New A052 Lotus Friendly Sizes Being Released Feb/March - Page 2 - LotusTalk - The Lotus Cars Community
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post #21 of 63 (permalink) Old 02-11-2019, 01:08 PM
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16x9 +45 Advanti Storm S1. They require about 15mm of spacer to fit in the rear. Even then, it's tight and I'd need to run the suspension through its entire travel to verify.

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post #22 of 63 (permalink) Old 02-11-2019, 01:19 PM Thread Starter
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16x9 +45 Advanti Storm S1. They require about 15mm of spacer to fit in the rear. Even then, it's tight and I'd need to run the suspension through its entire travel to verify.
Barely fits with a 245 width tires (if so what type) and where is it close to rubbing?
Fred is fitting the 255s out back with the RS4s (which also run super wide) but the offset needs to be perfect it seems
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post #23 of 63 (permalink) Old 02-11-2019, 02:37 PM
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Barely fits with a 245 width tires (if so what type) and where is it close to rubbing?
Fred is fitting the 255s out back with the RS4s (which also run super wide) but the offset needs to be perfect it seems
I'm a big proportion of running 225s with 9 inch wide wheels (see my earlier posts in this thread). Empirical testing has shown that over-tiring a wheel just doesn't offer a benefit. Regardless, there isn't a great selection of 245 width 16 inch tires anyway; you'll have better luck with 225s.

The 16x9 wheel is physically close to the coilover collars (exacerbated by me because I run tender springs instead of letting the springs hang loose as Fred does for stock Penskes). If you don't have tender springs, the only area of concern is the lower A-Arms, which gets close to the wheel rim at the top of travel.

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post #24 of 63 (permalink) Old 02-12-2019, 03:15 AM Thread Starter
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I'm a big proportion of running 225s with 9 inch wide wheels (see my earlier posts in this thread). Empirical testing has shown that over-tiring a wheel just doesn't offer a benefit. Regardless, there isn't a great selection of 245 width 16 inch tires anyway; you'll have better luck with 225s.

The 16x9 wheel is physically close to the coilover collars (exacerbated by me because I run tender springs instead of letting the springs hang loose as Fred does for stock Penskes). If you don't have tender springs, the only area of concern is the lower A-Arms, which gets close to the wheel rim at the top of travel.
I heard what you said, and I've seen the opinions from the miata crowd, but the fastest Lotuses don't seem to agree with that theory.
I choose to follow whats working on our platform. So I'm looking to fit the widest tires I can, with wide wheels too, 225s are not faster than a 255. 225s on a 9" rim are faster than on a 7" rim yes, but not faster than a 255 on the same rim.

EDIT: handling feel could be another place you could make an argument, less sidewall bulge = less deflection of the sidwall and more solid feeling handling, but again I'm looking for the best lap times if I'm going to go through the effort of having a second set of rims/tires

Last edited by Ls1Rx7; 02-12-2019 at 04:58 AM.
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post #25 of 63 (permalink) Old 02-12-2019, 05:36 AM
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..but again I'm looking for the best lap times if I'm going to go through the effort of having a second set of rims/tires
If you're going for the best lap times on a second set of tires, why is this topic even on A052? You should be on yoko slicks - is 200TW a requirement of a series you run?

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post #26 of 63 (permalink) Old 02-12-2019, 08:02 AM
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Rocks getting picked up by the tires getting thrown straight up from the back of the tire. Mine started cracking after less then 100 miles of street driving with no liner.
I concur. This will happen with sticky tires and you will crack the clam from inside.

I don't believe you can get enough heat in a street tire that is wider than 205 at the front. Of course, if this is simply for show then go as wide as you want but rubbing will occur. If handling is paramount, don't go wider than 205 at the front.

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post #27 of 63 (permalink) Old 03-01-2019, 08:58 AM
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So what about A052 205/50/16 fitting? If it is possible what I need to do to minimize liner rubbing? Rear A052 is 235/45/17 or 255/40/17. Are 235/45/17 fitting fine on the rear?
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post #28 of 63 (permalink) Old 03-01-2019, 09:32 AM
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So what about A052 205/50/16 fitting? If it is possible what I need to do to minimize liner rubbing? Rear A052 is 235/45/17 or 255/40/17. Are 235/45/17 fitting fine on the rear?

The front will rub. If you want to minimize rubbing, don't drive it, or drive like a grandma at all times (which begs the question, why buy performance tires in the first place). STOCK size tires will rub in certain situations, so making the tire even taller... it should be clear what will happen.

The rear is also taller, so you'll be slower but probably not noticeably so unless you drive the car in a performance setting.

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post #29 of 63 (permalink) Old 03-01-2019, 03:02 PM
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So what about A052 205/50/16 fitting? If it is possible what I need to do to minimize liner rubbing? Rear A052 is 235/45/17 or 255/40/17. Are 235/45/17 fitting fine on the rear?
Basically you cant run the often used 205/235 Direzza specs on these new A052's...I did, and with the car in its track stance, those 52s were on the fender just standing still. I immediately propped the car up and sent them back to TR until the proper sizes are to be released. They def run wide/tall.

I went with R888R's. I'm still very curious how these will do though and plan to revisit them once the proper sizes are released. The idea of an R (softer) with that high of a tw is enticing to say the least. Plus, I'm an RE11/71 guy, and love those tires, as they've proved to be nearly as good as 888's with better predictability.

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post #30 of 63 (permalink) Old 03-01-2019, 04:21 PM
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Interesting thread.

I also am using Fred's 949 Racing 6UL 15x8 and 17x9. Since I am primarily using it for autocross and some track soon, I am using Bridgestone RE71Rs tires. The 15" front is a bit of problem finding a wide enough tire but I like the feel of the RE71Rs so much that I stretched a 205 onto the 15x8. It works fine. What the dedicated autocrossers have found, particularly the Miata folks, is that the decrease in width appears to be compensated by the increase in sidewall stiffness. Many serious Miata folks run 9" wheels with 225 tires. IIRC, there are a bunch of articles at Grassroots magazine that document the process that Andy Hollis and David Whitener write. They do dedicated testing every year to give us autocross/track folks the best data. They also have at least one article where they tried to answer the question of wheel size versus tire width.
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post #31 of 63 (permalink) Old 03-04-2019, 04:13 PM
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Dang, I was looking forward to trying these tires. It looks like a052s 205/50/16 front and 235/45/17 rear on LSS wheels with stock ride height will rub?? Is that correct?
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post #32 of 63 (permalink) Old 03-04-2019, 04:26 PM Thread Starter
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Dang, I was looking forward to trying these tires. It looks like a052s 205/50/16 front and 235/45/17 rear on LSS wheels with stock ride height will rub?? Is that correct?
I' being told that 205/50/15 will possibly run so 205/50/16 will deff rub
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post #33 of 63 (permalink) Old 03-04-2019, 05:01 PM
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Currently running Toyo R1R 205/50R16 & 235/45R17 on the stock LSS wheels, stock track suspension, and it doesnít rub normally. Iíve had it rub once in a blue moon hitting a hard bump or corner in a parking lot. Previous owner says it almost never rubbed for him too.


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post #34 of 63 (permalink) Old 03-04-2019, 05:03 PM Thread Starter
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The new plan is knowing these run wide, I am thinking about buying 235/45/17s for the back, from Tirerack, and then buying either 205/50/15s or 205/40/17s depending on if I really want to go with a seperate wheel/tire combo for the track.

If these run as wide as people say they should be similar in width to some 225s. My hope is that the additional sizes being released in the UK will also be relased in the US and save me some money in shipping. These have been shown to be faster than just about anything short or Hoosiers, plus having even greater feedback than the Re71rs.
Backup plan is the Re71rs.
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post #35 of 63 (permalink) Old 03-04-2019, 05:11 PM
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I' being told that 205/50/15 will possibly run so 205/50/16 will deff rub
Thank you for confirming. I will probably go with R888s or RE71Rs in those sizes then.


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Currently running Toyo R1R 205/50R16 & 235/45R17 on the stock LSS wheels, stock track suspension, and it doesnít rub normally. Iíve had it rub once in a blue moon hitting a hard bump or corner in a parking lot. Previous owner says it almost never rubbed for him too.
More options. Good to know. Thanks
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post #36 of 63 (permalink) Old 03-04-2019, 06:40 PM
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I just contacted Yokohama directly today to see when they plan to offer the proper 16" front tires sizes in the US.
Need to make a decision soon as track season is approaching quickly.

I still have a fairly new set of R888 fronts but need at least new rears.
I really would like to try the AO52s, but does anyone have any practical info on mixing R888 in the front with R888R in the rear?
The first events in the spring will be at low track temperatures, so the tires will probably have difficulties getting to optimal temperatures anyway.
And my setup/driving style is normally neutral with a tendency to oversteer, so the newer rubber in the back should potentially just shift that to neutral with a tendency to understeer.
This would just be to bridge the gap until the AO52's finally become available.
I do not need the forum police's response saying never mix tires.
I'm more looking for real world experience here.

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post #37 of 63 (permalink) Old 03-05-2019, 09:46 AM
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I would not have a problem putting the R888R on the rear with R888 up front. If anything it might tend to understeer.

Someone correct me if I am wrong, but I through the carcass and rubber compound were the same between the two tires, just a change in tread design.
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post #38 of 63 (permalink) Old 03-05-2019, 03:20 PM
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...I really would like to try the AO52s, but does anyone have any practical info on mixing R888 in the front with R888R in the rear?
...
I think it would be safe enough if you take the first couple of sessions on track to find the limits and how the car is behaving (understeer, neutral or oversteer). I find that the R888R seem stickier. You may not set your personal best lap but it should be a fun test.

I am curious about the A052 as well....

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post #39 of 63 (permalink) Old 03-05-2019, 03:47 PM
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I would not have a problem putting the R888R on the rear with R888 up front. If anything it might tend to understeer.

Someone correct me if I am wrong, but I through the carcass and rubber compound were the same between the two tires, just a change in tread design.
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I think it would be safe enough if you take the first couple of sessions on track to find the limits and how the car is behaving (understeer, neutral or oversteer). I find that the R888R seem stickier. You may not set your personal best lap but it should be a fun test.

I am curious about the A052 as well....
That's what I figured.
And since our front tires always last twice as long as the rears, and I basically run new fronts only with every other set of new rears, the difference is probably not all that big.

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post #40 of 63 (permalink) Old 03-09-2019, 06:49 AM Thread Starter
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Another quick review:
The A005 slicks he references at the end btw are comparable to A6/R6s some even feel they're stickier/faster. So on a 90 second course he was within 1 second of his best lap time on those slicks with the A052 a true street tire.


Also, I called up Yoko USA again and it looks like these other sizes are still in pre-production with no date of release posted yet. But I can't imagine they'd miss out on this year's racing season which is what I said to the rep and he said well I don't know exactly when they're coming out but there will be a sale on April 1st so keep an eye out around then.

Right now I don't see much benefit to going to a dedicated track wheel setup, so I think I'm going to go 215/40/17 up front and 235/45/17 out back (I think a 245 would be more balanced but I'm worried it wont fit with these running wider)
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