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  1. Maryland Sold: Set of 4: Like NEW 18x8.5 Konig Ultragrams + 245/40ZR18 Continental Extremecontact Sport02s - $1200

    Purchased new from Tire Rack Feb 2024; only run in spring and summer last year and from March to July of this year. Less than 5000 miles on the set (my 23 Civic Si has only 10,900 miles on it). Wheels are perfect - no rash, no scratches, no blemishes. These were installed with stock suspension...

  2. 2023 Civic Si Spring Rates, Motion Ratio, Ride Frequencies, Autocross

    That is really useful info, and very much appreciated! I'm looking at tires and wheels now. Just have to decide if I stick with 18 x 8 wheels as I can get a slightly wider 245/35 tires on the stock wheel size while staying within the +/- 1" of OE street class rule. Or perhaps I throw caution to...

  3. 2023 Civic Si Spring Rates, Motion Ratio, Ride Frequencies, Autocross

    This thread is relevant to my interests! Just picked up my 23 Si back in May and have run it in my first autocross events ever over the summer - the second was just this past Saturday at Summit Point in WV. My performance on Saturday was, to say the least, disappointing. Last in street class...




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