New 200 Rating tire....

slicer · 05-13-2018, 03:33 PM

Quote:

Originally Posted by Dreamer99

If a person went to a 295/30/19 on the rear what size would match up nicely on the front ZCP rim?

Just a general question here, is it better to have less side wall for tracking or is an extra quarter to half inch better. The 265/35 is 26.3” diameter, the 275/35 is 26.6” and the 295/30 is 26.0”.

My opinion is that I would not put a 295 on a 10" wide wheel. I would rather have a 265 on a 10". I have 285's on my 10" front wheel and that already seems too wide. Wider wheels relative to a given tire size will provide better tire sidewall support and performance (as long as not stretched beyond recommended rim width). I will be experimenting with 10.5" front wheels very soon if I continue to run 285's in front.

CSBM5 · 05-13-2018, 07:13 PM

Thanks for the PSC2 thoughts. I've considered those before, but I've no experience with them other than amazement at the prices they charge for them. I do have a set of RE-71Rs for the M3 which have been fantastic at autocross of course. PSS for normal use on that car.

Back to the PSC2 and perhaps related to the quoted link above, you need to be mindful of picking a size that is a car-maker-specific version of the PSC2 and then mixing it the generic version. In the tire engineering world, they use the term "mixability" to rate whether two tire designs are allowed on different ends of a car. I don't know any specifics of the PSC2, but tire makers who create brand specific tire versions (and often those are car-specific within the brand) are totally at the beckon call of what the car maker wants. Some want a tire that will create huge grip in the initial couple of 32nds of wear, for example, to create great reviews and test data for the magazines/media...that type of thing. The worry here is running say the "normal" version of the tire on one end and then the car-maker specific version on the other end (since it's the only option for that size). I have no idea if that is related to the quoted poster's issue of course.

Back to the RE-71R for a moment...great tires, quick wear, quick heat up on an autox course, awful "sizzle" noise in street use (running over pavement features, like the lane marking material, creating loud sizzle like noise). I can put up with that for driving to events, kind of like putting up with awful NT-01 truck tire-like-roar.

SYT_Shadow · 05-13-2018, 07:19 PM

Quote:

Originally Posted by slicer

My opinion is that I would not put a 295 on a 10" wide wheel. I would rather have a 265 on a 10". I have 285's on my 10" front wheel and that already seems too wide. Wider wheels relative to a given tire size will provide better tire sidewall support and performance (as long as not stretched beyond recommended rim width). I will be experimenting with 10.5" front wheels very soon if I continue to run 285's in front.

10.5 fits wonderfully in the front. Been running them for a couple years now

slicer · 05-13-2018, 08:43 PM

Quote:

Originally Posted by SYT_Shadow

Quote:

Originally Posted by slicer

My opinion is that I would not put a 295 on a 10" wide wheel. I would rather have a 265 on a 10". I have 285's on my 10" front wheel and that already seems too wide. Wider wheels relative to a given tire size will provide better tire sidewall support and performance (as long as not stretched beyond recommended rim width). I will be experimenting with 10.5" front wheels very soon if I continue to run 285's in front.

10.5 fits wonderfully in the front. Been running them for a couple years now

Thanks sir! Not optimistic with a coilover that has reduced inner clearance- and I don't want -4 camber. Unfortunately my coilovers are not helpful in the inner clearance dept. Plus I'm running 285 - not 275 (which is what I believe you are using). But I'm open to suggestions...

SYT_Shadow · 05-13-2018, 09:54 PM

Quote:

Originally Posted by slicer

Thanks sir! Not optimistic with a coilover that has reduced inner clearance- and I don't want -4 camber. Unfortunately my coilovers are not helpful in the inner clearance dept. Plus I'm running 285 - not 275 (which is what I believe you are using). But I'm open to suggestions...

I have MCS with helper springs which requires a 3mm spacer to clear the wheel.

The TEAL wheels have a reinforcement lip which protrudes more than a regular wheel.

When I mount 275 R1 tires vs the 275 RE71 the wheel lip still is the contact surface with the shock unless I use the 3mm spacer

slicer · 05-13-2018, 10:17 PM

Quote:

Originally Posted by SYT_Shadow

Quote:

Originally Posted by slicer

Thanks sir! Not optimistic with a coilover that has reduced inner clearance- and I don't want -4 camber. Unfortunately my coilovers are not helpful in the inner clearance dept. Plus I'm running 285 - not 275 (which is what I believe you are using). But I'm open to suggestions...

I have MCS with helper springs which requires a 3mm spacer to clear the wheel.

The TEAL wheels have a reinforcement lip which protrudes more than a regular wheel.

When I mount 275 R1 tires vs the 275 RE71 the wheel lip still is the contact surface with the shock unless I use the 3mm spacer

Are those wheels 10.5 et25 or 10.5 et27? I'm reasonably confident I could get 275/35/18's to fit.

SYT_Shadow · 05-13-2018, 10:32 PM

Quote:

Originally Posted by slicer

Are those wheels 10.5 et25 or 10.5 et27? I'm reasonably confident I could get 275/35/18's to fit.

10.5 et27

05-13-2018, 07:13 PM	#200
CSBM5 Brigadier General 2721 Rep 3,337 Posts Drives: 2019 M2 Comp, 2011 M3, etc Join Date: Nov 2005 Location: Greenville, SC iTrader: (2)	Thanks for the PSC2 thoughts. I've considered those before, but I've no experience with them other than amazement at the prices they charge for them. I do have a set of RE-71Rs for the M3 which have been fantastic at autocross of course. PSS for normal use on that car. Back to the PSC2 and perhaps related to the quoted link above, you need to be mindful of picking a size that is a car-maker-specific version of the PSC2 and then mixing it the generic version. In the tire engineering world, they use the term "mixability" to rate whether two tire designs are allowed on different ends of a car. I don't know any specifics of the PSC2, but tire makers who create brand specific tire versions (and often those are car-specific within the brand) are totally at the beckon call of what the car maker wants. Some want a tire that will create huge grip in the initial couple of 32nds of wear, for example, to create great reviews and test data for the magazines/media...that type of thing. The worry here is running say the "normal" version of the tire on one end and then the car-maker specific version on the other end (since it's the only option for that size). I have no idea if that is related to the quoted poster's issue of course. Back to the RE-71R for a moment...great tires, quick wear, quick heat up on an autox course, awful "sizzle" noise in street use (running over pavement features, like the lane marking material, creating loud sizzle like noise). I can put up with that for driving to events, kind of like putting up with awful NT-01 truck tire-like-roar. __________________ Current Stable: 2024 G20 M340i Melbourne Red/Cognac 2019 F87 M2 Competition 6MT, LBB, slicktop, exec pkg 2007 E91 328i Silver, slushbox, Eibach fr/E93 M3 rear sway bars, ARC-8
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