Quote:
Originally Posted by AriuSen
So, I have done a extensive research on why people would track with the 18s, and mainly what I heard from people is because of bbk clearance and because tire companies dont provide 17" tires in 35 for their size.
This weekend I tried his 17x9.5 et 35 on my car and they clearly clear my bbk (PFC). I am not sure the size of my bbk, but it also clears my friends bbk (brembos)
Running 17s, will save me $200.00 per set!!! that is amazing!
Also, I would like to verify this information. running with 17x9.5 with 275/35/17, my gears will be shorter....I would be shifting fast which is a good thing!
Lastly look at the sheet I made....you can save 20lbs of UNSPRUNG weight.....that is a lot of weight to consider if you go with 255/40/17. Note that by going 255 compared to 275, the difference in width is very small. is 10.5 vs 10.8
So before I make the purchase, I would like to know from you guys....should I go with 275/35/17 or 255/40/17 ?
Advantage of going 255/40/17 is to save 20lbs of unsprung weight.
advantage of going 275/35/17 is to save only 8lbs of unsprung weight, but gears will be shorter (not sure this is true)
The HACK could maybe confirm?
Btw, if I go 275/35/17, I will have no issue with clearance as it will sit lower than my spring perch.
update: my friend told me, that by going 17 my speedometer will be off by 5%? I dont really actually care, as I dont really look at my speedometer at the track.
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If you ran 275/40/17 that would maintain the "correct" aspect ratio on the tire. The rule is when you go down one rim size you go up one sidewall size if width remains the same to keep as close to the right ratio as possible.