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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 07-28-2003, 09:24 AM   #3526
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Everything is back to normal!!! They just vented off their frustrations the way the Armed forces is being ran!!! They did that by planting C4 explosives and taking over the hotel!! so they could be heard!!! they are back to barracks now and will be dealt with! good there was no gunfight!!
Thanks for asking!!
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Old 07-29-2003, 01:57 AM   #3527
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Default news from japan

KAWADA released two option parts for their M300.

1) SSG chassis

2) Delrin friction plate

Shooter released many option parts for RC12L3

3) See following japanese page you can see pics.
Kimihiko Yano
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Old 07-29-2003, 07:21 AM   #3528
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I know whe talked about this before, but what sized capasitors do you use on the reciever? I also take that you just put the positive to the pos and neg to the neg and plug it into the reciever batt slot correct? Thanks.
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Old 07-31-2003, 12:19 PM   #3529
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So how many of you have been running your 1/12 scale cars during the spring and summer?
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Old 07-31-2003, 12:25 PM   #3530
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Originally posted by davidl
So how many of you have been running your 1/12 scale cars during the spring and summer?
Since the track I race at is in doors.... to answer your question. Yes.
AE 12R5.2 (x2) - TC7 - M05 - M05V2R

People who don't have to wait for the latest item, should not tell those that do, that "It's worth the wait"
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Old 07-31-2003, 02:17 PM   #3531
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Unfortunately everyone around here runs outside at the first sight of warm sunshine while screaming "Nitro" at the top of their lungs. So for the spring/summer months I get to listen to people tell me how "fast" nitro is while their car has yet to finish a race because it isnt "tuned" right.

Ahhh the joys of summer time
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Old 07-31-2003, 03:59 PM   #3532
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Originally posted by Scrad
I know whe talked about this before, but what sized capasitors do you use on the reciever? I also take that you just put the positive to the pos and neg to the neg and plug it into the reciever batt slot correct? Thanks.
i was wondering the same thing. i found some guys are running 10v 4700 uf caps for 6 cell touring cars. i am using a 10v 2200 uf cap on my xxxs. does anyone know if you would need to use different size caps for 1/12th scale 4 cell? and if you wired 2 caps in parrallel this would double the capacity correct?

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Old 08-01-2003, 06:34 AM   #3533
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Originally posted by davidl
So how many of you have been running your 1/12 scale cars during the spring and summer?
I raced my 12th scale outside once.
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Old 08-01-2003, 07:17 AM   #3534
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We race 12th scale both indoors and out all summer long. We are lucky to have a local carpet track to run on, and our florida state series has a 12th scale class, so we end up running outside too. The last two outdoor tracks were rough on the 12th scale cars.

Clean Title & Escrow|p3|TRF|Tamiya|SerpentAmerica|FSEARA|Team Butter|RC 3|Munno |RCTECH #29|EAMotorsports|BMI|Novak|SpeedPassion|RadioPost
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Old 08-01-2003, 11:09 AM   #3535
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Default Traction Compound

What are people running that is comparable to or better than Paragon?

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Old 08-01-2003, 11:49 AM   #3536
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Jack the gripper. IT lasts as long or longer than Paragon. It also doesnt gum up your tires like The TQ stuff does. And after the race is done-it evaporates totally and tires feel dry.
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Old 08-01-2003, 12:24 PM   #3537
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rayhuang could you tell me how you have been treating your tires with TC2 compared with say TC1 or TC3 (paragon) as we in england have just chnaged oevr to odourkess, and the 12th season is soon aproaching, and none of us know how to use this TC2!!!!!

could you comment on
when to treat rears
when to treat fronts
amount of traction produced


we were treatin our tires like this before
rears soke about 45 mins
fronts about 20 mins
wipe off 5 mins before race

matt rice
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Old 08-01-2003, 03:50 PM   #3538
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Default Racing in the summer

I wish. I practice with my CK at the local track at wall mart every week. they run 1/10 gas and electric TCs. I run a 1/10 PAN against the TCs. They do have a 1/12 class, but I am the only one that brings one. Bummer.

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Old 08-02-2003, 12:59 AM   #3539
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Hey David L,

We have been racing in Cleveland twice a month during the summer on carpet with 40-50 entries every time on a Tuesday night!!! A lot of people plan to make it up for Aug 12. I know Mo, and Mike Blackstock will be there and last time Ray Darroch showed up and said he would be back. See if you can make the trip. If not you'll have to get up our way in the winter. We would love to have you.

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Old 08-02-2003, 09:00 AM   #3540
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Paul - will you be in the office on Monday? I need to talk with you.
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