TRACK: 17's vs. 18's
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#4
Join Date: Oct 2004
Location: Arcadia, CA
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I was leaning towards 17's, but I see most people running 18's. I'm on OEM Brembos, and don't want to get anything bigger, these will fit under 17's...
#6
Assuming you are gearing for a circuit type of course then....
Go with 18's instead.
On tarmac it is best to get a good stiff sidewall tires or low profile tires that does not flex as much (hence the "feel" of the car).
17's with low profile tires would be great for the track because of the weight advantage and also shortening the the rolling diameter will increase acceleration out of turns but note that since your rolling diameter is shorter it means your wheels are spinning more but going the same distance which translate to you seeing your speedo saying 60 mph but you might just be going 54 mph. If you are a true track junkie or have another wheel/tire combo for daily driving then 17's would be great otherwise I would just stick with 18's. Plus with 18's you always have an option of going with bigger brakes a BIG necessity if you track your car often and if you wanna turn heads
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Yes, I was talking about road course. I already have daily rims, so these would be dedicated track rims. I really have found the OEM Brembos to be more than enough for what I need on the track. I think most of those other ones do have bigger disc, but contact area is not much bigger... I have upgraded pads, rotors, lines and fluid and have yet to feel the need for more. So all in all, I think I'm still leaning toward the 17's
Thanks for all your input guys! If anyone else has anything to say, please chime in!
Thanks for all your input guys! If anyone else has anything to say, please chime in!
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#8
#9
A typical, and what I think is perfect for the average road courser, is four 17x9 or 17x9.5" wheels with 275/40 rubber on them. There is nothing wobbly about it. This way you can maximize tire life by having full rotation, have good tire selection, and cheaper tires than 18s.
One can do the same thing with 18s, but you will pay more across the board for it (more per wheel, more per tire, more per dismount/mount/balance, etc.)
#11
#12
This would be the only reason to do it. Keeping a height stagger would be more beneficial IMO. Going like 275/35/17 and 275/40/17. This will prevent weight shift to the rear of the vehicle which could mess with handling dynamics
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I was thinking 245/45/17 and 275/40/17? They have almost identical specs.
245/45/17:
sidewall: 4.3"
radius: 12.8"
diameter: 25.7"
circumf: 80.7"
revs/mi: 785.0
275/40/17:
sidewall: 4.3"
radius: 12.8"
diameter: 25.7"
circumf: 80.6"
revs/mi: 786.0
245/45/17:
sidewall: 4.3"
radius: 12.8"
diameter: 25.7"
circumf: 80.7"
revs/mi: 785.0
275/40/17:
sidewall: 4.3"
radius: 12.8"
diameter: 25.7"
circumf: 80.6"
revs/mi: 786.0
Last edited by GReddySetGO; 04-04-2009 at 01:54 PM.