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275 40 20

Started by avidmotion, March 26, 2018, 02:00:24 AM

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dubcitySHO

I wouldn't hesitate to much to run a 275 on an 8.5 inch wheel.  I love me some tire bulge.  There not going to separate a bead any easier than a 245 would.  Look how far the VW and Honda community stretch their sidewall for the sake of tuck AND poke, and their failure rate isn't as high as one would expect.  Going the other way would be safer IMHO.
2018 Magnetic Metallic F-150 XLT FX4 SCrew, 20% 3M Tint, Currently researching reputable F-150 tuners....

lamrith

Quote from: irondoor19 on April 05, 2018, 11:42:31 AM
Quote from: Colorado-SHOBro on April 05, 2018, 11:16:35 AM
Quote from: jman on April 04, 2018, 11:44:02 PM
I got 275 40 20 with H&R springs, no rubbing. Car looks great with these.
How wide are your wheels jman?

not trying to hijack but:

2011 PP with H&R's, Motegi MR120 Black 20 X 9 Wheels (W 275/40ZR-20 Pirelli P Zero's)
Those 275 look to fit on the 9" wheels pretty well.  Any idea what the offset is on those wheels?
'13 Sho PP, SCT x4, AJP 92-Octane rev6 (14psi&20spark) NGK 6510, 3Bar, K&N CAI, PPE Catted DP, Dynomax Axleback, 20*9.5 Voxx Lago w/ 275/40-20 GMAX AS-05.

jman

#17
Quote from: jman on April 05, 2018, 02:00:23 PM
Quote from: Colorado-SHOBro on April 05, 2018, 11:16:35 AM
Quote from: jman on April 04, 2018, 11:44:02 PM
I got 275 40 20 with H&R springs, no rubbing. Car looks great with these.
How wide are your wheels jman?

I'm not 100% sure, I believe 10". Will try to get a rough measurement tonight.
I just measured the rim from lip to lip and got about 10.5"... so definitely 10".

2010 - Unleashed Tune - Corsa Exhaust - 275/40-R20 - H&R Springs

Colorado-SHOBro

Quote from: AJP turbo on April 05, 2018, 02:35:45 PM
Quote from: jman on April 05, 2018, 02:00:23 PM
Quote from: Colorado-SHOBro on April 05, 2018, 11:16:35 AM
Quote from: jman on April 04, 2018, 11:44:02 PM
I got 275 40 20 with H&R springs, no rubbing. Car looks great with these.
How wide are your wheels jman?

I'm not 100% sure, I believe 10". Will try to get a rough measurement tonight.

Aren't 10" a bit wide for a 275?...BTW I love a 275/40 on the SHO...Grip monster....SHO bro I would put a 275 on a 8.5...Maybe a bit of a bulge but not bad...I have a 305 on my 9.5" mustang wheel...It's similar in terms of how much wider the tire is than the wheel.
TBH i'm not sure i'd gain a whole lot of real word contact surface by going that much wider on an 8.5" rim. the bulge would curl the shoulder of the tire in and reduce the effective width of the tire. or am i wrong?
if i had more of a problem with grip i'd look into it further . . but you know my struggle at this altitude, it's hard to build enough boost off the line to break traction a whole lot. and even then i think torque source 15 might shut me down.


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11' SHO Tuxedo Metallic black-non PP | Highly sophisticated high altitude custom AJP Turbo E30 3Bar tune w/Wastegate mod | Cat'd ceramic PPE downpipes |170 stat| SP542 plugs .028 | PP trans cooler | H&R springs | RX catch can

12.8@108 @ 6,000ft DA.

avidmotion

Yea I wanted the 255, only looked at stock size at the price. Going stock size with the RS, least expensive of the bunch....
Sp542@.028, windstorm CAI, MSD coils, AO GH TUNE, GH intercooler, All Amsoil, General Gmax-rs summer tires, +PP, PP PADS,EDC rotors, Colinite 476s wax, used PPE DPs, Resonator | 3rd Cat Delete with custom X pipe, Dicunzolo Gen2 Trans Mounts|, 3 bar, stock thermostat,  TRACY LEWIS DESIGNED Team RXP, the Original oil separator.

lamrith

Quote from: avidmotion on April 09, 2018, 05:40:57 PM
Yea I wanted the 255, only looked at stock size at the price. Going stock size with the RS, least expensive of the bunch....
Yeah that is too bad.  I was interested in 255's as well.

Nice writeup on the tires.  Interesting comment about the 45day free trial.
http://www.hotrod.com/articles/generals-g-max-rs-may-change-the-way-uhp-tires-are-made/
'13 Sho PP, SCT x4, AJP 92-Octane rev6 (14psi&20spark) NGK 6510, 3Bar, K&N CAI, PPE Catted DP, Dynomax Axleback, 20*9.5 Voxx Lago w/ 275/40-20 GMAX AS-05.

lamrith

I am hoping that this will work on all 4 corners with the 275/40-R20.
Planning to go with the Lago's in 20*9.5 / 35 as that should let me run 255's or 275's in case the 275 rub.
https://www.willtheyfit.com/index.php?width=245&aspect=45&diameter=20&wheelwidth=8&offset=38&width2=275&aspect2=40&wheel_size=20&wheel_width=9-5&offset2=35

Another option is the AMR's in 20*8.5 / 30.  AMR will give me more clearance to the struts, not as much poke, but I worry giving up the inch means no 275's either?
https://www.willtheyfit.com/index.php?width=245&aspect=45&diameter=20&wheelwidth=8&offset=38&width2=255&aspect2=45&wheel_size=20&wheel_width=8-5&offset2=30

'13 Sho PP, SCT x4, AJP 92-Octane rev6 (14psi&20spark) NGK 6510, 3Bar, K&N CAI, PPE Catted DP, Dynomax Axleback, 20*9.5 Voxx Lago w/ 275/40-20 GMAX AS-05.

lamrith

So, does anyone that is running 275's all around have any regrets, comments or tips to share about going with the wider size now that they have put miles on their cars?

Any unforseen issues, negative effects on handling, sluggish steering,  etc?  Would you do it again, or would you maybe drop back to 255's up front or all around?
'13 Sho PP, SCT x4, AJP 92-Octane rev6 (14psi&20spark) NGK 6510, 3Bar, K&N CAI, PPE Catted DP, Dynomax Axleback, 20*9.5 Voxx Lago w/ 275/40-20 GMAX AS-05.

irondoor19

#23
NO regrets, H&R's and these tires are the bomb, I am thrilled..
No Rubbing, however, the wheels have to be the correct offset
My wheels Were +38 Offset, Link to the wheels and site: SO 20 x 9  5 x 114.3 , +38

OH yea, when i bought them "ON Sale" 807.00 for the Set, to my Door

http://www.customwheelsexpress.com/custom-wheels-by-brand-motegi-motegi-racing-mr120-120-satin-black-custom-rims-wheels-p-877.html
2010 Lincoln MKS, BONE Stock for Now, 2014 3.7L Police, Drop IN K&N,

jman

I've only had my SHO for a month +, car does act funny while backing up on a dry/clean road with the wheels fully turned to either side but I've experienced that with other vehicles.
Handling is awesome (also have the H&R's), lots of grip. No sluggish steering.
So far I'd say I like the 275', the hard suspension not so much.



2010 - Unleashed Tune - Corsa Exhaust - 275/40-R20 - H&R Springs

lamrith

Thanks guys!!

The Wheels I am I am looking at are: 20x9.5  +35.  So they are wider, but also pushed away from the strut a touch more to counter that wider width.
'13 Sho PP, SCT x4, AJP 92-Octane rev6 (14psi&20spark) NGK 6510, 3Bar, K&N CAI, PPE Catted DP, Dynomax Axleback, 20*9.5 Voxx Lago w/ 275/40-20 GMAX AS-05.

LostnEye

Quote from: lamrith on April 14, 2018, 02:35:17 PM
Thanks guys!!

The Wheels I am I am looking at are: 20x9.5  +35.  So they are wider, but also pushed away from the strut a touch more to counter that wider width.
That's what I'm running with 275/40s, stock PP suspension
2013 Tuxedo Black/Mayan Grey PP, GH AO, GH IC, H&Rs, AD mounts

mrhighcaliber

275/40/20 9.5" +40mm offset. About 4mm clearance to the strut.

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lamrith

wow, that is really close.  Wheels I am looking at are +35 so I will be around 9mm then give or take..

Thanks Mrhighcaliber!
'13 Sho PP, SCT x4, AJP 92-Octane rev6 (14psi&20spark) NGK 6510, 3Bar, K&N CAI, PPE Catted DP, Dynomax Axleback, 20*9.5 Voxx Lago w/ 275/40-20 GMAX AS-05.

mrhighcaliber

Quote from: lamrith on April 18, 2018, 12:29:23 AM
wow, that is really close.  Wheels I am looking at are +35 so I will be around 9mm then give or take..

Thanks Mrhighcaliber!
Glad I could help!

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