Thomasmoto

OK I've got some added power in our 11 Grand Sport now and we are gonna need some drag radials. What size and offset rim would be best for our combo? I'd like to run as much sidewall drag radial as I can and still clear the brake calipers. It's an A6 tranny with a stock converter. Engine has an Eforce and Kooks headers and hi flo cats. Dynojet said 510 hp and 490 torque. Thanks. David

realcanuk

Buy the Alcoa's listed about 10 threads down from yours and get some 275/45/17 MT's. They seem to work great on setups like yours.

BIGMAC

Nitto makes the NT05-R DR in 345/30/19 that should fit the OEM GS rim and not have any brake clearance or offset issues. Why go to a smaller rim and not use this tire?

algZO6

side wall is your friend.

BIGMAC

Just so I am clear...a 275/45/17 DR is a better choice on a GS than a 345/30/19? More sidewall is that much better than a considerably wider tire? Maybe I better re-think looking for a GS as the platform for my drag car build vs. a "base" car since the ability to run a much wider tire was part of my choice of the GS.

BIGMAC

bump

subfloor@centurytrans

C5 Z06 fronts with 315/35/17 Hoosier drag radials. They'll clear the Grand Sport brakes as long as you have the weights put on the very inside of the rim or on the outside, otherwise they'll come in contact with the caliper. I know this from personal experience as I used them on my Z06 last year.

Here's an example of how well they hook from this past weekend (I'm in the left lane both times)

C5 Pete

Yes...

And the tire size is 275/40/17

Although there are other sizes that work well depending on power output. For the original poster, 275/40/17 will work fine.