TDI + Audis S4 - Damn :thumbdown .... :driving:

 

I've put bigger wheels on everything i've owned and unless you go w/ an extremely light oversized wheel you will definitely notice a difference off the line. You are having to start heavier wheels moving. However once moving the power difference shouldn't be as noticeable. I don't think this has anything to do w/ being a b6. A b5 is gonna do the same thing or any other brand of car. Your solution is either pay the big money for lightweight wheels or throw in a chip or do both.:wrench: I'm running 19's on an 06 2.0t m/t and I don't notice any major "power loss" but it may be a little slower off the line. APR stage 1 chip planned. :thumbup:

 

It really comes down to the moment of inertia. Back in the old days of upgrading OEM steel wheels with larger aluminum wheels, the new wheels would weigh so much less (less unsprung wieght), other differences didn't matter. However, going from nice modern 16" wheels to 19" wheels (plus tire), there's likely a moderate weight gain. But that's not nearly as bad as increasing the moment of inertia with the bulk of the weight further out from the center. That's what is going to slow you down. The more mass on the outer edge of the radius, the harder it is to get it spinning.

If the outside circumference is larger, you'll be losing acceleration because you're basically running a different gear ratio.

Hope this makes sense - it's still early on a Saturday without enough coffee.

 

Ya i guess it would have made since to mention that i was basically saying it lost a good amount of power off the line. As far as rolling acceleration it has decreased a little but the soon to be chipped B6 pushing 315lbs/tq will be sure to fix all that I cant beleive i couldnt figure this out on my own. I think i want some CF wheels..those would look sweet!:thumbup:

 

guys. there are two sides as for all the coins. sure, lighter wheel is easier to wind up. however, if lightness is due to narrower tyre, consider the fact that contact area is also adequately smaller - this means, that if you have car powerful enough, it will not use the power properly - it will either burn your rubber, or jerk via TCS (ESP). so, wider tyres are much better of for quick acceleration. I have 235s and even they are being burned when one quickly makes it up. sure, if you go for non turbo 2.0, you would get some discomfort but those with 2.0T or other T's - wider tyres is just way to go.

 

Its a combination of ALL posts above..:

Heavier wheel/tire combo
Wider contact patch
Stickier tire
Weight distribution change (when force is being exerted on the center longer radius = more force needed to generate equal torque, right!?)

OEM 16s are pretty light, the steel wheels are even lighter I weighted one steel wheel at 16.5lbs!! compared to 32lbs on some 19's. expect a difference at the gas udes/month as well .

 

dubman, your B6 is lookin' so good with those TSWs...you are better to go slow so folks can take a good look. :thumbup:

"They see me rollin'...they hatin'..." :lol:

 

Hahhaha..i ride slow now that ive got wheels. And im stayin stock height cuz with ppl in the back im rubbin. I always have ppl in my car. I enjoy riding alone, but i want ppl with me most of the time. On top of that my stock setup has pretty much settled all the way down and these TSWs tuck rite up in there. Im plannin a photoshoot with my buds, of an A4, GLI, and 5 series. So ill post em up when its complete. I appreciate all the love and props i get on my ride...i appreciate it ladies and gentlemen. I hope to be that one B6 that wins POTM u kno? ..i havent seen one yet. Im gettin her tinted 2mro, and ill post pics of that too.:thumbup:

 

Ill bet stock 16's weigh about 40 LBS per wheel and 19's well over 50 LBS per wheel. My 18'' RS6's weight around 50 LBS.