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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!


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Old 09-17-2002, 06:19 AM   #1471
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Originally posted by raffaelli
as far as bodies. i have found the nissan to not have the steering that the parma does. i will try out the yokomo as soon as a paint it.

Where are you running and when?

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Old 09-17-2002, 06:56 AM   #1472
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Hi Dave. I heard about your Friday night. Recover yet? I built my car Saturday and went to South Shore with Miller on Sunday. If it rains I will be there again this Sunday, if no rain, it's 1.8th for me. South Shore talked about started the SUnday program near the end of October. See you soon.
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Old 09-17-2002, 10:27 AM   #1473
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Startup question: Guys, some of us at the local track are think of going 1/12. Suggestions for which kit. We will all be green at this but one who ran 1/12 5 years ago. None of us have kits. Track is carpet oval now with a banked transistion into the TC area. New track, will be flat ozite We are talking 6 cell stock.
I run an X-Ray now on the track and do pretty well. Just looking to try something different this winter.
I too have a T1 and when I was having problems with my electronics I had nowhere to turn to but the CRC Carpet Knife 3.1 I picked up from a friend.. let me tell you this.. you will nover go back.. I have so much more fun with my 1/12th scale I am thinking of getting rid of my TC stuff. These things FLY!

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Old 09-17-2002, 04:27 PM   #1474
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Default transponder mount


Hi I know i will probably have to make my own,but just wondering
if anyone makes a good transponder mount for 1/12?

Thanks in advance!
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Old 09-17-2002, 06:17 PM   #1475
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Originally posted by raffaelli
Hi Dave. I heard about your Friday night. Recover yet?
Wow, word sure spreads quick... Where'd you hear it from?

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Old 09-18-2002, 03:11 AM   #1476
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F1: Thanks. I remember your posts. You gave me a starting setup for carpet with the T1 . Everyone else runs an TC3. Doing much better with the X-Ray, but we want to add something different.
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Old 09-18-2002, 07:06 AM   #1477
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That Yokomo body mounted right up, all marked, no guess work. I think the steering will be somewhere between the parma and the proline. I think it will be the body I will be using.
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Old 09-18-2002, 01:24 PM   #1478
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Thanks, for the info. on where to get teflon tape... I'll see what my LHS can do for me.

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Old 09-18-2002, 01:25 PM   #1479
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Does anyone know which Corally tire compound is similar (or a little softer) than pink? Are the Corally tires good, wear + grip etc
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Old 09-18-2002, 01:46 PM   #1480
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Kev K:

I don't beileive I havd the chance to meet you, I am from MN and was there on Sat and Sun. I beilieve you or your friend gave me an extra e-clip. I think the use of the corner dots at the oktoberfast race will be minimal, not six at every corner. I just got used to them myself, and now I can't see due to wearing old glasses. It's hard to look at the orange and white stuff to go around, we for me at least. I wish they would get some lower profile ones to lower the "ejection rate" OH well, guess it makes it more challenging. thanks for the e- clip again!

saturday was a bad day of racin' at least I finished the race and got 4th which was 5 positions up from where I qualified. If I would have seen only one of everything and not one big blur I believe i would have been just fine. thanks to that I now have a busted up chassis, but have a back-up. I was wondering: should I get a the six-pack, yokomo, or associated chassis if there is a difference.

Pete Simons

(signed up for mod 1/12th for oktoberfast)
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Old 09-18-2002, 02:18 PM   #1481
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Originally posted by LouisB
Does anyone know which Corally tire compound is similar (or a little softer) than pink? Are the Corally tires good, wear + grip etc
A couple of pages back I posted a link to CRC's site that has a lot of tire info.
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Old 09-18-2002, 05:53 PM   #1482
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Pete...I dont remember where you were sitting but Im sure that we will bump into each other again in a couple weeks. Yeah my car was not soo good on saturday I could not get it to stop oversteering. Then on Sunday I finally got it to work how I liked it and it was very good. I would suggest the 12LC chassis if you can still get it its a little stiffer then most if I remember correctly. If you cant get it any of the other chassis' would do fine. And thats good about the corner dots they were kinda a pain but I got the hang of them but was a rough first couple of packs.
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Old 09-19-2002, 10:40 AM   #1483
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newracer: I found the link to the CRC site and the tire guide, it was helpful but didn't say anything about the Corally compounds. Does anyone use Corally tires or should I go for Jaco/TRC/UFRA??
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Old 09-19-2002, 10:49 AM   #1484
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LouisB, I've used the Ufra's, 45front/40rear on my nitro sedan and the foam is great but the wheels warp very easy.
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Old 09-19-2002, 11:03 AM   #1485
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I use UFRAs on my Pro-10 and I like them. Which colour compounds are softer than pink? I think that something very soft would be what I need for my Corally on carpet, what compound would you reccomend?
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