R/C Tech Forums

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

    Hide Wikipost
Old 10-24-2016, 08:36 AM   -   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: Skiddins
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!


Print Wikipost

Thread Tools Search this Thread
Old 03-28-2006, 01:22 PM   #17911
Tech Elite
Mason's Avatar
Join Date: Oct 2004
Location: Ocala, Florida
Posts: 4,526

are you running 2 minute races?
Mason McCombs
NewRed Hobbies & Indoor Facility
Off-Road, Dirt Oval, Crawlers & Pullers
Mason is offline   Reply With Quote
Old 03-28-2006, 06:18 PM   #17912
Tech Initiate
Join Date: Oct 2005
Posts: 49

What is a good setup for a CO27 carpet?

Fast Faisal
Fast Faisal is offline   Reply With Quote
Old 03-28-2006, 06:31 PM   #17913
Tech Adept
B&B Racing's Avatar
Join Date: Jan 2006
Location: Midwest
Posts: 182
Trader Rating: 2 (100%+)
Send a message via AIM to B&B Racing

Chassis and tires like 19-turn. Rool-out around 1.85.
Sponsered by BJ & Z Hobbies.
B&B Racing is offline   Reply With Quote
Old 03-28-2006, 07:10 PM   #17914
Tech Adept
Sokool's Avatar
Join Date: May 2005
Location: Sarasota, FL
Posts: 109
Send a message via AIM to Sokool Send a message via Yahoo to Sokool


I was think touring car stuff DOH I run around 1.85-1.9 rollout

Anyway thanks again for your help.
Sokool is offline   Reply With Quote
Old 03-28-2006, 07:44 PM   #17915
Tech Elite
Join Date: Oct 2003
Location: Green Bay,WI
Posts: 3,006
Trader Rating: 1 (100%+)
Send a message via AIM to R/C Anonymous

Originally Posted by Fast Faisal
What is a good setup for a CO27 carpet?

Fast Faisal
I've been running my CO27 with trimmed XXX brushes in my 12th and it does pretty good.
Geoff C.
R/C Anonymous is offline   Reply With Quote
Old 03-29-2006, 03:46 AM   #17916
Tech Apprentice
kawada's Avatar
Join Date: Dec 2003
Posts: 63

Excuse me pal ..

Mmmmmm ... may i know where can i get an Oval body for my L4 ??

Thx in advance
kawada is offline   Reply With Quote
Old 03-29-2006, 04:41 PM   #17917
Tech Elite
andrewdoherty's Avatar
Join Date: Jan 2005
Location: ★Wylie, TX★
Posts: 3,763
Trader Rating: 47 (100%+)

Originally Posted by theisgroup
hey man,

run a 96 spur.
you can chop down the nut and the screw and the tbar. should be ab le to squeeze a 35 into the car.
the fdr of a 1/12 is 1:1 it is direct drive. so we use roll out. tire size is how we control speed.
this weekend J and I ran 31 with 46mm tire and tim ran 34 with 44mm I think
to set toe, Tim tells me to put pressure on the back of the wheel before we check it. just use one of those hudy sheet that most have on the pit board. and set about .5 to 1 degree toe in.
on Mike's track we do not change the battery location much in an L4, just shoe goo the things pointing toward the rear. you can always pull them off if you need to move them up for mod.
you may want to run a 100 spur if you want more top end, but then we usually run 2 screws to get the motor far enough forward.

Just to make sure . . . you are saying to mount the battery trays so that the batteries are shifted back, correct? And when you said you usually run two screws you are referring to the t-bar mounting screws, correct? Thanks for the help yang.
"Whether you think you can, or think you can't, you're right." -Henry Ford
"[Driving] Genius is 1% inspiration, and 99% perspiration" -T.A. Edison
|◤ReflexRacing.net◢|◤Gravity R/C◢|◤HWNA◢|◤AVID R/C◢|
andrewdoherty is offline   Reply With Quote
Old 03-29-2006, 04:56 PM   #17918
Tech Elite
theisgroup's Avatar
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)

yes batteries back.

I don't run 2 screw, but this past weekend, tim J and I all ran a 2 screw setup in 19turn. But Tim was the only one that was running a 34-35 which require more room. I had a 31 and that was ok even with the third screw in there.
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE
theisgroup is offline   Reply With Quote
Old 03-29-2006, 05:51 PM   #17919
Tech Master
CarlosG.'s Avatar
Join Date: Jul 2004
Location: Falls City,TX
Posts: 1,145
Trader Rating: 12 (100%+)
Send a message via Yahoo to CarlosG.

I ran the 3 screw set up as well this last weekend.
CarlosG. is offline   Reply With Quote
Old 03-29-2006, 06:14 PM   #17920
Tech Master
Three's Avatar
Join Date: Feb 2005
Location: Madphis, Tn.
Posts: 1,450

Try RC4Less, LefthanderRC, Jake's Performance Hobbies, or MurdockRC.
I believe that Aero1 produces a Dodge Charger and McAllister does a Monte Carlo.
Three is offline   Reply With Quote
Old 03-30-2006, 06:52 AM   #17921
Tech Master
billjacobs's Avatar
Join Date: Sep 2004
Location: Rockville, MD
Posts: 1,244
Trader Rating: 50 (100%+)
Default 1/12 servos and esc for sale

I have a futaba 9650, Ko 947, and an LRP QC2 for sale. All in excellent condition.

many hi-end servos, receivers, and speedos
billjacobs is offline   Reply With Quote
Old 03-30-2006, 07:59 AM   #17922
Tech Addict
James35's Avatar
Join Date: Nov 2005
Location: Rochester, New York
Posts: 748
Trader Rating: 1 (100%+)

This is the wrong forum to post for sale items (or references to them). With 113 posts, you should know better.
James35 is offline   Reply With Quote
Old 03-30-2006, 01:47 PM   #17923
Tech Elite
RaceAce701's Avatar
Join Date: Jan 2006
Location: Carbondale, Pa
Posts: 2,837
Trader Rating: 82 (99%+)

post removed due to spam

Last edited by Speedo; 03-30-2006 at 05:40 PM.
RaceAce701 is offline   Reply With Quote
Old 03-30-2006, 03:30 PM   #17924
Tech Elite
bigb11's Avatar
Join Date: Jan 2006
Posts: 3,126
Trader Rating: 59 (100%+)
Send a message via AIM to bigb11

Can anybody help me, I have a Trinity Reflex12 oval and it needs to be stiffer, the chassis flexes to much. any one have any ideas.
bigb11 is offline   Reply With Quote
Old 03-30-2006, 06:54 PM   #17925
Tech Elite
Mason's Avatar
Join Date: Oct 2004
Location: Ocala, Florida
Posts: 4,526

Where can I get 2-56 ball studs in "bulk" .. ie not 2 to a pkg.
Mason McCombs
NewRed Hobbies & Indoor Facility
Off-Road, Dirt Oval, Crawlers & Pullers
Mason 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: 3 (1 members and 2 guests)
Peter Martin
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 03:58 PM.

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

SEO by vBSEO 3.5.0