In the process of changing to 19" front, 20" rear wheels on 05 A4 3.73 w/ 2800 converter. I was getting fantastic acceleration with stock wheel size.

How will increasing wheel size affect pull? I guess I'll find out, just wanted some explanations from other members.

 

If they're heavier (either the wheels, the tires or maybe even both) then the car could feel (and actually BE) slower.
But if the new tires happen to also be stickier/grippier in a straight line then that could counter the extra weight as well.
Either way you're going to be quicker with those gears and that converter in there.

 

 

Heavy wheels will certainly slow you down some.

 

Unless your diameter/circumference changes which effectively changes the final drive ratio.

 

Bigger rims move the wt further away from the hud center. Takes more energy to rotate bigger and heaver rims. so YES you will feel a difference.

If you want to go quicker go smaller, 18" or 17" all around rims.

each pound of rotating wt ( unsprong wt ) is approximately 6 1/2 pounds of regular wt.

 

Which is why when you go to an after market wheel like, ForgeLine so much time is spent on concentrating the weight to the center of the wheel as you can. If you want to go bigger and increase performance at the same time look for a company that can build the wheel using light weight hoops with a strong center so that if you do go bigger you will keep the weight down as much as possible.

To answer the question, yes increasing wheel weight will make the car slower to respond and will take more HP to turn.

 

Thanks.

Rims and new tires are significantly less weight from the old C6 OEM wheels and GY runflats. The new tires are 1.5" wider and waaaay more sticky. That's not what I was worried about.

I've had the 3.73 gears and the converter for 6 months and am loving the fast pull.

What I am concerned with is if the larger diameter of the new wheels/tires will lessen this pull. Will I loose the "sense of power?"

The wheels are CCW.

 

With before and after tire diameter it is fairly easy to do the math, scaling your senses is another matter.

 

Anyone know the weight of:

18" front OEM 2005 C6 polished w/ GY runflat?

19" rear OEM 2005 C6 polished w/ GY runflat?

 

Lower profile tires also add some more hardness to the ride.

 

I have a little play time with wheel/tire weights.......

My consolidated list of my personal stock
Wheel size,type, & weight in lbs ea
OEM MAG 17 x 8.5, 17.5
OEM MAG 18 x 9.5, 19.5
OEM MAG 18 x 9.5 w/ new Yoko 295/35-18 AVS sport non-runflats, 50
OEM MAG 18 x 8.5 w/ new Yoko 275/35-18 AVS sport non-runflats, 46

PWO 5 spoke Y2K repos 17 x 8.5 +58mm, 20
PWO 5 spoke Y2K repos 18 x 9.5 +65mm, 23
HRE 18 x 9.5 545 w/ clear center +58mm, 22
HRE 18 x 12 545 w/ clear center +74mm, 27

PWO 17 x 8.5 +58mm w/ oem runflat 245/45/17 (8/32 tread), 50
PWO 17 X 8.5 +58mm w/ new MT ET Street 26 x 11.50 x 17 with TPS & lots of weights, 45
OEM MAG 17 x 8.5 w/ NITTO 555 275/40/17 (1/2 tread), 45
OEM MAG 18 x 9.5 w/ stock OEM 275/40/18 runflats, 53
OEM MAG 17 x 8.5 w/ stock OEM 245/45/17 runflats, 47
OEM MAG 17 x 8.5 w/ new MT ET Street Radial 275/40/17, 47
OEM MAG 18 x 9.5 w/ new Hoosier R3S05 275/35/18 road race radial 4.5 32nds tread with std valve stems 42

CCW drag pack rear 16 x 10 classic full polished with well worn MT ET Street 26 x 11.50 x 16 (1/32 tread) with center cap, 34

CCW drag pack rear 16 x 10 classic full polished with 1/2 worn MT ET Street 26 x 11.50 x 16 (3/32” tread) with center caps, 38


CCW drag pack front 16 x 5 classic full polished with like new Firestone deluxe champion 5.00/5.25-16 (10/32 tread) with center cap, 33

OEM runflat 275/40/18 worn to wear bars, 29
Bridegstone expedia S-01 345/35/18 (9/32 tread), 37
New MT ET Street Radial 275/40/17 (6/32 tread), 30
New MT ET Street 26 x 11.50 x 17 tires (6/32 tread), 25
MT ET Street 26 x 11.50 x 16 tires worn out (1/32” tread) 15.75
MT ET Street 26 x 11.50 x 16 tires (3/32” tread) 18
OEM runflat 245/45/17 (8/32 tread), 29
BFG G-force drag radial 345/30/18 new, 30
BFG G-force drag radial 345/30/18 1/32nd, 29.5
BFG KDW2 295/35/19 new, 32
Yoko 295/35-19 AVS sport non-runflats (2/32 tread), 29
Toyo Proxes RA1 335/30ZR18, new, (8/32 tread in the middle & 6/32 outside edges), 33.2

Topline 5 spoke Y2K repos 18 x 10.5 +58mm offset rims w/ new 275/35/18 BFG G-force TA drag radial, 53

Bob' House of Wheels 18 x 10.5 Chrome Y2K repos widened to 18 x 12. Work was done by Weldcraft Wheels.+56mm (with the 1.5" strip inserted, they should be right at 9.375" backspace, 31

HRE 18 x 12 545 w/ 345/30/18 BFG DRS, 57
HRE 18 x 9.5 545 w/ clear center +58mm w/ new 275/35/18 BFG KDWs, 52
HRE 18 X 9.5" 545 full polished w/ Yoko 265/35-18 AVS sport non-runflats (8/32 tread), 50
HRE 18 x 12 545 w/ 345/35/18 EXPEDIA S-O1 (9/32 tread), 64
HRE 19 X 10" 545 w/ Yoko 295/35-19 AVS sport non-runflats (5/32 tread), 58
HRE 19 X 10" 545 w/ new BFG KDW2 295/35-19 (10/32 tread), 61
HRE 18 x 12 545 w/new Toyo Proxes RA1 335/30ZR18 & TPS, 58.4 lbs

My best 60' times on my 97'
New MT ET Street Radial 275/40/17 on C5 OEM 17 x 8.5 Magnesium wheels = 1.47 60'
Worn out 26 x 11.50 x 16" Mt ET Street on a 16 x 10 CCW drag pack = 1.51 60'
New 26 x 11.50 x 17" Mt ET Street on an PWO Y2K 5 spoke 17 x 8.5 = 1.53 60'
1/2 worn (3/32” tread) 26 x 11.50 x 16" Mt ET Street on a 16 x 10 CCW drag pack = 1.53 60'
1/2 worn 345/30/18 bfg dr on HRE 545 18 x 12 wheel = 1.49 60'
I have over 300 passes on these set-ups together and at different tracks and logged lots of data....

With the above said........you can feel the car lift & take off a lot quicker with 10lb or more each lighter wheel/tires on the front
Put on the CCW drag pack fronts and its night and day