487

Anyone know if Nitto NT01 track tires 305/35ZR 18 will work on rear stock wheels, they do not make 295 size, want to try them, I have used my most recent set of Toyo Proxes

Ridin Dirty

305 on a 10"? There are those who will say yes. And those that will say they have done it. But I would not do it.

1. I think its less stable especially on track; just to gain a bit in width isn't worth sacrificing stability.

2. less important....look.....the look these days is a "stretched tire"......that will look the opposite....but it's track so who cares but I just would not do it IMHO

techweenie

The stock rears are 11" - 305/35 will fit, but I believe there could be an issue with rolling radius. I believe you need to match a 305/35 with a taller front - like 235/40...

305/30 is likely closer, but not many manufacturers make that size.

Ridin Dirty

So sorry I thought they were 10s. So 996 twists are all 11s? (I'm in 993 world)

487

Nitto makes 225,235 and 245/40 18s that I could use on fronts, have been running 225 Proxes R888s, any idea which is best if I get the 305s for the rear

powdrhound

I've been running the NT01 305/35/18s for over two years. Probably gone though 10 sets of these already. Vastly superior to the short 315/30/18 size. You will want to pair them with the 245/40/18 NTO1. This will give you rolling radius of 25.55 front and 26.42 rear. Since the rear tire is so much taller then the front, you do NOT want to run this unless you are RWD. I run the 305 on a 12" wheel and it is a square fit. The 305s run very wide. Several guys I know run the 305s on 996GT3s on 11" wheels. So yes, they will work on stock 18x11 twists but it's not optimum as they will be a little pinched. I run the 245s on a 9" wheel. 33F/33R are perfect hot tire pressures with these tires.

487

thanks but still confused, is there a correct combo using the 305s on the rear,stock wheels, on an AWD 04 996tt

powdrhound

No, there is not. You need slightly larger front tires (or same size at the very least) than the rear for the AWD system to have the ability to transfer torque to the front wheels. The rear wheels need to spin slightly faster than the fronts. If you do not have an understanding of how the 996tt AWD system operates, do a simple search. Since the 305s are 26.42" tall, you need that or slightly larger for the fronts. There is no way you'll be able to stuff a tire that tall in the front. Plus, the only option that NT01s come in near that diameter are 275/40/18. No can do...

Simple solution is to rip out the AWD system, install an LSD, and run whatever tire you want. The 996TT awd system is marginal at best anyway.

487

thanks for detailed,although somewhat condescending, reply powdrhound. Probably cheaper to buy a GT2, but I'll just use a different make of tires in standard sizes

powdrhound

Sorry, not trying to be condescending at all. Just trying to help. The AWD system is very limiting on these cars especially since tire choices that will work are very narrow. Just offering options. There are many threads that describe the nuts and bolts of how the awd system operates. It's too time consuming to rehash it all here but suffice to say that due to the nature of the viscous coupler you need the rears to rotate faster than the fronts to transfer any torque. For about $5K you can convert the car to RWD with a proper LSD.

Turbodan

I also disagree with 487. Powderhound was not condescending, just stating facts. Maybe you would rather spend 100k+ on a GT2 but you could go 2 wheel drive for much cheaper.

rmc1148

^+1

James88

Powdrhound always offers good advice, I have vastly benefited from his experiences and advice.

"02996ttx50

+7. its just tough love sometimes lol. the guy is invaluable.

jumper5836

If you do convert to RWD and put in a LSD you''ll also need a tranny cooler because of the additional heat the LSD causes.

I've been running 235/40/18 295/30/18 on stock wheels and 235/40/18 315/30/18 combo on 12" rear wheels. I have no issues with it and AWD. While it doesn't do much, it has saved me when one of my rear tires hit coolant and the tire rear slipped enough to send all 45% of the power it had to the front wheels which helped my car from not spinning out. I keep it because while it may not do much everyday, it's there and will come on and help save me when I least expect it.