RE: Need Help once a gain in the tire ilse

From: Jason Jennings (jason@spray-tech.com)
Date: Wed Feb 03 1999 - 10:53:39 EST


thanks....yeah I kinda just wanted to bump up the overall dia just a
tad... Maybe a 3.90 effective ratio or something, nothing too drastic
at first.... It is just a tough call when you are first starting out
and the mods come in slow....

Jason
2/3/99 10:57 AM

        -----Original Message-----
        From: Bob Tom [SMTP:tigers@bserv.com]
        Sent: Wednesday, February 03, 1999 5:21 AM
        To: dakota-truck@buffnet.net
        Subject: Re: DML: Need Help once a gain in the tire ilse

        Jason

        My Dakota has 3.55 and came with stock P215/75R15 tires.
        Using the DML Wheel and Tire calculator, the P215/75R15
        has approximately a section width of 8.46", a sidewall height
        of 6.35", overall height of 27.7" and circumference of 87.01".

        At the moment, I am planning on running BFG drag radials,
        either P235/60R15 or P275/60R15, on 15x8 rims.

        The P275/60R15 has a section width of 10.83", a sidewall
        height of 6.5", overall height of 27.99" and circumference of
        87.94". This would give me an effective gear ratio of 3:51.
        TireRack's price is $140 each.

        The P235/60R15 has a section width of 9.25", a sidewall
        height of 5.55", overall height of 26.1" and circumference of
        82". Effective gear ratio would be 3:77. TireRack's price
        is $135 each.

        My personal decision will depend a combination of factors:
        estimated hp and torque after I have completed my mods, the
        traction factor and rear wheel clearance.

        One thing, for sure, ... you will need at least 8" rims.

        The calculator can be found at:

http://www.cs.fredonia.edu/~stei0302/WWW/DAKOTA/TIRECALC/tirecalc.html

        Good luck.
        Bob
        Burlington, Ontario

        '97 CC Sport, 5.2L, 3.55 auto., flame red
          Gibson duals, KN drop-in
          Coloured-keyed grille guard, running boards
              and hard tonneau cover
          Deflectors, grille insert
          AR-211 15x7 rims (4.75" backspace)



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