I am getting a set of 17x9 Zr1's for my 85 Camaro z28. What size tires can I put on the 17inch rims w/ out throwing of my speedometer? Please help!!

i am pretty sure a 275/40/r17 is the correct size.

Posting your current size would help. As long as you keep your current height, it will not affect your speedo.

I quickly typed up some heights:

205/45/16(23.26)
205/50/16(24.07)

225/45/16(23.97)
225/50/16(24.86)

235/45/16(24.33)
235/50/16(25.25)
245/45/16(24.68)
245/50/16(25.65)*******

255/45/16(25.04)
255/50/16(26.04)

275/45/16(25.74)
275/50/16(26.83)

245/45/17(25.68)*******
245/50/17(26.65)

255/45/17(26.04)
255/50/17(27.04)

275/40/17(25.66)
275/45/17(26.74)
275/50/17(27.83

245/50/16 would be the same height as 245/45/17.

245 * 50 / 2540 * 2 + 16 = 25.65

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1989 IROC-Z 5.7L
NOS 5151 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

[This message has been edited by Omar (edited November 13, 2001).]

I believe I have 215-65-r15 on there now but that is not a stock tire or rim.