Quantcast
School me on running different diameter tires than stock - Beyond.ca - Car Forums
Results 1 to 9 of 9

Thread: School me on running different diameter tires than stock

  1. #1
    Join Date
    Jul 2010
    Location
    Homeless
    My Ride
    Blue Dabadee
    Posts
    9,593
    Rep Power
    100

    Default School me on running different diameter tires than stock

    So this is me showing my clueless side but how much does it matter if you deviate from OEM tire diameters?

    In this case I am talking about going less wide than stock but keeping rim diameter the same. How far can you safely/mechanically go before it will cause issues.

    I just genuinely have no idea what is ok and what is not in this regard and google hasn't been enormously helpful so far.

    Any rule of thumbs on % difference to stick to?

    This would be on a modern car with electronics up to wazoo so need to make sure it doesn't fuck with any wheel speed sensors too much either.

    TIA
    Originally posted by Thales of Miletus

    If you think I have been trying to present myself as intellectually superior, then you truly are a dimwit.
    Originally posted by Toma
    fact.
    Quote Originally Posted by Yolobimmer View Post
    This quote is hidden because you are ignoring this member. Show Quote

    guessing who I might be, psychologizing me with your non existent degree.

  2. #2
    Join Date
    Jan 2004
    Location
    Calgarian Living in Edmonton
    My Ride
    93 240sx SE, 17 Infiniti Q50S, 2008 Highlander
    Posts
    6,681
    Rep Power
    35

    Default

    The rule is to stick to max of 3% or under is best. Anymore you risk catastrophic failure LOL or its the speedo is out of whack


    Thats from what I've been told working in Parts to go by at any brand Ive worked at.



    Go on a tire calculator, like 1010 tires, throw in your OEM sizing and then play around with size and calculate. Stay 3% or under. I'm sure you can find stuff less wide but same overall diameter.
    Originally posted by GTS Jeff
    You know those bored stay at home moms who's entire lives revolve around driving their kids to soccer, various cleaning accessories, and worrying about neighbourhood rapists? The kind of people that watch the View and go "uh huh..." Those unfulfilled people who try to fill the void in their empty lives by writing whiny letters to the editor complaining about shit that no one really cares about?

    Well imagine if instead of writing that letter to the editor, she just posts on a car forum for car enthusiasts. That's Kritafo.

  3. #3
    Join Date
    Jul 2010
    Location
    Homeless
    My Ride
    Blue Dabadee
    Posts
    9,593
    Rep Power
    100

    Default

    I have been finding some stuff at just under 2% smaller, wasn't sure if that was a lot or not . Would actually make things square with the OE fronts which seems like an ok compromise.

    I will keep digging around. 1010 keeps crashing on me today which is frustrating.
    Originally posted by Thales of Miletus

    If you think I have been trying to present myself as intellectually superior, then you truly are a dimwit.
    Originally posted by Toma
    fact.
    Quote Originally Posted by Yolobimmer View Post
    This quote is hidden because you are ignoring this member. Show Quote

    guessing who I might be, psychologizing me with your non existent degree.

  4. #4
    Join Date
    Sep 2007
    Location
    Calgary, AB
    My Ride
    A vehicle or two
    Posts
    4,436
    Rep Power
    32

    Default

    There is lots of stuff to consider. Wheel well gap/clearance, speedo, look, handling differences, power decreases, ride height, weight, wheel rub on suspension components, etc.

    If your vehicle is AWD, you also need to ensure all 4 tires are the same rolling diameter. (Or as close as possible to it).

    Otherwise, despite all the things already mentioned, it really isn't a big deal to go to a different diameter. If you are a FWD or RWD vehicle and nothing is rubbing, then you are good to go. But if you aren't at least close in the diameter, then you are subject to some sort of trade-off.

    As far as sensors and electronics go, I don't believe it is a big issue as long as you keep the same size all around. Unless there is another sensor in the tranny or something that conflicts with the data the wheel sensors are giving, I don't see it as an issue. Heck, I've run tires FAR bigger than stock on my Jeeps without any issues to speak of except for noticeably worse fuel economy.

    If you are going with a narrower tire but keeping TIRE diameter (rim is not relevant) the same, then you shouldn't notice any mechanical or electronic issues as a result. 2% is nothing at all.

  5. #5
    Join Date
    Jul 2010
    Location
    Homeless
    My Ride
    Blue Dabadee
    Posts
    9,593
    Rep Power
    100

    Default

    Luckily only rwd, going a couple % smaller should be pretty safe for rubbing, I'm not trying to stance the car or anything. Just tough finding tires is all.

    Thanks guys
    Originally posted by Thales of Miletus

    If you think I have been trying to present myself as intellectually superior, then you truly are a dimwit.
    Originally posted by Toma
    fact.
    Quote Originally Posted by Yolobimmer View Post
    This quote is hidden because you are ignoring this member. Show Quote

    guessing who I might be, psychologizing me with your non existent degree.

  6. #6
    Join Date
    Nov 2002
    Location
    Beaumont
    My Ride
    Touareg, Cayenne, 944s
    Posts
    717
    Rep Power
    29

    Default

    What car is this for, and what is the application/reason for change? AWD cars are more sensitive to front rear rolling diameter differences. Square setups don't care, even a transmission speed sensor won't know the difference.

  7. #7
    Join Date
    Jul 2010
    Location
    Homeless
    My Ride
    Blue Dabadee
    Posts
    9,593
    Rep Power
    100

    Default

    I'll keep the car to myself (I just don't want to jinx it until it's mine).

    I'm having a tough time finding a set of GOOD winters that will fit on rims that will clear the brakes and keep diameters in line. Literally just boring old dd street use.

    Have to get a bit more creative than going with stock sizes is all.
    Originally posted by Thales of Miletus

    If you think I have been trying to present myself as intellectually superior, then you truly are a dimwit.
    Originally posted by Toma
    fact.
    Quote Originally Posted by Yolobimmer View Post
    This quote is hidden because you are ignoring this member. Show Quote

    guessing who I might be, psychologizing me with your non existent degree.

  8. #8
    Join Date
    Oct 2006
    Location
    Parked in Baygirl's garage.
    My Ride
    '21 F150 PowerBoost
    Posts
    4,592
    Rep Power
    29

    Default

    Just give Tirebob a call at urban x. problem solved.
    Boosted life tip #329
    Girlfriends cost money
    Turbos cost money
    Both make whining noises
    Make the smart choice.

    Originally posted by Mibz
    Always a fucking awful experience seeing spikers. Extra awful when he laps me.

  9. #9
    Join Date
    Jul 2005
    Location
    Calgary
    Posts
    198
    Rep Power
    0

    Default

    Originally posted by spikerS
    Just give Tirebob a call at urban x. problem solved.
    This. Tirebob or Jordan will straighten everything out for you.

Similar Threads

  1. Alignment for smaller diameter wheel vehicles

    By Cooked Rice in forum Wheel and Tire Discussion
    Replies: 13
    Latest Threads: 03-16-2016, 07:41 PM
  2. Nissan bolt diameter.

    By gpede in forum Mechanical
    Replies: 1
    Latest Threads: 02-03-2008, 10:55 PM
  3. Diameter of tires matter??

    By WWJAI in forum Wheel and Tire Discussion
    Replies: 14
    Latest Threads: 05-23-2007, 01:21 PM
  4. large diameter PVC or ABS pipe

    By TimG in forum General
    Replies: 2
    Latest Threads: 03-01-2007, 10:53 AM
  5. Different styles , Different Opinions

    By sillysilvia in forum General Car/Bike Talk
    Replies: 16
    Latest Threads: 06-10-2003, 05:30 PM

Posting Permissions

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