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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.

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

TIRES:
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!

THIS MAY NEED UPDATING FOR THE NEW BLACK CRC CARPET

Brands:
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:
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:
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.

Examples:
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:
BSR/CRC/Jaco



Contact



Corally



JFT (Japan Foam Tire)



Ulti



Enneti (Xceed)



ELECTRONICS:
ESC:
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 decide to use an Rx pack, MAKE SURE TO REMOVE THE RED WIRE FROM THE ESC PLUG THAT GOES INTO THE RECEIVER!!!

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.

1S ESC:
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!
Servos:
BODIES:
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


PROTOForm:

Reflex Racing/RSD:

SUSPENSION ADJUSTMENTS:

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Old 07-19-2005, 10:02 PM   #13696
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Got tangled up at the start (mainly my fault), but I was the only one to end up in the board. 8 seconds later I got marshalled. Pushed really hard for 7 minutes, but the leader (edseb on this thread) didn't make any mistakes. I was about 1.5 seconds behind at the end.
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Old 07-19-2005, 10:11 PM   #13697
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Quote:
Originally Posted by odpurple
One problem with RC Tech is that they don't spray, so the bite may not be good for 1/12th.
Those 4x4 boards aren't very forgiving either...he, he...But, we could agree to do a trial night boys?!?
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Old 07-19-2005, 10:12 PM   #13698
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By the way, it was a very good race with a great layout. Intermountain raceway did a great job. I'll go back and race there anytime.

results:
http://home.comcast.net/~queball1/Mains_07-16-2005.htm
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Old 07-19-2005, 10:28 PM   #13699
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Quote:
Originally Posted by JRX-S Bill
Those 4x4 boards aren't very forgiving either...he, he...But, we could agree to do a trial night boys?!?
not without something on the track for bite
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Old 07-19-2005, 10:36 PM   #13700
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Quote:
Originally Posted by bigtez
Can anyone help me? Please?
1. between stock and mod you'll need from 24 to 31
2. they would need to have 8 or 12 holes in the right diameter circle for the diff.
3. there's a listing for TRC tires on the Trinity website with colors listed in order of thier shore rating. Most manufacturers are approximately the same, but some vary more than others. Also tires of the same shore may not have the same bite on a particular surface. this link goes to the touring tires where they list the shore: http://www.teamtrinity.com/touring/touring_tires.html
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Old 07-20-2005, 01:19 AM   #13701
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Quote:
Originally Posted by Kevin K
I know that some of you guys in here have been looking for some of the "wrap" style of tires. Well TM Racing Tires have just released their wrap tires. They are going to offer them in both front and rear tires and right now are available in Purple and Magenta compounds for the front and Gray and Pink compounds for the rear....with more compounds to follow or can be made at a request. These tires are great as they give you more forward bite and free up the car on higher bit situations. Another side effect is that they tend to last a little longer then a non-wrap tire. So if you are looking for some and cant locate them give TM a try. Here is the website for the contact info as they are not listed on the website yet. http://www.tm-rc-racingcomponents.com/
don't see any reference to wrap style tires, guess i will try to contact them. any posts / more info on these

there was a post about Jaco 2-stage tires a few days back....guess they are the same thing/idea.

Jack Rimer (Jaco?) just started a "Jaco 2-stage tires" for nitro sedans in the "Nitro Forum". i posted a Q about whether they have them for 12th cars

Last edited by fast-ho-cars; 07-20-2005 at 01:57 AM.
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Old 07-20-2005, 01:26 AM   #13702
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I know Josh Cyrul carries them or did at his track Halo Hobbies... might contact him.

I got several sets from him at the Norrca Nats last year at his track.

They just have a lighter inside foam and then the normal foam on top. If you cut them pretty small like 1.75-1.8 they weigh half of a normal pink or dbl pink tire. They usually run them in mod 12th.

hope that helps

Michael Skeen
Thunder RC
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Old 07-20-2005, 01:43 AM   #13703
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is there a website for halo hobbies? search engine on msn didn't come up with one
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Old 07-20-2005, 06:34 AM   #13704
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I was just wondering the best place online to buy 1/12th scale tyres, preferably Jaco's. Every site i've found doesn't have anything useful in stock. I'm after purple fronts and pink rears.
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Old 07-20-2005, 08:22 AM   #13705
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well... www.cefx.net is Josh's website, not sure if he ever got any info about his track on there yet though. Check in the Racing Forum on here. It should have a thread for halo hobbies...
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Old 07-20-2005, 09:02 AM   #13706
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Quote:
Originally Posted by pyrosian
I was just wondering the best place online to buy 1/12th scale tyres, preferably Jaco's. Every site i've found doesn't have anything useful in stock. I'm after purple fronts and pink rears.
Try Kraig at KT Hobbies.

http://www.kthobbies.com/shop/
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Old 07-20-2005, 09:08 AM   #13707
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Does nayone know where you can purchase the new Jaco wrapped tires for 12th scale?
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Old 07-20-2005, 09:14 AM   #13708
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Quote:
Originally Posted by fast-ho-cars
don't see any reference to wrap style tires, guess i will try to contact them. any posts / more info on these

there was a post about Jaco 2-stage tires a few days back....guess they are the same thing/idea.

Jack Rimer (Jaco?) just started a "Jaco 2-stage tires" for nitro sedans in the "Nitro Forum". i posted a Q about whether they have them for 12th cars
Yeah they are not listed on the website yet. Just drop them a line from the contact info on the site. The TM wrap tires are a dual layer tire with an inner core that is not the same as the outer core. For me when I use them they are faster and the car is easier to drive mod or stock. I have only used them on carpet so I dont know how well they work on asphalt.
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Old 07-20-2005, 09:22 AM   #13709
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Kevin K,

What compounds were you using on carpet?
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Old 07-20-2005, 09:27 AM   #13710
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On carpet I've ran Purple fronts and Gray rears in stock/19t and Magenta fronts and Pink rears in stock/19t and mod. All around most times I ran the Magenta fronts and Pink rears....some times I would go to a purple front when the grip level was lower.
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