Results 1 to 5 of 5

Thread: 2nd gen legacy speed calibration

  1. #1

    2nd gen legacy speed calibration

    hey guys i want to move from 14 inch rims to 15 or 16 inch rims. my tire calculators all get sort of close when trying to calculate a close to stock combo replacement, but theyre still off and i wanted to know how you guys calibrate your speedo/odometers. The closest thing to my 185/70-14 was 305/30-17 and 225/35-18, next closest is 245/40-16.5 or 195/50-16.5. I want to get 15s or 16 and those are a lot less close in size. my only problem keeping me from the switch is the speedo/odo calibration. im not sure i understand what ive been reading but it seems like i need a gear in my cluster. Can someone whos had experience with changing wheel sizes walk me through the experience?

  2. #2
    New User
    Join Date
    Jul 2015
    Posts
    12
    Points
    1,159
    Level
    18
    Points: 1,159, Level: 18
    Level completed: 59%, Points required for next Level: 41
    Achievements:
    1 year registered1000 Experience Points
    alternatively, whats a middle of the road 14inch rim? i want it to be a daily driver and/or light autocross rim? i dont want replicas and can shell out a bit more for quality. but want to keep it about 150 a wheel if possible.

  3. #3
    SLi Lurker Go Mifune's Avatar
    Join Date
    Aug 2014
    Location
    Evergreen Colorado
    Posts
    331
    Points
    3,924
    Level
    39
    Points: 3,924, Level: 39
    Level completed: 83%, Points required for next Level: 26
    Achievements:
    1 year registered1000 Experience Points
    First, you might want to upgrade your brakes-most of us do- and then you'll need at least 16" wheels to clear the calipers.
    Second, there's almost no autocross type of tire available in 14" or 15" for our cars.
    If you go slightly too tall in a tire, the RPMs will drop on the highway which some like but acceleration will suffer a bit and your car will be taller.
    Slightly too short gives you higher RPMs, a wee better acceleration and a shorter car.
    Check out the Members Ride I section to see what others are running for tires.
    Otherwise most people don't seem to care if the speedo is off by 2 to 4%.

    I've run both shorter and taller tires without complaint. Too wide is more concerning and then you get into fender rolling and flares.

    Here's a great post on tires-
    https://sl-i.net/FORUM/showthread.ph...ithout-rubbing

    And lots of info here-
    http://www.tirerack.com/content/tire.../homepage.html

    This might help-
    http://www.willtheyfit.com/index.php...&Submit=Submit

    And for reasonably priced but good wheels-
    http://forums.nasioc.com/forums/show....php?t=2239019

    For great aftermarket wheels, lots of cash seems to be important.
    1996 Outback 5 speed
    1997 Legacy L wagon 5 speed Member's Ride I thread

    "You want a real kick? You go Bernoulli." Pops Racer

  4. #4
    New User
    Join Date
    Jul 2015
    Posts
    12
    Points
    1,159
    Level
    18
    Points: 1,159, Level: 18
    Level completed: 59%, Points required for next Level: 41
    Achievements:
    1 year registered1000 Experience Points
    Thank you so much for the info!

  5. #5
    Administrator rkrenicki's Avatar
    Join Date
    Jun 2009
    Location
    Northeastern CT
    Posts
    2,652
    Points
    23,967
    Level
    94
    Points: 23,967, Level: 94
    Level completed: 62%, Points required for next Level: 383
    Achievements:
    10000 Experience PointsO.G.SocialOverdrive
    I would say, stick with stock legacy sizes. 205/50R16 (-0.5% error) or 215/45R17 (+1.7% error). They are both "close enough" that you dont have to worry about your speedometer, as the general margin for error in the speedo itself is larger than either. 16" and 17" wheels will be very easy to find with the correct specs as well.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •