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Old 2018.02.14, 06:52 PM   #1
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New 2wd chassis' on the market

So, Ive been away from the hobby for a little while. I am getting back into RC, and dont see much discussion here about the new 1/28 scale 2wd chassis' that are on the scene. So lets talk...

First, I want to mention my view on a few things. My opinion is that 2S LiPo is too fast for any brushed motor in a 2wd chassis. The motor wear is very high at 7.4v for extended use, and the motor will be damaged after a few race nights. Brushless, 2S can be suitable with a 3500kv motor, but anything more on RCP would be too fast. On carpet, more motor can be used, 5000kv should be usable. 1S would be a more ideal power solution for 1/28 scale racing with existing brushed motors, and brushless, but there are very few brushless ESCs that have internal voltage boosters to raise voltage for the receiver and servo.

Jomurema JR128-R01 $170 standard, and $250 pro
This recently popped up on Kenon, and is a 1s LiPo brushed RTR. It uses a FS-GT2 / 2.4 GHz digital proportional Radio Transmitter. The ESC has a voltage booster to raise the voltage for the servo. It comes equipped with bearings, PN ball differential, and has a 40t 130 brushed motor limit.

It uses pull rod single a-arm front suspension, with a gimbal style rear suspension

I think this would be an ideal car for an entry class to get people into the hobby. Speed would be controllable from a power standpoint with 1s power, and the price looks good to recommend for new racers trying to get their feet wet. It looks like the Pro model that has aluminum chassis, adjustable side shocks to adjust tweak and alu motormount. It doesnt look like there differences in electronics between the standard and the pro.

If the plan is to upgrade to brushless, or use 2S LiPo, I am not sure if this would be the ideal choice since you will basically be swapping all of the electronics and radio. The Pro looks like a very good value for a race ready car out of the box, as long as the balance of power in the class is appropriate.

It comes with a body, but looks like it would need an adapter kit to accept ASC bodies. Which is a minus for racing with the ASC bodies, but if a class is run as a spec sportsman class, it could be used to increase growth in the scale.

GL Racinging GLR $180 chassis with servo/BL ESC
With similar style to a 1/12 pan car, a ball pivot with side link rear suspension. Front suspension is similar to the MR03. The car is designed for 2S LiPo brushless. I think a 1S sensored ESC with voltage booster would be more suitable for this scale.

The car looks clean, and is designed around brushless use. It can accept ASC bodies more easily by using their standard front body clips, and can use lexan bodies with posts and pins...

Link cars traditionally havent worked as well on RCP due to the bumpy nature of the track. Being 2s powered, I feel that it might be too much power for an average driver with more than 3500kv motors.

Atomic 2WD has yet to be released, they have made an announcement with a silhouette image on their social media site... It looks like a ball pivot/side link car as well.

Lets have a discussion, if anyone has tried these cars, and what do you feel about them. What do you feel about power vs motor in your club? What would you run?

I am happy to see new chassis' available, to give some competition to Kyosho... however, I feel that the push to 2s power is too much for the current motors on the market for close racing. I feel that only the Jomurema car can race directly with the AAA Mini-Z, since it is 1S, and a motor balance would be needed to ensure similar speeds. Like AAA 70t and 1S 60t...

Lets discuss it
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Last edited by EMU; 2018.02.14 at 06:57 PM.
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Old 2018.02.15, 06:56 AM   #2
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With aftermarket platforms in commercial production, we are finally at a point where the scale is no longer 'Kyosho Mini-Z' but more of a true 1:28 scale with many options from several manufacturers and explosion of home grown/engineered 3d print jobs. We may see a shift in what is generally considered 'Mini-Z' racing away from the actual Mini-Z. Lexan bodies, pan car style chassis, etc. aren't my cup of tea and but for many, it's something they are familiar with already and likely to replace many 'Mini-Z' classes moving forward.

Very exciting times for the scale! Thanks for the brief summary of the options. I don't dabble in anything other than AAA so it's always nice to read up on these reviews of what's out there. One day...
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Old 2018.02.15, 12:02 PM   #3
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The thing with 1/28 racing, is that there needs to be a common ground between the cars. Race organizers will need to decide whether these cars are suitable to be raced with the existing mini-z class structure, and what adjustments will be needed moving forward.

As you can see in the above post, I am in favor of 1s operation of Lipo, but don't care for 2s because its simply too fast for racing anything but modified classes. With the majority of new chassis being designed for Lipo only, the electronics now are becoming more limiting in choice of power...

I personally prefer that asc hard bodies would be used in everything but perhaps a prototype or modified class. These bodies are what drew many people to this scale.
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Old 2018.02.15, 01:13 PM   #4
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Thatís going to be a tough long slog to get that done. Iíve been trying to get a common core set of rules going for the better part of a decade and it always ends up in shouting down other for this or that.

Iím sticking to autoscales myself as well. The scale beauty is what got me hooked, not the speed, widgets, gadgets or what have you. I personally find pan classes boring aesthetics. Itís all of a very few styles almost all done in the same shredded or torn pain style. Thatís just me though, Iím sure most probably donít care.
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Old 2018.02.15, 03:21 PM   #5
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With the routes that Kyosho has been taking with thme electronics, switching bands and requiring a different transmitter for some, there is no single transmitter that can operate ASF, MHS and FHS (I hope I got all of the acronyms correct). This becomes a barrier of entry for anyone that currently races other scales and might think about racing in this scale. The Kyosho electronics are confusing to newcomers, and require greater investment by larger scale racers looking to build a car to race. Requiring a new radio just for a mini-z.

The mini-z has been a great platform for racing, and great for hop up manufacturers due to its modularity. As racers we can use one companies front end, with another's rear... with the introduction of manufacturer chassis, we will lose some of that cross compatibility.

In general, I think we are looking more towards a move towards 1/28 scale racing... but the fundamentals of the class structures need to be laid out. Maybe this is discussion for a different thread?

On a side note, it looks like much of this scale conversation has gone the way of social media, with little to no paper trail on the information shared... the beauty of a forum is its searchability. I have been off ant form of social media for years.
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Old 2018.02.15, 04:01 PM   #6
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From what I understand from some FB pages I follow not only is "mini-z" outdated in ability but in Mod classes the go-to chassis is AWD-TC.

I don't have any experience with the newer generation of aftermarket "Mini-12ths" (as I like to call them) and probably never will. I feel that at 7.4 volt that these cars are getting too light and fast for my skill level.

I'm very much in agreement that these chassis should be run 1S, if only to give me an opportunity to use them without being overwhelmed by their pace.


I'd imagine there'd have to be a new class structure made for 1S li-po....good luck getting agreement for that.
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Old 2018.02.15, 10:30 PM   #7
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Imo... 2s LiPo it 2s2p LiOn on rcp is the way to go... Is it harder to drive? Yes it is....can you get used to it? Yes you can.... 3500kv @100% is capable of getting near lap record times of a 7500kv @70%... In my hands.....
2s2p LiOn 3500kv is really similar to 50t bb NiMh
2s2p LiOn 5500kv is similar to 33t Nimh
2s2p LiOn 7500kv Is the next level of racing.... Hahahaha
As far as 4wd VS 2wd?... 4wd is fast and capable... At the WC level.... The 4wd has won on low grip tracks... And the 2wd has won on high grip tracks 4wd does not suit my banzai driving style... And I agree with emu that sidelink cars don't seem to work as well on rcp... And pretty much anything works on carpet..... HahahahaAnd I have spent a lot of time in the past few years trying and testing to find the next level and currently working on a GM spec set up for the Austria car.... As a base car it is really good... I have tested both std and pro kits.., and I the process of building a hybrid of both... And running on 2s Lipo brushless 5500kv
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