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42345 Tamiya TRF420 Official Product details and info

Here are the official details of the new TRF420. It is an extensive new redesign and there are loads of new features. Main focus is the...


Here are the official details of the new TRF420. It is an extensive new redesign and there are loads of new features. Main focus is the drivetrain, suspension geometry and steering set-up. 


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.

Also here is more detailed information on the suspension set, which is also available as an upgrade to the other TRF / TA07 chassis


54886 TRF419 Suspension Upgrade Set

This set overhauls your touring car suspension with brand new parts, designed to further hone its racing prowess. It includes, front uprights, front caster blocks, front and rear arms, and rear uprights.

Item Contents/Information
• C Parts (Front Uprights) x1
• D Parts (Suspension Arms) x2
• E Parts (Rear Uprights) x1
• F Parts (4° Hub Carriers) x1
• Small parts for attachment are also included.
• See below for detailed descriptions of the major components.
• Compatible with TRF419, TA07 and TB-05 PRO chassis cars.
* Rear offset will change. Use spacers to adjust accordingly.

Front Uprights: These are now a two-part design, with separate arm and bearing housing components, and now fitting bigger 3mm diameter shafts for more durability.

Hub Carriers: These feature a revised design more resistant to shocks and crashes. Upper and lower flanged tubes are now identical. A bigger suspension shaft (3mm) offers improved durability.

Suspension Arms: A tweaked design brings improved rigidity. Damper attachment is done via aluminum inserts, of which two different types are included to allow three different lever ratios (ratio of tire movement to suspension movement). A bigger suspension shaft (3mm) offers improved durability. Rear arms have a 3mm offset and so will require spacers for adjustment to your chassis.

Rear Uprights: A bigger suspension shaft (3mm) offers improved durability. Updated bearing position leads to smoother motion.


Also here are the individual part descriptions

42346 TRF420 Wheel Axles (2pcs.)

The new, lightweight wheel axles from the TRF420 chassis are to join the Tamiya Spare Parts line-up, promising top-level performance from your car!

Item Contents/Information
• TRF420 Wheel Axles x2
• Each axle weighs approximately 1.5g less than counterparts in Item 51445 TRF417 Wheel Axles (2pcs.), for less pressure and wear on tires.
• Compatible with TRF420, TRF419, TA07 and TB-05 PRO chassis cars.

42347 TRF420 Carbon Upper Deck

The newly designed TRF420 chassis kit carbon fiber upper deck is to be released as its own item!

Item Contents/Information
• TRF420 Carbon Upper Deck x1
• 2mm thickness carbon fiber upper deck was designed for the TRF420, to give an optimum balance of flexibility and rigidity.
• Compatible with TRF420 chassis cars.

42348 TRF420 Carbon Lower Deck

The newly designed TRF420 chassis kit’s carbon fiber lower deck is to be released as its own item!

Item Contents/Information
• TRF420 Carbon Lower Deck x1
• 2.25mm thickness carbon fiber lower deck was designed for the TRF420, to give an optimum balance of flexibility and rigidity.
• Compatible with TRF420 chassis cars.

42349 TRF420 Carbon Upper Deck (1.75mm Thick)

The TRF420 chassis is a thoroughbred racing chassis, and now you have even more setup options with the release of this thinner carbon fiber upper deck, which promises to be great on high-grip circuits.

Item Contents/Information
• TRF420 Carbon Upper Deck (1.75mm) x1
• At 1.75mm thickness, this component is 0.25mm thinner than the kit-standard deck, for more flex against roll stresses.
• Recommended for use with the aluminum lower deck in Item 42350.
• Compatible with TRF420 chassis cars.

42350 TRF420 Aluminum Lower Deck

The TRF420 chassis is a thoroughbred racing chassis, and now you have even more setup options with the release of this aluminum lower deck, which promises to be great on high-grip circuits.

Item Contents/Information
• TRF420 Aluminum Lower Deck x1
• Crafted in 2mm thick aluminum, this deck maintains excellent rigidity, with optimal flex provided by the large diagonal slits in the center.
• The black anodized finish provides a cool look.
• Recommended for use with the carbon fiber upper deck in Item 42349.
• Compatible with TRF420 chassis cars.

51636 TRF420 3x43mm Suspension Shafts (4pcs.)

These shafts, which were designed for the new TRF420 chassis, are now to join the Tamiya Spare Parts line-up.
Item Contents/Information
• 3x43mm Suspension Shafts x4
• Components are crafted in tough and durable stainless steel.
• Compatible with TRF420, TB Evo.6*, FF-03 EVO* and TG10-Mk.2FN* chassis cars.
*These chassis can only use the shafts on the front (2pcs.).

51637 TRF420 3x25mm & 3x22mm Suspension Shafts (2pcs. each)

These shafts, which were designed for the new TRF420 chassis, are now to join the Tamiya Spare Parts line-up.
They are for use with the new TRF420 design suspension arms.

Item Contents/Information
• 3x25mm Suspension Shafts x2
• 3x22mm Suspension Shafts x2
• Components are crafted in tough and durable stainless steel.
• At 3mm in diameter, they are thicker than 2.6mm parts on previous chassis for a sturdier suspension setup.
• Previous shafts had a cutaway flat section to fasten the grub screw on; these have a continuous groove to make it that little bit easier.
• Compatible with cars using Item 51639 TRF420 D Parts (Suspension Arms).

51638 TRF420 C Parts (Front Uprights)

The C Parts from the TRF420 chassis kit are now to join the Tamiya Spare Parts line-up. They feature the new 2-part front upright designs which utilize separate arm and bearing housing components.

Item Contents/Information
• TRF420 C Parts x1
• Components are molded in carbon fiber-reinforced plastic for superior rigidity.
• Compatible with TRF420, TRF419, TA07 and TB-05 PRO chassis cars.

51639 TRF420 D Parts (Suspension Arms)

The new D Parts (suspension arms) from the TRF420 chassis kit are now to join the Tamiya Spare Parts line-up.

Item Contents/Information
• TRF420 D Parts x2
• Components are molded in carbon fiber-reinforced plastic for superior rigidity.
• The tweaked design uses aluminum inserts for damper attachment. Using different inserts (sold separately) allows adjustment of lever ratio, with three different setups possible.
• Rear arms are 3mm offset to the rear, allowing the shorter TRF420 lower deck (while keeping the same wheelbase) and giving increased rear traction.
• For use with 3mm diameter shafts (sold in Item 51637).
• Compatible with TRF420, TRF419*, TA07* and TB-05 PRO* chassis cars.
*Rear arms have different offset to kit standard parts, and require adjustment of wheelbase using spacers, etc.

51640 TRF420 E Parts (Rear Uprights)

The new E Parts (rear uprights) from the TRF420 chassis kit are now to join the Tamiya Spare Parts line-up.

Item Contents/Information
• TRF420 E Parts x1
• Components are molded in carbon fiber-reinforced plastic for superior rigidity.
• Bearing positions are precisely aligned for maximum efficiency.
• For use with 3mm diameter shafts (sold in Item 51637).
• Compatible with cars using Item 51639 TRF420 D Parts (Suspension Arms).

51641 TRF420 F Parts (4° Hub Carriers)

The new F Parts (front hub carriers) from the TRF420 chassis kit are now to join the Tamiya Spare Parts lineup.

Item Contents/Information
• TRF420 F Parts x1
• Components are molded in carbon fiber-reinforced plastic for superior rigidity.
• The design was revised specifically for the TRF420 chassis, with greater resistance to shocks and crashes.
• Upper and lower flanged tubes are now identical.
• For use with 3mm diameter shafts (sold in Item 51637).
• Compatible with cars using Item 51639 TRF420 D Parts (Suspension Arms).

51642 TRF420 Front Direct Pulley (37T)

The new one-piece front direct pulley from the TRF420 chassis kit is now to join the Tamiya Spare Parts lineup.

Item Contents/Information
• TRF420 Front Direct Pulley x1
• 0.2mm & 0.3mm Shims x2 each
• 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 now screw-attached (was 2×9.8mm pins on previous chassis), allowing their replacement without the need to remove the direct pulley component.
• Compatible with TRF420 and TA07 chassis cars.

51643 TRF420 Differential & Pulley Case (37T)

The new differential pulley and case from the TRF420 chassis kit are now to join the Tamiya Spare Parts lineup.

Item Contents/Information
• TRF420 37T Differential Pulley x1
• TRF420 Differential Case x1
• 0.2mm & 0.3mm Shims x2 each
• The new design not only provides a weight savings of 1.5g, but also promises even less oil leakage.
• Compatible with TRF420 and TA07 chassis cars.

51644 TRF420 B Parts (Bumper)

The new B Parts from the TRF420 chassis kit are now to join the Tamiya Spare Parts line-up. This sprue includes bumper and body mount components.

Item Contents/Information
• TRF420 B Parts x1
• 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 to fine-tune your car’s center of balance.
• Compatible with TRF420 chassis cars.

51645 TRF420 K Parts (Bearing Holders)

The new K Parts from the TRF420 chassis kit are now to join the Tamiya Spare Parts line-up. This sprue includes bearing holder, pulley flange and antenna post components.

Item Contents/Information
• TRF420 K Parts x1
• Bearing holders (employed on gear diff and front direct pulley) were redesigned for the TRF420 chassis, in order to provide even more precise location and a super-smooth drivetrain.
• Compatible with TRF420 chassis cars

51646 TRF420 Rear Belt (62T)

The longer 62T drive belt (for use on the rear) from the TRF420 chassis kit is now to join the Tamiya Spare parts line-up.

Item Contents/Information
• TRF420 Rear Belt (62T) x1
• This belt is made from reinforced, stretch-resistant material.
• It is recommended to change belts periodically to maintain optimum performance.
• Compatible with TRF420 chassis cars.

Source Tamiya.com

TRF420 1164205028501463400

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