Page 1 of 2 12 LastLast
Results 1 to 20 of 40

Rim Width vs. Tire Width and Performance

This is a discussion on Rim Width vs. Tire Width and Performance within the Wheels and Tires forums, part of the General Help category; I'm wondering some things about tires and rims. Let's say I want to run a staggered set up (narrower front ...

  1. #1
    Senior Member Naaman's Avatar
    Join Date
    Mar 2010
    Location
    AZ
    Posts
    1,360

    Cayanne
    98 Z28 Vert M6

    Rim Width vs. Tire Width and Performance

    I'm wondering some things about tires and rims.

    Let's say I want to run a staggered set up (narrower front tires), but on the same size wheel. How does the width of the rim affect the performance of the tire. For example, if I put a 275 tire on a 9.5-inch wheel, will it behave the same as if I put it on a 10-inch or 10.5 inch wheel?

    I figure the profile will be narrower on a wider wheel (since it's "stretched" out more), but after the weight of the vehicle and the load placed on the suspension/tire are taken into account, will it behave differently?

    I understand that a wider (side to side) contact patch is better for "handling" while a longer (front to rear) contact patch is better for straight line performance (braking/accelerating), so maybe there is some insight that can be gleaned from that...

    But does anyone know how/whether wheel width affects the performance of a given tire?

  2. #2
    Senior Member theorangeguy's Avatar
    Join Date
    May 2013
    Location
    Nashville, TN
    Posts
    1,434

    Black / White
    '00 T/A M6/'15 Hemi Truck

    275 on a 10-10.5 inch wheel will stretch it a little and make it look like the rim is sticking out. 275 fits just about perfect on a 9-9.5 and looks good. It wont necessarily behave differently but it'll look different than the front wheels. I prefer my sidewalls to be just about flush with the side of the wheel and have a small amount of over lap so it doesnt look like this.



    A 275 wont look quite like that, but you get the idea...I'd rather have the wheel recessed a little bit than sticking out.

    This is the look I prefer...rims and wheels are pretty much flush with maybe a tad bit of sidewall sticking out but not too much.


  3. #3
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    These are Nitto 555's 275R17 45 on 17"x9" wheels.






  4. #4
    Senior Member theorangeguy's Avatar
    Join Date
    May 2013
    Location
    Nashville, TN
    Posts
    1,434

    Black / White
    '00 T/A M6/'15 Hemi Truck

    Quote Originally Posted by SMWS6TA View Post
    These are Nitto 555's 275R17 45 on 17"x9" wheels.


    Click for full size


    Click for full size
    thats a great example. I was trying to find some pictures to show him what a 275 looks like on a 9-9.5 so he can get an idea of what a 10-10.5 would look like. Just wont be as flush...
    2000 Black TA M6 - LT's, ORY, UMI Short Stick, TT2's, Drilled/Slotted Rotors, Braided Lines, and Tuned by Vengeance SCCA and Car Show Approved
    2015 Ram 1500 Crew Cab Sport Premium Hemi
    2010 Hemi Crew Cab Sport Premium - Tuner and HID's - Sold
    06 Quad Cab HHHHemi - Sold
    99 Hugger Orange Camaro - Sold
    97 Camaro - Sold

  5. #5
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    My next rear set will be 295R1745.

    Just want a little more meat on the back. The fronts have 255R1745

  6. #6
    Senior Member Whamhammer's Avatar
    Join Date
    Sep 2010
    Location
    Bel Air, Maryland
    Posts
    1,325

    Silver
    '02 Trans Am WS-6, 6M

    Quote Originally Posted by SMWS6TA View Post
    These are Nitto 555's 275R17 45 on 17"x9" wheels.


    Click for full size


    Click for full size
    I think you have some inner-quarter rub in that first picture.

    Aside from the differences in appearance, the amount of tread contact with the ground changes. For every +/- .5 inch of wheel width difference from the manufacture tested wheel width (ie. Most manufacturers teat 275/40/17's dimensions on a 9.5" width wheel), the tread contact width changes ~.2".

    Off the top of my head, Gyrs F1 GSD3 in a 275/40/17's tread width, tested on a 9.5" wheel is 9.4". That tire mounted on a factory WS6 or SS wheel (17x9) measures 9.2. On a 10" wide wheel, it should have 9.6" tread width. Your results may vary

  7. #7
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    those were just installed, brand new tires in that pic.

    I measured them once installed and had almost 2" to the inside well and even more top clearance.

    I can easily go to 305 size if I had the wheels to do so on the back.

  8. #8
    Senior Member Whamhammer's Avatar
    Join Date
    Sep 2010
    Location
    Bel Air, Maryland
    Posts
    1,325

    Silver
    '02 Trans Am WS-6, 6M

    Quote Originally Posted by SMWS6TA View Post
    those were just installed, brand new tires in that pic.

    I measured them once installed and had almost 2" to the inside well and even more top clearance.

    I can easily go to 305 size if I had the wheels to do so on the back.
    I know, I was funnin' ya'. The first picture is the wheels and tires in you SUV, and they were up against the quarter trim panels. (Ie rubbing)

  9. #9
    Senior Member Naaman's Avatar
    Join Date
    Mar 2010
    Location
    AZ
    Posts
    1,360

    Cayanne
    98 Z28 Vert M6

    Quote Originally Posted by Whamhammer View Post
    I think you have some inner-quarter rub in that first picture.

    Aside from the differences in appearance, the amount of tread contact with the ground changes. For every +/- .5 inch of wheel width difference from the manufacture tested wheel width (ie. Most manufacturers teat 275/40/17's dimensions on a 9.5" width wheel), the tread contact width changes ~.2".

    Off the top of my head, Gyrs F1 GSD3 in a 275/40/17's tread width, tested on a 9.5" wheel is 9.4". That tire mounted on a factory WS6 or SS wheel (17x9) measures 9.2. On a 10" wide wheel, it should have 9.6" tread width. Your results may vary
    Okay. So, I'm trying to decide between doing the same size tire on all 4 corners vs having a staggered set up. I figure if I can put the same size wheel on all 4 corners, I might be able to experiment with different tire sizes within a certain range. But I'm not interested in the "stretched" look at all. In fact, it's not even about the "looks" (but I certainly don't want anything that looks silly/ricer/bling etc). Just wondering if there is a performance sacrifice by using a narrower or wider wheel than whatever is the "standard" wheel size for a given tire size.
    Lid, Throttle Body, LS6 Intake, Heads, Cam, Magnaflow, LS7 Clutch, SFCs, STB, Panhard Bar, Strano Springs, Hollow Sway Bars, Poly/Roto LCAs, Konis, MGW Shifter

  10. #10
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    Part of the reason guys put wider tires out back is for more traction off the line. More tire meat = more surface contact.

    Now if you were planning do autox you'll want more sidewall and tires closer to each other in size.

  11. #11
    Senior Member Whamhammer's Avatar
    Join Date
    Sep 2010
    Location
    Bel Air, Maryland
    Posts
    1,325

    Silver
    '02 Trans Am WS-6, 6M

    Quote Originally Posted by SMWS6TA View Post
    Part of the reason guys put wider tires out back is for more traction off the line. More tire meat = more surface contact.

    Now if you were planning do autox you'll want more sidewall and tires closer to each other in size.
    I'd argue that autocrossers would want less sidewall because they would have less flex and be more responsive. I do agree with them wanting the same size (or pretty close).

    Staggered is to reduce friction/ rolling resistance of the front to eat up less power to move the car. Good for drag racers, bad for street cars and cars that want to brake or turn.

  12. #12
    Senior Member Whamhammer's Avatar
    Join Date
    Sep 2010
    Location
    Bel Air, Maryland
    Posts
    1,325

    Silver
    '02 Trans Am WS-6, 6M

    Lightbulb

    Quote Originally Posted by Naaman View Post
    Okay. So, I'm trying to decide between doing the same size tire on all 4 corners vs having a staggered set up. I figure if I can put the same size wheel on all 4 corners, I might be able to experiment with different tire sizes within a certain range. But I'm not interested in the "stretched" look at all. In fact, it's not even about the "looks" (but I certainly don't want anything that looks silly/ricer/bling etc). Just wondering if there is a performance sacrifice by using a narrower or wider wheel than whatever is the "standard" wheel size for a given tire size.
    I would go with 4 tires that are the, same if not very close in, size for a daily driver or car that turns.

    As far as the wheel size and tires go, think about the amount amount power and current handling abilities the car has to deal with and go from there, stock engined, poor chasis cars wont necessarily benefit from a really wide wheel tire combo. Wider wheels and tires weigh more, add drag and unsprung weight to the powertainand require more power/effort to move the car.

    Narrower wheels/tires are the opposite, but dont offer as much traction and stability.

    To the very least, I would recommend going a bit wider on the wheel and tires, than what it came with, but not insane steamrollers, unless it really needs it. There is such a thing as too much of a good thing.

  13. #13
    Senior Member Naaman's Avatar
    Join Date
    Mar 2010
    Location
    AZ
    Posts
    1,360

    Cayanne
    98 Z28 Vert M6

    Well, from what I understand, narrower front tires provide for better steering response than wider ones. I have not been able to compare the difference on the same car with different tire set ups, though, so it's all a gamble.

    From other research I've done, there is an "appropriate" tire size for each wheel size, so putting on other size tires alters the performance of the tire. Most likely I'll go with a similar stagger to what I have now, unless it turns out that the car does better on a square set up.

  14. #14
    Senior Member Naaman's Avatar
    Join Date
    Mar 2010
    Location
    AZ
    Posts
    1,360

    Cayanne
    98 Z28 Vert M6

    I've been doing some research on this. Apparently, the tire width does correspond to an ideal wheel width. According to what I've learned, the tire's tread width (not the actual width of the tire itself) should match up exactly (or just less than) the wheel width. For a 275/35/18, this means that the wheel should be 10 inches wide, ideally, since the tread width is 10 inches (note, tread width is 10" for this size tire, even though 275mm is 10.8 inches; tread width is a separate spec from the dimensions of the tire). Basically, I now understand what Wamhammer was saying (it went right over my head when he posted it).

    If the tread width is greater than the wheel width, the tire will flex or "squirm" at its limit, since its side wall is loaded more on a narrower wheel.

    So... can anyone tell me whether a 10-inch wide wheel (with 275/35/18s) will fit up front with Strano Springs (1.2" lowered) and Koni Shocks? What else do I need to consider?
    Last edited by Naaman; 03-30-2015 at 12:01 AM.

  15. #15
    Senior Member raynor139's Avatar
    Join Date
    Aug 2007
    Location
    Greensboro, NC
    Age
    33
    Posts
    1,319

    Pewter
    2002 Trans Am WS6 M6

    Up front is easy. Out back is where it gets tough. Usually the bump stop gets in the way or the wheel wells need to be modified. At 275/35/18 your fine. I run 295/35/18 and have tons of room up front still. If I lower the car I will probably need to modify the bump stops some in the rear. Other then that I still have a pretty good chunk of room back there. 305 and wider is where people tend to get in trouble but it's still mainly in the back. With the tire being a 35 the overall height of the wheel and tire are still pretty close to the same as stock.
    Last edited by raynor139; 03-30-2015 at 03:11 AM.
    Mods - Lid, Skip Shift Eliminator, MGW shifter, UMI SFCs, Founders Lower Control Arms, Founders Panhard Bar, Founders Adj. Torque Arm, UMI Torque arm mount, MWC Drive shaft safety loop, KONI Yellows, Strano Springs, Strano Sway bars, UMI Upper and lower A Arms, 160 thermostat, TSP headers and TSP true duals Monster stage 2 clutch, racetronix fuel pump, Strange S60 rear axle and tune by Frost.

  16. #16
    Senior Member raynor139's Avatar
    Join Date
    Aug 2007
    Location
    Greensboro, NC
    Age
    33
    Posts
    1,319

    Pewter
    2002 Trans Am WS6 M6

    Our cars aren't corvettes. Which were designed with staggered in mind. So unless your drag racing the car I would put the same size at all 4 corners it will drive/handle a whole lot nicer.

  17. #17
    Senior Member Naaman's Avatar
    Join Date
    Mar 2010
    Location
    AZ
    Posts
    1,360

    Cayanne
    98 Z28 Vert M6

    Wait, are you saying that I'll have trouble with 275/35/18 on the back, but not the front? I would have thought that they would fit just fine on the back. I'm running 275/40/17 on the back right now. The 275/35/18s are actually shorter (from top to bottom) than the 17s, if I'm not mistaken. ???

  18. #18
    Senior Member raynor139's Avatar
    Join Date
    Aug 2007
    Location
    Greensboro, NC
    Age
    33
    Posts
    1,319

    Pewter
    2002 Trans Am WS6 M6

    No I was giving examples of what sizes would cause problems. You would have to have at least 10.5 to start having issues. 305 on a 10.5 or 11 is where most people see issies. Alot has to deal with wheel width too. I'm running 10.5 wheels and I had to grind my bump stops down some since they were catching a little on the wheel. But that depends on the wheel too. Seen plenty of TA owners have no issues at all running 10.5 width wheels. If your gonna run a 9 or 9.5 wheel with the 275 your perfectly fine.

  19. #19
    Senior Member Naaman's Avatar
    Join Date
    Mar 2010
    Location
    AZ
    Posts
    1,360

    Cayanne
    98 Z28 Vert M6

    Okay. I was thinking about 18x10 all the way around with 275/35/18 tires.

  20. #20
    Senior Member Naaman's Avatar
    Join Date
    Mar 2010
    Location
    AZ
    Posts
    1,360

    Cayanne
    98 Z28 Vert M6

    According to Michelin:

    Quote Originally Posted by Michelin Website
    The rim width range is extremely important. This range represents proper rim widths that will assist the tire/wheel assembly in meeting its performance potential. To achieve the best balance between ride, handling and tread wear, select a rim width in the middle of the manufacturer’s range.

    To improve cornering traction and steering response, choose a rim at or near the maximum recommended width. The wider the rim width, the straighter the sidewall and the quicker the steering response. Conversely, using a rim width at the low end of the range will cause the tire to balloon or curve out, slowing steering response.

    Refer to our website for tire specifications.
    For the size I want, Michelin seems to be saying that an 11" rim width will result in the best handling/steering response, as this is the widest rim on which 275/35/18 will fit properly.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Question: Tire width options
    By dethinboots in forum Wheels and Tires
    Replies: 6
    Last Post: 01-06-2013, 05:16 PM
  2. max wheel width and tire width for C5?
    By MachWon in forum Corvette
    Replies: 18
    Last Post: 04-17-2010, 04:38 PM
  3. Question: Tire Width Concerns
    By Cobra Killer in forum Wheels and Tires
    Replies: 2
    Last Post: 02-03-2010, 01:03 PM
  4. max tire width in front for DD
    By swisscheese in forum Wheels and Tires
    Replies: 17
    Last Post: 11-12-2008, 12:07 PM
  5. tire width and height
    By Chevyfan99 in forum Wheels and Tires
    Replies: 3
    Last Post: 07-28-2008, 07:59 PM

Bookmarks

Posting Permissions

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