Tamiya TRF420 Thread
#1
Tech Master
Thread Starter

Tamiya TRF420X Review (Click Here)
Tamiya TRF420 Review - (Click Here)

https://www.thercracer.com/2019/12/4...eview-and.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
https://www.thercracer.com/2019/10/4...-download.html
TheRcRacer TRF420 Build Review and set-up
https://www.thercracer.com/2019/12/4...eview-and.html
Kentech TRF420 Presentation
https://kentech.wordpress.com/2019/1...-presentation/
PetitRC TRF420 Set-ups
http://site.petitrc.com/reglages/tamiya/setuptrf420/
TheRcRacer TRF420X Build / review and set-up
https://www.thercracer.com/2022/07/4...w-and.html?m=0
Kentech TRF420X Presentation
https://kentech.wordpress.com/2022/0...-presentation/
https://www.thercracer.com/2019/08/4...l-product.html
https://www.thercracer.com/2019/08/4...-info.html?m=0
Tamiya TRF420 Review - (Click Here)

https://www.thercracer.com/2019/12/4...eview-and.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/2019/10/4...-download.html
TheRcRacer TRF420 Build Review and set-up
https://www.thercracer.com/2019/12/4...eview-and.html
Kentech TRF420 Presentation
https://kentech.wordpress.com/2019/1...-presentation/
PetitRC TRF420 Set-ups
http://site.petitrc.com/reglages/tamiya/setuptrf420/
TheRcRacer TRF420X Build / review and set-up
https://www.thercracer.com/2022/07/4...w-and.html?m=0
Kentech TRF420X Presentation
https://kentech.wordpress.com/2022/0...-presentation/
https://www.thercracer.com/2019/08/4...l-product.html
https://www.thercracer.com/2019/08/4...-info.html?m=0
Last edited by Qatmix; 07-04-2022 at 05:01 AM.
#4

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?
#5
Tech Adept

Should blaze the track just nicely.
#6
Tech Regular

I doubt, since there is 62T rear belt in parts list
Last edited by Papi; 08-23-2019 at 08:17 AM.
#7
Tech Addict

So, after 5 years of 419........ And this one will have new geometry right?
#8
Tech Master
Thread Starter

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.
#10
Tech Master
Thread Starter

#14

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...
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...
#15

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!