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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 05-22-2014, 06:59 PM   #40711
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Ulti 1/12 tires are available at TQ.
http://www.tqrcracing.com/shop/produ...s_maker_id=102


FYI, Thanks.
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Old 05-23-2014, 04:54 AM   #40712
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Hello guys,

In past years I gathered many experience in different classes like 1/10 and 1/8 nitro, 1/10TC electric but Iím totally new to 1/12 scale. Since in my neighborhood a permanent indoor track opened recently thatís perfectly suited for 1/12 and a little too small for 1/10TC I decided to give it a go.

Iím interested in Ö

- Which chassis: looking into AE RC12R5.2, S120LTX, VBC Lightning12, Yokomo R12C3, Xray X12 maybe something else? (my question is NOT which is the best chassis but how do they compare technically are there any differences since they look pretty same to me, what are the trends in 12th scale and so on. Maybe how they behave to set-up changes, how the material quality is, any driving behavior issues Ö more stuff like that.

- What are the best servos, 1s ESCís, 1s LiPoís, tires, bodyís.

Iím a technic freak and like the top stuff also money isnít a concern!

The source of information her is enormous and Iím looking for a page where I can find it more Ďícompressedíí or organized or maybe someone can point me to a page here on this forum!? Itís just too much to read everything here. Also looking for some sort of set-up guide if it exists!

Thanks for all your help!

Regards. Lojz
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Old 05-23-2014, 05:35 AM   #40713
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12th Scale Racing is Alive and Well in So Cal

Click on the above link which will help answer some of your above questions.
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Old 05-25-2014, 08:02 PM   #40714
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Over the past the weekend, I had the amazing opportunity to race at the 1/12 All Japan Nationals warmup race. All of the top Japanese drivers were there in attendance from Yokomo, Kyosho, CRC, ect.

This was my first time to such a large 1/12 event with such high profile drivers. The two day event was situated in a gymnasium. The carpet that was used wasn't CRC, but rather a company called "Perfect Carpet", I've never heard of it before. However, it worked out quite nicely and offered consistent traction through the race weekend. The track design was quite tight and twisty (see video) which favoured some drivers -Naoto " this is my kind of track, I love tacks like this". Yes, I spoke with the world champion . We had many conversations about his life, who he looks up to as a role model, his favourite rc driver, ect, ect.

So, as previously mentioned this was my first time racing at an event such as this. The hilarious part is, I was told by my hobby shop owner that this was a "small event" and "not to worry about bringing everything". So, I listened to his words and causally prepared the night before for this event. Heck, I didn't even bring a pit towel, extra tires, or even bring a setup board. Well, it couldn't be helped with the setup board, because I left it on my pit table at the hobby shop. So, when I arrived at the event all I could see was pit tables decked out to the nines and here's me using a wobbly table as my pit space and setup board. Lol. You live, you learn.

There was two racing classes, modified and stock. Modified raced in a clockwise direction, and stock counterclockwise. I'm not to sure as to why they did this? Any thoughts?

Modified was fast, really, really fast. Everyone was running 3.5 motors from companies like Yokomo, Trinity, Gstyle,Trione, Kyosho. The stock racing class we're running similar motors, however the motor of choice was GStyle 21.5 with a 14.0 rotor! Maximum torque! I came to the track with a Trinity, ORCA, and they didn't seem to have the rip I needed for this course. Luckily I had a Gstyle motor, but the rotor was 12.4 which offered lots of rpm but, not enough rip through the infield. I politely asked the owner to put in a rotor for me, which he was nice enough to do. Now, I'm on the same playing field motor wise. Driving is a whole other story.

I won't bore you with anymore writing, but I'll post something a little later on. I'll post some pictures for you guys and some video too!

A1 final http://m.youtube.com/watch?v=1CK9bXDkyoE

The tight chicane http://m.youtube.com/watch?feature=y...&v=ENYW_CNqNOA

Last edited by EDWARD2003; 05-25-2014 at 08:47 PM.
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Old 05-25-2014, 08:24 PM   #40715
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Naoto's winning car. Can you spot the modification?
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Old 05-25-2014, 10:12 PM   #40716
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Quote:
Originally Posted by EDWARD2003 View Post
Naoto's winning car. Can you spot the modification?
whats going on with the side dampener ?? is it even mounted.......
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Old 05-25-2014, 10:27 PM   #40717
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Looks like it has the side shock like an 12r5.1
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Old 05-25-2014, 10:32 PM   #40718
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It looks like he's using 2 of the front mini dampers. You can see one where it mounts to the cross bar on the right side of the car...and note the 2 screws to the left and right of where the shock mounts to the upper pod plate.
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Old 05-25-2014, 11:00 PM   #40719
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Yes, you're right. Naoto is using the mini front dampers on the rear. I spoke with him and he said "the left and right side motion of the side shock damper is not consistent, and is difficult to setup properly." So, they've opted for damper tubes. The front springs on his car are yokomo yellow, which is quite soft, but the traction was low at this event.

He's also running the new Yokomo ESC and motor.

Last edited by EDWARD2003; 05-27-2014 at 05:38 PM.
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Old 05-26-2014, 01:03 AM   #40720
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Nice share Edward2003


Just curious, is there any racer (or perhaps a TRF's team) who used Tamiya RM-01X ?

If yes, did they reach into the A-Main Finale ?
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Old 05-26-2014, 01:51 AM   #40721
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This picture should answer your question. Yokomo 1,2,3. There were no Tamiya's.

I can't seem to correct the sideways photos, sorry.
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Last edited by EDWARD2003; 05-26-2014 at 02:04 AM.
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Old 05-26-2014, 04:01 AM   #40722
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I see.

Thanks for sharing. I appreciate it a lot.

I am just wondering whether Tamiya would begin to compete in 12th scale, especially considering that they released RM-01X in the market since early 2013.
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Old 05-26-2014, 06:10 AM   #40723
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Damper tubes up close.
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Old 05-26-2014, 06:13 AM   #40724
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Rear picture of damper tubes
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Old 05-26-2014, 06:15 AM   #40725
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Team Bomber http://www.teambomber.jp/

This kit will allow you to convert earlier R12's or the current C3 to a side damper tube setup. This setup was offered way before Naoto's current side tube setup. This company also offers many other products, such as tires, bodies and other R12 bit's and pieces.
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Last edited by EDWARD2003; 05-27-2014 at 06:05 PM.
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