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This is a place to share knowledge related to 1/12th scale racing. It is not to be used for conversations.

Click links to go to manufacturer product page. If any are missing please add them!

Pre-mounted tires readily available in the US:
Pre-mounted tires readily available in the Europe:
  • Hot Race ??

Gluing your own donuts:
https://www.youtube.com/watch?v=hm7z1rz-74s - Special thanks to Edward Pickering!
Truing tires:
https://www.youtube.com/watch?v=8wqHOLWq6Uc - Special thanks to Edward Pickering!

The following information came from HERE, with some editing and information added. Thanks Christian!


BSR, CRC, Jaco:
Pro One is no longer selling to the public, but it and the brands above are all mounted by BSR and use the same foam. The nomenclature of the BSR vs Jaco/CRC is a little different in a few instances but is otherwise the same. The BSR foam consists of three families, and can be identifed as synthetics, naturals, and blends.

Synthetics - The old school, light weight, easy to true "dry feeling" tires. These include tires like CRC/Jaco Yellow (BSR White), Black, Gray, etc. These tires offer the highest wear rate and lowest grip. Many racers continue to use these nder high bite conditions.

Naturals - These tires are usually the best alternative for low bite and asphalt. They include Pink, Magenta, Double Pink, Lilac (BSR Team Purple), Purple, and other tires. These tires provide a ton of grip, but tend to get sticky in high bite conditions. This rubber does not wear as easily, and the cars will pick up gunk and fibers from the carpet under most high bite conditions. This is especially bad if the humidity is high.

Blends - These are the tires most people run today. They were initially called "JFT foam" by some, as it was believed that the tires were the same as the JFT tires. We can divide the blends further into two groups: high rubber and low rubber content. The high rubber would be the new rear Orange and Red from the BSR family, and the low rubber would be the Green and Blue varieties. When, asked about the difference, John Foister from BSR Tires said they came from the same "family" of foam, but they offered different grip. According to John, the Green/Blue has more bite than Orange/Red, but from track testing Oranges offer more bite than Green (being equivalent to in hardness) when the grip is high and absolutely no grip when it is lower. The Orange foam has a denser pore structure and the tire is not as prone to chunking. It is also important to note is that BSR Blue rears are not the same as the BSR Blue fronts!

JFT stands for Japan Foam Tire. They started the new wave of foam tires we are all using now (Blue/Blu, Green/Greene, Dbl Blue, etc). These tires are a little different than the BSR tire family, but work in very similar conditions. They offers four varieties A (asphalt), C (carpet), S (???), and R (???). This does not mean that those types only work on that surface, but this is what they recommend.

JFT uses the same foam for fronts and rears if the color is the same.

A: Used on asphalt, considered close to the natural rubber variety and are named consistently with other natural tires.
C: Used on carpet, considered a blend.
S: Used on carpet?, tires are ???
R: Used on carpet?, tires are ???

For setup, the JFT foam seem to generate more bite than the BSR, therefore the car tends to be a little more aggressive.

Ulti is another Japanese brand that offers an array of compounds. They have their own way of rating tires, and are difficult to equate to other brands. They have 4 different varieties, each in varying degrees of hardness.

J: High rubber content tire, similar to Pink/ Magenta. Soft would be close to a pink. These offer the most bite and are great for asphalt/carpet front tire. (J hard being very popular)
X: "Balanced" blend, similar to JFT Blue/ Green. Soft is equivalent to Green, medium to Blue in hardness. Great for carpet!
Y: High synthetic blend with lower grip, and is not a very popular variety.
Z: A very expensive "special" foam that is supposed to be magic on asphalt. Only make it in soft shore.
European tires:
There are many great European foam tire brands that use their own types of foam, as well as traditional foams. SOmeone with more knowledge about them will need to fill this in!

Tire Diameter:
If you are racing on carpet, you have to evaluate how much grip your track has. If your track is low to medium grip, you can run bigger tires. If you are on higher bite you have to cut them smaller, there is simply no way around it. Bigger tires are needed for asphalt, especially in the rear. The larger tires provide much needed lateral bite.

Carpet (mm):
Low - Medium Bite
Front: 42.0 - 42.5
Rear: 42.5 - 43.00
Medium - High Bite
Front: 40.5 - 41.0
Rear: 41.5 - 42.0
Big Race
Front: 39.5 - 40.0
Rear: 40.5 - 41.0
Asphalt (mm):
Parking Lot
Front: 43.0 - 44.0
Rear: 44.0 - 45.0
Prepped High Bite
Front: 42.0 - 43.0
Rear: 43.0 - 44.0

Tire Saucing:
Most facilities have moved towards odorless traction additives such as SXT. Some of additives evaporate very quickly and some do not. This seems to be something that is also dependent on tire compound and ambient temperature. For example, saucing a Green compound seems like it never dries, especially when tjhe temperature is lower. We have found that wiping the tires off 15 minutes before we go run allows the sauce to cure, which makes the car come in much quicker with Green rears. Blue compounds on the other hand, do fine when wiped off right before hitting the track.

Saucing half front and full rear is a good initial starting point. If the front of the car is too agressive you can sauce les than half, or for a shorter amount of time.
Tire Fuzzing:
In conditions of increasing grip, foam tires will somewtimes get sticky and pick up fuzz and debris from the track. This is highly dependent on the rubber sedan tire that is being run at your local track and the compound/ type of foam you are running on you car. The softer the sedan tire and the harder/higher rubber content in your foam tire, trouble with fuzzing seems more likely to occur.

There are ways to get around fuzzing under most conditions, and usually involves the selection of the correct foam compound. The more fuzz you get, the softer/lower rubber content you want to run.

Problem: Car fuzzes with Lilac/Team Purple fronts and car starts pushing.
Solution: Use a softer front tire and or different family of foam. Replace it with Blue or Double Blue front.

Problem: Car loses rear bite 6 minutes into the run. Blue rear tires look almost clean but have small carpet hairs.
Solution: Use Green rear tires. The softer compound wears instead of getting sticky, minimizing fuzz.

Tire Selection:
Starting out, pick 2 tire compounds for the front and rear. The following should have you covered 99% of the time.

Front - Green and Blue (BSR) or Green and Light Blue (JFT)
Rear - Blue and Double Blue (BSR) or Blue and Dark Blue (JFT)

You may wonder about other compounds out there and if they might be better, trust me, they probably won't be. Even if there are other tires that can be as fast, the synthetic family wears out really fast and the high natural rubber will probably fuzz on you over an 8 minute run. The blends family seems to be the most versatile foam type available today. They last awhile, and sticking to them will make your process of tire selection simpler.
Tire Charts:



JFT (Japan Foam Tire)


Enneti (Xceed)

As of now, ROAR is staying 1S (3.7V nominal; 4.2V fully charged) for 1/12. There are many 1S ESC's with a built in BEC so nothing else is required to power the receiver and servo.

If you don't want to lock yourself into a 1S specific ESC, you do have other options! It is possible to use your 2S ESC without a booster or receiver pack, and the ESC simply supplies the lower voltage. If that does not appeal to you, you will need to use an Rx pack or booster. The Rx pack and booster will both supply the receiver with a higher voltage than the 1S pack.


If you choose to use a voltage booster, it works exactly how it sounds. Instead of plugging the ESC into the receiver, it plugs into the booster, and the booster plug goes to the ESC, supplying the higher voltage.

If there are any missing please add them!!

If anyone would like a need for a chart comparing the ESC's specs PM fenton06 and I'll get one made and put in here!
Voltage Boosters:
If there are any missing please add them!
Black Art (CRC - US Dist):
  • Audi R8C - BA002 - .020 Thick

  • Black Market (Mohawk 12) - BA005 - .020

  • Lola B10 - BA006 - .020 thick
  • Toyota TS030 - BA008 - .020 thick

    Lola - black/red, TS030 - green/pink


Reflex Racing/RSD:


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Old 08-23-2006, 01:06 PM   #20116
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Originally Posted by speed-e
Originally Posted by Scottrik
Too late...take a look at the bodies we use in 1/12 and show me how they even come CLOSE to resembling anything in 1/1. While I was gone we've managed to bastardize "scale" here too. We've followed the EXACT same slippery slope slot cars plunged off of into the land of "thingies".

When I raced 1/12 and 1/10 pan in the late 80's and early 90's the cars looked like real cars (Nissan GTP, Jag XJ10/12, Porsche 962, etc. Now they look like charicatures. When I saw a Speed 12 body on display when I was checking out getting back into the hobby I had to ask about it--no way I figured that was a ROAR-legal body. Surprise.
I agree 100%. I last raced 1/12 in '88 and when I got back into the scale a month ago I was amazed at how far out of scale the available bodies had become. I've looked everywhere and cannot find a somewhat realistic body.

I have no problem giving up some aero advantage. Anyone know where some "old school" bodies are still available?
I see the Associated TOJ body is still available, at least at Tower. Does that give up too much aero?

What are some other good sources of 1/12th scale info? Websites, magazines, etc. (Already have the Lufaso link, thanks) I've started at the beginning of this thread and have gotten to page 36 or 37

I just bought a RC12L3... hasn't arrived yet. Looking forward to running 4 cell stock on indoor asphalt and/or carpet. Previous experience is in 1/10th electric and nitro TC.


Last edited by BimmerDriver; 08-23-2006 at 08:13 PM.
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Old 08-23-2006, 02:11 PM   #20117
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I've been waiting to see some info on the new Corally as well.

I am looking at getting another 12th scale to setup for brushless/19turn/mod depending on who I have to race with and I don't want to change out my Tfource to do it.

Plus it would be nice to just have something different to run.

EA it looks like you are coming to WOH this weekend, maybe I'll get a chance to meet you and some of the others on here.

I'm not as good as I could be, but I am a much improved version of what I once was.
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Old 08-23-2006, 05:00 PM   #20118
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Originally Posted by burgboyz
Hey nf_ekt, try calling scotty at trackside.
I remember seeing a pair of the nissan bodies there in late july.
On sale too!!!
Hey chop sticks, are they still hanging there???
Thanx I might give a call to see. I love the nissan shell I can drive it hard and the car is stable. It's a looker .
Up the Irons \m/

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Old 08-23-2006, 06:18 PM   #20119
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Anyone wants to leave from O-town with me let me know. We'll split gas
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Old 08-23-2006, 06:58 PM   #20120
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Originally Posted by JayBee

Any word on this puppy?
September 1st is the date going around the grape vine
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Old 08-23-2006, 10:03 PM   #20121
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Originally Posted by IslandBwoy
Anyone wants to leave from O-town with me let me know. We'll split gas
I might be up for that.
Up the Irons \m/

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Old 08-24-2006, 01:46 AM   #20122
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The P35 is still available through Corally Germany. They have a mold.
The Corally cars are scheduled to be released somewhere in October.
The cars won't be cheap!
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Old 08-24-2006, 03:00 AM   #20123
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No the 12X won't be cheap. There are indeed 2 versions. I need to check, but the way i read the release they both have corally front end (not the same as in the origional pics), but the "US spec" does use standard wheels front and rear.
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Old 08-24-2006, 05:19 AM   #20124
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Can anyone tell me what experiance they have had with the CRC Pro Cut tires. they are on the Bigger wheels? any ideas ?
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Old 08-24-2006, 05:35 AM   #20125
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Same great foam, slighly bigger rim. I used them all last carpet season with no problems. (Std. gray rear, purple front setup)
The products and places I support.
www.michianarc.com www.facebook.com/michianarc - www.russellrc.com
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Old 08-24-2006, 06:25 AM   #20126
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hey Shawn... i have run some of the pro-cuts with mixed results... i had a few light chunking issues, but i actually had one of the rears separate right down the middle, like the glue that held them together let loose. kinda strange...


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Old 08-24-2006, 06:49 AM   #20127
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I tested 3 sets on Ozite and I didn't like them. The fronts were ALL out of round (the wheel, not the tire), and the rears pulled apart at the foam to plastic glue seam very easily. If you don't glue the rear sidewalls, they will come apartóregardless of compound or motor choice. CRC didn't give me much of an answer when I questioned the wobbly fronts or the rears pulling apart. They just said they'd replace them for me, but if they hand-pick my replacements, what's to say that the next set I buy off the shelf won't suck, too?

I went back to Jacos, myself.
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Old 08-24-2006, 06:57 AM   #20128
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the splitting due to glue/cement in the middle coming undone happens on CRC, and Jaco tires when using Jack the Ripper on them. when the tire is small and if you soak them alot prior to a race day, they would start rolling off rim edges. a issue with two-stage tires you have to watch is when your tires are small the outerfoam will separate from the harder foam core. this happened to me when i was at ACR in Oklahoma. i was using full Jack soak on the fronts and by the third heat i had noticed my fronts were peeling bad. 3 weeks later went to Fastlane with the same type tires cut down using TQ Mod and had no problems thru 4 heats. i never had this issue with the Parma and the older TRC's. I haven't tried any of the new TRC (partnered with Jaco) tires with the Jack sauce.

Last edited by fast-ho-cars; 08-24-2006 at 07:12 AM.
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Old 08-24-2006, 07:31 AM   #20129
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may i know what is the best starting tire diameter for 1/12? and what tire compound will be the best choice in carpet track? thanks
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Old 08-24-2006, 07:35 AM   #20130
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I ran pro cuts all last year without any isses. Its nice to be able to buy a new set of tires and just throw them on the car without having to true them down yourself to the size you want, I love it!
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