Recommended track day tire size?
I'm looking for tires for my dedicated track day Boxster. They need to be street-legal. I'm using 17" boxster s rims and will go for 255 rears. What would you go for up front? 235? Will I be able to run 235 on a staggered set of boxster s rims?
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I think the spec boxster guys run 235/40/17 up front on the stock 7x17 wheels, and 255/40/17 on the stock 8.5x17 wheels. I like to run 225/45/17 on the front OEM wheels and 255/40/17 on the stock back sizes.
For tires, I am like a broken record, I like the hankook R-S3, 200 TW tire, good on track and lasts a long time. I have a trailer and sometimes drive my street tires to/from the track but I have got lazy and now bring them as spares and leave them on the trailer and drive on the R-S3 all the time :) If this is a dedicated track only Boxster, and is only driven to/from the track, there are lots of good 200 TW tires, Bridgestone RE-71R, BFGoodrich Rival-S, Advan, etc. Then there are some street legal 100TW tires like Toyo R888 and Nitto NT-01. What all can you get in Norway? |
I can get most makes if I order in advance, but since I'm hoping to get them by Saturday my options will be limited by what is in stock. I was thinking more in terms of 100TW tires, but this may be too much for the street? It rains a lot over here, and I need to cross mountains on the 8h drive to and from the track.
I'm running PSS9s with SPEC racing springs. I have -2.5 camber front and -2. rear. I ran AD08Rs on the Clio RS and liked them. I have not tried anything more track focussed. My mates are running Federal 595RS-R but they complain about what wet grip. The AD08Rs are good on a wet road, but may be a little tame on track. I need to be able to use the tires also on a wet track. Are the 100TW tires capable of building heat and sticking on a wet track? |
I don't have experience on that, I am new to the 100TW tires. I have a set of Toyo R888 that came with my trailer but I have only run them in the dry, and they are pretty worn down anyway.
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In my experience, I'd say that the Toyo RA-1 is probably the best all-around tire for both wet and dry track racing. This tire is good in the rain but will likely be a little slower in the dry than a Toyo R888 or NT-01.
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That is valuable information. Thank you.
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One more thing - be a little careful on a brand new set of RA-1's with full tread depth in the dry; they can feel loose until they scrub in and get some wear on them.
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I ended up with a set of Federal 595rs-rr in 225 and 255. I'm hoping I've made a good choice, but I had to go with what was available and within my budget.
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You also probably can not put 235 wide tires on a 7" wheel, you need at min 7.5". 225's fit a 7" fine
YMMV |
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Could Tire Rack be wrong :confused: |
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YMMV |
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At the OP.....can out get Nankang NS2R in Norway. Readily available in Europe.
They do 180, 120 and 180tw. I have the 180 'street' compound and are fine on the road |
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I ended up getting a set of Federal 595rs-rr. So far I'm pleasantly surprised, especially in the wet on the street. When new you can definitely lean on them as long as there is not too much standing water.
I would not put 235s on a 7J rim. The 225s I have now are already wide for the rim. I have a bit of experimenting to do With tyre pressures before I can say anything definitive about the grip though. After some initial trial and error I cut 2 Seconds off my previous best of 1.50. howevwe, I'm still not consistent enough to be able to tell what is Down to the tyres and what is me improving. |
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Nevertheless, this is the spec size for the 17x7 front rim in Spec Boxster, and it seemed to work fine. Toyo doesn't make a narrower tire for 17" rims. Of course, now most people have moved to the square setup--255/40-17 on 17x8.5 all around, which does meet Toyo's requirements. |
For Autocross, I'm debating 17" or 18" Rims with RE-71R (225/255 and 225 or 235/265) respectively. I've got rims for either.
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