R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

    Hide Wikipost
Old 10-28-2016, 12:43 PM   -   Wikipost
R/C Tech Forums Thread Wiki: 1/12 forum
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
Last edit by: fenton06
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:


Print Wikipost

Like Tree53Likes
Thread Tools Search this Thread
Old 09-22-2002, 05:32 PM   #1501
Tech Regular
Join Date: Dec 2001
Location: Colorado
Posts: 492
Send a message via AIM to HYDRAMATIC99

my freshly painted speed 8 on my 12L3. Let me know what you think.
Attached Images
File Type: jpg speed81.jpg (43.7 KB, 313 views)
HYDRAMATIC99 is offline   Reply With Quote
Old 09-22-2002, 07:15 PM   #1502
Tech Elite
JimmyMac's Avatar
Join Date: Oct 2001
Location: NC
Posts: 4,434
Trader Rating: 1 (100%+)

Looks pretty Sweet! I still have yet to paint my body for my 12L3. Right now I'm running an old Kyosho body I ran back in the late 80's! Wish I could find another one!
JimmyMac is offline   Reply With Quote
Old 09-22-2002, 09:21 PM   #1503
Tech Master
newracer's Avatar
R/C Tech Charter Subscriber
Join Date: Oct 2001
Location: Timnath, Colorado
Posts: 1,523

Originally posted by HYDRAMATIC99
my freshly painted speed 8 on my 12L3. Let me know what you think.
nice, you going to come scratch it up this weekend? or are you saving it for the carpet?
newracer is offline   Reply With Quote
Old 09-22-2002, 09:48 PM   #1504
Tech Regular
Join Date: Dec 2001
Location: Colorado
Posts: 492
Send a message via AIM to HYDRAMATIC99

Mike, I think I may save it for carpet, but who knows. Maybe I should get a bloody knife for that!

What is a good place to start for gearing a 12L3, for about a 40x70 foot track?
HYDRAMATIC99 is offline   Reply With Quote
Old 09-22-2002, 09:54 PM   #1505
Tech Fanatic
darnold's Avatar
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 939
Trader Rating: 2 (100%+)

kev- Great time this yesterday, your car is running well.

Robk- Your cars is really fast too. Did you go back to Venture today?

Juch's- what did you do today?

RC Nitro- List of 1/12th cars (in no order) Corrally 12G/M, Yokomo YRX 12 (Masami ed), Kawada, Associated 12L3, CRC Carpet Knife, CRC 6 pack, SpeedMerchant Rev.3, Trinity Switchblade Spashett 2002, Pro Tech "Lil dady"(?). Out of these i think if you run mod you will probably really like a Trinity, Associated or Yokomo. The Yokomo is kind of a mix between an Associated and Trinity. Associated is coming out with a new car supposedly within the next 6mos but who knows. The Kawada if it is still sold is a revised Associated. The Rev. 3 and Carpet Knife are awesome cars for stock and i've heard that the Rev. 3 will be getting some revisions but who knows? The six pack in its box stock form is kind of a cross between a Carpet Knife and an Associated but most people when they run mod with it simply take off the side springs and run the tweak screws ala L3 or Switchblade. The Pro-Tech is a unique design that uses ideas found on the Corrally, Switchbalde and L3. The Corrally 12M if i'm not mistaken (and i could be) is getting a few updates that were used at the World's this year. My favorite is the Trinity car.

LouisB- In low grip carpet situations i simply let the traction compond sit for about 30min and re-use the same rears several times. Whites do give a marked edge in traction but many people site that the traction goes away around the 6min mark which is why i stick with the Gray componds. If you were racing asphalt then Yokomo 35's or standard (Jaco, TRC) Pink dots would be the only way to go for the rears. BTW, Corrally use to make Gold and Silver dot tires with the Gold being the softer of the two and i suppose similar to a white dot while the silvers were i think would be similar to a gray dot. i think they are actually Yokomo rubber but not the Yokomo 35's that Masami ran at the Worlds this year which is suppose to be a gas tire.

Hydra- 64 pitch is normally used in 12th scale and for the size track you discribed try: Stock Motor = 29/100 with 1.90" rear tire. Modified Motor = what turn?? For modified motor gearing see some of the past post between 20-43.

Raffe- So how did the Yokomo body run and were its characteristics like you thought?

Petenis- Have you replaced the chassis and with what? i plan on being up there next Wed evening for Oktoberfast, will there be practice or will the track be closed for setup? Your brother said his Trinity is working much better how is he doing?

Everyone- For lots of setup, tire traction application, and build quality tips everyone new may want to revisit or see pages 19-43 of this thread because guys posted tons of stuff. Let us know if this stuff helps.
darnold is offline   Reply With Quote
Old 09-22-2002, 09:58 PM   #1506
Tech Fanatic
darnold's Avatar
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 939
Trader Rating: 2 (100%+)

Yuk- grammar, spelling are ugly. Thanks to Juch's, Robk, Timmy H., and the rest of the gang with us running our toy cars i'm running on about 3hrs sleep and it's time to go to bed. LOL!!!!
darnold is offline   Reply With Quote
Old 09-22-2002, 10:16 PM   #1507
Tech Master
newracer's Avatar
R/C Tech Charter Subscriber
Join Date: Oct 2001
Location: Timnath, Colorado
Posts: 1,523

I think you ment Pro Parts Junior.

Hydramatic99- I have been gearing my car around 28/96 when the tires are new.
newracer is offline   Reply With Quote
Old 09-23-2002, 03:22 AM   #1508
Tech Regular
RC Nitro's Avatar
Join Date: Mar 2002
Location: NN Virginia
Posts: 432

darnould: Thanks very much for the list. I will show this to my buds saturday. Not sure if we will run 4 or 6 cell. I want to run stock to start with, no mod motors Thanks again for the info.
RC Nitro is offline   Reply With Quote
Old 09-23-2002, 06:13 AM   #1509
Tech Master
Join Date: Feb 2002
Location: Savage, Mn
Posts: 1,001
Trader Rating: 24 (100%+)
Post Dave Arnold

practice starts at 8:00 a.m. thursday for OctoberFast, Wed, we are going the track setup and the final prep for the race. There may be a few factory guys hanging out working on their stuff.
Jeff Ford is offline   Reply With Quote
Old 09-23-2002, 07:57 AM   #1510
Tech Regular
LouisB's Avatar
Join Date: Jun 2002
Location: Guernsey, UK
Posts: 404

Thanks for the info darnold, I might order a set of silver and gold rears
LouisB is offline   Reply With Quote
Old 09-23-2002, 02:51 PM   #1511
Tech Apprentice
Stevie's Avatar
Join Date: Jul 2002
Location: england/NOTTS
Posts: 85

for Corally tyres,i use Gold rears with silver fronts,seems to be the most popular with Corally Drivers,gold rears & gold fronts are o.k has well,if you want more life out of your tyres then try silver rears,like i say the most popular for carpet is gold/silver rears with silver fronts.i think for out doors people use Green rear tyres,
Also if you check out the uk corally site,they have a part all about 1/12th corally tyres...
Stevie is offline   Reply With Quote
Old 09-23-2002, 02:57 PM   #1512
Tech Apprentice
Stevie's Avatar
Join Date: Jul 2002
Location: england/NOTTS
Posts: 85

Stevie is offline   Reply With Quote
Old 09-23-2002, 04:22 PM   #1513
Tech Champion
Kevin K's Avatar
Join Date: Aug 2001
Location: In a land of mini-mighty mental giants
Posts: 8,822
Trader Rating: 32 (100%+)
Send a message via AIM to Kevin K Send a message via Yahoo to Kevin K

Tigger.....its was fun on saturday especialy when the kids were running and racing backwards on the track that was the best ever. Anyway are you going to get a taxi now after driving my car ? Are you practicing anywhere this weekend?
2013 USVTA World Champion of the World
MOTIV RC presents the Midwest All-Star Carpet Series....15th year running 2017/18!!!
USVTA National Championship....check it out!!!
Im only responsible for what I say NOT what you understand.
Kevin K is offline   Reply With Quote
Old 09-23-2002, 05:16 PM   #1514
Tech Apprentice
Join Date: Sep 2002
Posts: 69
Default brushes and springs

I was just wondering what brushes and springs to use for 1/12 scale mod 8- 10 turns?Im sure you need a light spring but how light to you need green, blue?

And what brushes does everyone use just a standard full quasar brush,or does anyone use cut brushes anymore?

TRL is offline   Reply With Quote
Old 09-23-2002, 10:16 PM   #1515
Tech Fanatic
darnold's Avatar
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 939
Trader Rating: 2 (100%+)

Kev- Yeah, hmmm i had a fun time too and was talking to Rob about us all going up to Venture again this Saturday and practicing again. Concerning the TC i'm not looking at it for right now because of all of the stuff on my plate at the moment. However, maybe in Jan. i will get a used TC3 or Losi and play with it once a month but it wouldn't be more than that. Looks like we will have some mod 12th going throughout the year since Randy plans on going to mod around Jan. and Timmy may be doing some on the club level throughout the year along with Juch's. The guys that will be at Pat's race track also like to do mod so it may not be lonely this season for 12th mod, let's hope not.
darnold is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
New to the forum mig rod Electric Off-Road 1 01-05-2008 04:23 PM
hi i need help and im new to the forum racer4 Rookie Zone 4 01-21-2007 01:37 PM
Why is this forum listed under the On Road Forum? sport10 Onroad Nitro Engine Zone 0 01-11-2007 07:06 AM
Forum Changes... futureal Wisconsin & Illinois Racing 3 10-28-2002 08:26 PM

Currently Active Users Viewing This Thread: 2 (1 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

All times are GMT -7. It is currently 02:28 AM.

Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net