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Old 08-23-2019, 02:15 AM
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https://www.thercracer.com/2019/09/4...rst-photo.html

1/10 R/C TRF420 Chassis Kit

Tamiya is delighted to present an eagerly awaited new TRF touring car chassis – the TRF420!
Our design team have come up with a host of brand new parts designs that ensure this racing chassis takes the TRF Series of products to a different level.
Get your hands on the TRF420 and get racing!

About the Model
  • This is a 1/10 scale 4WD R/C touring car chassis model assembly kit.
  • 2 belt-driven 4WD drivetrain utilizes rear gear differential and front/center direct pulley. New gear diff pulley and case parts not only provide a weight savings of 1.5g, but also promise even less oil leakage.
  • Front direct pulley and direct holder are an integrated plastic part for a weight savings of 2g compared to separate parts used on previous chassis. Direct cups are screw-attached, allowing their replacement without the need to remove the direct pulley component.
  • New double cardan universal shafts bring stable corners and next-level speed.
  • Employs a carbon fiber double-deck frame (2mm thickness upper and 2.25mm lower decks) for just the right balance of flex characteristics.
  • Features brand new designs for suspension arms, which use bushing inserts to allow different lever ratios. Rear arms are 3mm offset to the rear, allowing a shorter lower deck and increased traction.
  • The new adjustable suspension mounts and plastic bushings are employed – changing the bushings allows a huge range of toe, roll center and caster angle settings.
  • An updated steering linkage is now paired with a new steering pivot component, for easy tweaks to the
  • steering setup.
  • Bearing holders (on gear diff and front direct pulley) were redesigned to provide even more precise location and a super-smooth drivetrain.
  • The bumper design has been altered so as not to impact upon the chassis' roll characteristics.
  • New body mounts are 2mm offset; change their attachment position for different body mount location and fine tuning of your car's center of balance.
  • Lightweight wheel axles weigh approximately 1.5g less than predecessors and allow a choice between clip or grub screw fastening.
  • Suspension shafts are durable stainless steel. At 3mm in diameter, they are thicker than 2.6mm parts on previous chassis for a sturdier suspension setup. They have a continuous groove for easier grub screw attachment.
  • New 2-part front upright designs utilize separate arm and bearing housing components.
  • New rear uprights are redesigned for use with 3mm diameter shafts.
  • New front hub carriers have been revised specifically for this chassis, with greater resistance to shocks and crashes. They are also compatible with 3mm diameter shafts. Upper and lower flanged tubes are now identical.


https://www.thercracer.com/2019/08/4...l-product.html

Its coming this autumn / Fall. Lots of options including alloy deck available on release.

42345 TRF420 Chassis kit
42346 TRF420 Wheel Axles (2 Pcs.)
42347 TRF420 Carbon Upper Deck
42348 TRF420 Carbon Lower Deck
42349 TRF420 Carbon Upper Deck 1.75mm
42350 TRF420 Aluminum Lower Deck
51636 TRF420 3x43mm Suspension Shafts (4 Pcs.)
51637 TRF420 3×25/22mm Suspension Shaft (2 Pcs.)
51638 TRF420 C-Parts (Front Uprights)
51639 TRF420 D-Parts (Suspension Arms)
51640 TRF420 E -Parts (Rear Uprights)
51641 TRF420 F-Parts
51642 TRF420 Front Direct Pulley (37T)
51643 TRF420 Diff Pulley & Case (37T)
51644 TRF420 B-Parts (Bumper)
51645 TRF420 K-Parts (Bearing Holders)
51646 TRF420 Rear Belt (62T)
54886 TRF419 Suspension Upgrade Set

https://www.thercracer.com/2019/08/4...-info.html?m=0


Last edited by Qatmix; 09-04-2019 at 06:44 AM.
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Old 08-23-2019, 03:15 AM
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Well, will be pretty neat to see which direction they take. wonder if it will be a mid motor from the get go, or perhaps adjustable like some of the other offerings, i.e. TB07
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Old 08-23-2019, 03:39 AM
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I will have to buy one just because it’s numbered “420”
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Old 08-23-2019, 03:41 AM
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I wonder... With no drivers dreamteam how well is the car develloped or is it just a redesign of what all other brands did figure out?
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Old 08-23-2019, 03:42 AM
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Should blaze the track just nicely.
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Old 08-23-2019, 04:14 AM
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Originally Posted by Qatmix View Post
42346 TRF420 Wheel Axles (2 Pcs.)

51636 TRF420 3x43mm Suspension Shafts (4 Pcs.)
51637 TRF420 3×25/22mm Suspension Shaft (2 Pcs.)
Things that caught my attention... Looks like suspension will be completely new rather than evolution of 419.


Originally Posted by 1/8 IC Fan View Post
.. wonder if it will be a mid motor from the get go, or perhaps adjustable like some of the other offerings, i.e. TB07
I doubt, since there is 62T rear belt in parts list

Last edited by Papi; 08-23-2019 at 07:17 AM.
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Old 08-23-2019, 06:31 AM
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So, after 5 years of 419........ And this one will have new geometry right?
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Old 08-23-2019, 06:33 AM
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Originally Posted by Papi View Post
Things that caught my attention... Looks like suspension will be completely new rather than evolution of 419.




I dount, since there is 62T rear belt in parts list
There are a lot of changes apparently. You have to ask yourself why the diff case and front pulley are listed as new. Maybe they are in a totally different position? Pics will surface soon, so we can see.
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Old 08-23-2019, 07:23 AM
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Originally Posted by Qatmix View Post
There are a lot of changes apparently. You have to ask yourself why the diff case and front pulley are listed as new. Maybe they are in a totally different position? Pics will surface soon, so we can see.
i would bet both pulley’s are on the same side for easy spur gear changes making a need for new diff and spool.


The 419 suspension upgrade is a nice touch to upgrade any 419 based car to the new suspension.
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Old 08-23-2019, 07:37 AM
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Originally Posted by snopro31 View Post


i would bet both pulley’s are on the same side for easy spur gear changes making a need for new diff and spool.


The 419 suspension upgrade is a nice touch to upgrade any 419 based car to the new suspension.
Yep, that is what I am thinking as well. The most important thing is new C-Hubs. Although once I was shown how to file down the inner part it seems to have made them more durable.
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Old 08-23-2019, 08:50 AM
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Originally Posted by Qatmix View Post
Yep, that is what I am thinking as well. The most important thing is new C-Hubs. Although once I was shown how to file down the inner part it seems to have made them more durable.

what did you file down and how?
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Old 08-23-2019, 09:23 AM
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Originally Posted by Qatmix View Post
Yep, that is what I am thinking as well. The most important thing is new C-Hubs. Although once I was shown how to file down the inner part it seems to have made them more durable.
hmm and you didn’t not share.. shame on you
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Old 08-23-2019, 09:40 AM
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Over the weekend, I saw the VBC D10 which borrowed the C hub (or lack there off) from Mi6 Evo.. I think it’s a solid design and was hoping that Tamiya would go away for the C Hubs..

Looks like we still have a C Hub.. hopefully it will be a beefy design
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Old 08-23-2019, 10:33 AM
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New 62t rear belt only says that spur gear/center pulleys are sitting a little bit more forward than in 419. Rear belt of 419 has 61t. Therefore no midmotor config nor a single belt.

New differential and spool design can be everything...wide pitch, wider belts, more narrow width of bulkheads or a complete internal redesign. An one-sided belt design needs not necessarily a re-design. You can switch spool or differential in bulkhead to one or the other side. That's, I think, not the reason, why Tamiya makes a re-design.

The most interesting thing for me will be the new suspension and hubs/uprights...
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Old 08-23-2019, 10:58 AM
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Originally Posted by Tom1977 View Post

New differential and spool design can be everything...wide pitch, wider belts, more narrow width of bulkheads or a complete internal redesign. An one-sided belt design needs not necessarily a re-design. You can switch spool or differential in bulkhead to one or the other side. ...

If both the center pulley's are moved to the one side you would not be able to flip the spool to make that work as it would then be in the center not to the side. it would make perfect sense to make a new pully for a new spool , it would also make sense to make a new rear diff case (almost everyone complains about leaking) but who knows we are all just being keyboard hero's with zero info to back our selves up lol
and all the really matters is all of us true blue fans are getting a new car soon!
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