Sparco Assetto Gara vs. Motegi MR125 vs. O.Z. Ultraleggara on Dunlop Direzza DZII

Discussion in 'Fiesta ST Wheel and Tire Upgrades' started by McRib 1s Back, Dec 20, 2013.

  1. McRib 1s Back

    McRib 1s Back Well-Known Member

    Picking up on stuntdoogie's $1700 upgrade thread, I'm pretty much settled on buying a new set of wheels and tires (hopefully later today!). My combo of the AccessPort, filter, wheels, and tires should only blow the $1700 budget by a tiny bit. ;)

    Okay, I'm good with the Dunlop Direzza DZ101 tire choice, but not the size! So much of what I like about this little car is the steering feel along with the absence of torque-steer and bump-steer! If I learned anything with my past customizations, it's that wheel and tire choice can greatly affect these qualities (especially on FWD!). For those of you that went the 225/45/16 route, can you comment on this? Maybe for low-speed auto-x, it's not an issue? Or maybe it's not enough of an issue to offset outright grip gains? To say it plainly, I value the overall feel more than grip. If I don't have to give up width, I won't, of course.

    So, my dilemma is whether to choose 16x7 on the Sparco, Motegi, or O.Z. Then, which tire size? I'd appreciate thoughts on this. Thanks!
    Last edited: Dec 20, 2013
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  3. limbo

    limbo Active Member

    I race on 225/45/16 z2's and noticed no change in overall feel (other than the huge increase in grip).

    Bumpsteer and torque steer really should not be affected by tire size choices. Compound is more important when it comes to torque steer - generally more grip will equate to less torque steer. Bumpsteer is generally more dependent on suspension, but having tires with larger sidewalls could make the car less susceptible to being jarred over bumps.

    I'm not sure about the DZ101's, though, and how they will differ from the stock tires. Turn-in feel could be compromised if the sidewalls are not strong.
  4. limbo

    limbo Active Member

    As far as the wheel question goes, I'd go Sparco or OZ - Motegi's reputation seems a bit shaky and I'm not a fan of the styles. Deciding between Sparco or OZ depends on your budget. For me, I chose Sparco because of the price.
    Smokin likes this.
  5. RodMoe

    RodMoe Well-Known Member

    OZ for weight savings and i heard some stuff about Montegi too though i have had good luck with the set i use for our hondas in AutoX
  6. McRib 1s Back

    McRib 1s Back Well-Known Member

    Thanks for that. Sure, I'd generally agree with you, but I've certainly felt like both torque steer and bump steer have been exacerbated by poor wheel/tire/offset combo choices. It's also the biggest thing to affect steering feel in general.

    For FWD, I think bump steer with road undulations is worse on bigger tires -- and why I asked about where these are being used. Relatively smooth roads and tracks versus life in the city. Most of the FWD cars I've driven also had pretty limited suspension travel, and I guess the FiST isn't much different? My SE-R felt like it had 2" of travel, so the spring rate approached infinity pretty fast on bumps!

    You've helped me make make up my mind, however. One last question: Are those tires more narrow than typical? You know how this varies by manufacturer, right? I read a few comments along those lines, and I'm wondering if 225s in general would be too wide. No rubbing in auto-x probably means no rubbing anywhere. Thanks!
  7. stuntdoogie

    stuntdoogie Active Member

    Just mounted 17x7 black sparcos with my AS 205 45 generals and boy what a difference they made on my car. I can feel the lesser rotational mass weight in throttle response and cornering. My ST feels nimbler and I dont feel the 1st gear strain as much like with the heavy ass stockies. They look great on my Tux Blk and tints. The only two negs are they now spin easy on standstill take off if you wot and caps came in blue, so first thing in the morning im goin to a custom vynl decal shop and either cover them in black or Black background and red ST logo. Ill post some pics tonite.

    Sent from my SPH-D710 using Tapatalk
  8. McRib 1s Back

    McRib 1s Back Well-Known Member

    Ugh -- I really meant to type Dunlop Direzza DZII, not 101! I'm trying to build a set of wheels for that I can use for track days and fun driving on the weekends! I have no idea what kind of tire the 101 is, but it looks like a long-wearing, lower performance setup.

    So this tire with Sparco Assetto Gara look like the winners.
  9. McRib 1s Back

    McRib 1s Back Well-Known Member

    Cool! I have the same color car, and I'm getting tint done in the morning (going 20-25% in back three windows, and something very light up front). Can you share photos of your ride with this setup, please?
  10. RodMoe

    RodMoe Well-Known Member

    I thought the 101 was the old DZ1 starspec or a offshoot of it .. as you say at a lesser price/performance level
  11. limbo

    limbo Active Member

    The Z2's have a really strong sidewall and are in the top 3 as far as competitive street tires go. You will not be disappointed compared to the stock tires.

    From my understanding the Z2's run a little large and no problems with 225 on 7" +42 offset.
  12. limbo

    limbo Active Member

    The 101 is a step down in compound from the old star spec even. Would not recommend it for any serious driving.
    k757 and RodMoe like this.
  13. McRib 1s Back

    McRib 1s Back Well-Known Member

    I really appreciate all of the input, thank you! I just placed the order (using our special Fiesta ST link)! It looks like I'll get them on the 26th!

    Here are my details for reference:
    1 OEM Ford TPMS Triggering Tool In Stock $45.00 $45.00
    4 225/45R-16 Dunlop Direzza ZII In Stock $129.00 $516.00
    4 Mount and Balance (No Charge) In Stock N/C N/C
    4 16x7 Sparco Assetto Gara BLK PAINT In Stock $109.00 $436.00
    4 Required centering ring In Stock N/C N/C
    16 Required lugnut for vehicle (nickel plated) In Stock N/C N/C
    4 315MHz Tire Pressure Sensor In Stock $32.00 $128.00
    4 Optional Black Metal Valve In Stock $4.99 $19.96

    Note: As a complimentary service to you, the Tire Identification Codes for the tires you purchased will
    be automatically registered with the Department of Transportation (DOT).

    Vehicle: 14 Ford Fiesta ST

    Shipping: $123.85
    Order Total Including Shipping: $1,268.81
  14. stuntdoogie

    stuntdoogie Active Member

    I didnt need to use the triggering tool, no tpms light came on so a waste of $45, and removed the metal black valves from my order.

    Sent from my SPH-D710 using Tapatalk
  15. McRib 1s Back

    McRib 1s Back Well-Known Member

    I was on the fence about the tool, but it seemed useful (and it's actually the OEM unit). The black valves were auto-suggested, seems okay?

    Thank you for the photo links, but it doesn't seem to work right now. After you wade through all of the ads, it states "oops something went wrong". I notice they use Amazon S3 storage. I'll try again later.
  16. stuntdoogie

    stuntdoogie Active Member

    The Mechanic who mounted and balanced the wheels and tires.
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    Last edited: Dec 20, 2013
  17. McRib 1s Back

    McRib 1s Back Well-Known Member

    That works -- it looks great. Thanks!
  18. stuntdoogie

    stuntdoogie Active Member

    Just added more pics.

    Sent from my SPH-D710 using Tapatalk
    pelotonracer2 likes this.
  19. wash

    wash Active Member

    Do you think you could measure the wheel spoke to caliper clearance?

  20. stuntdoogie

    stuntdoogie Active Member

    ill try to remember tomorrow.
  21. stuntdoogie

    stuntdoogie Active Member

    Omg only second day and these wheels are dirty as fuck and have thick brake dust and grime thats tough to get Rados where much easier to clean ugh...

    Sent from my SPH-D710 using Tapatalk
    LuvfiestaST likes this.

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