Hobbydex / RC cars / Tamiya / TRF104 / TRF104 Chassis Kit

Tamiya TRF104 Chassis Kit

Also on TamiyaBase, a fan site; a courtesy link, not a source for Hobbydex.

Platform: TRF104
Scale: 1/10
Type: formula car · 2WD · electric
Item number: 42389
Released: 28 Jun 2025
Manual: manufacturer website
Build: Kit
Status: discontinued

Bearings (2 sizes)

Counts per car, from the build manual.

Size	Qty	Parts
5x10x4mm ball bearing (MR105)	2	42366
5x11x4mm ball bearing (MR115)	2	42377

Also 1 bearing part of unknown size: 19803538.

Bearing kits for this car

Kit	Bearings	Against the box
Fast Eddy Bearings TFE9804 Tamiya TRF104 Chassis Kit Sealed Bearing Kit	8	too few 5x11x4mm ball bearing (MR115)
Fast Eddy Bearings TFE9805 Tamiya TRF104 Chassis Kit Ceramic Sealed Bearing Kit	8	too few 5x11x4mm ball bearing (MR115)

Quantities are per car, read from the build manual's steps; Pack is how many pieces one part number buys.

Show Build steps

In the box (92)

Ball ends and links (6)

Number	Name	Qty	Pack	Brand	Step
53968	5x5mm Hard Hex Head Ball Connector (5pcs.)	5	5	Tamiya	MC18
63906	5x5mm Hex Ball Connector (Blue)	5		Tamiya	MA21
19803107	Lower Suspension Ball	5		Tamiya	MA19
19803108	Suspension Ball Mount (Black)	10		Tamiya	MA20
19803114	Upper Suspension Ball	10		Tamiya	MB11
19808238	3x35mm Aluminum Turnbuckle Shaft	2		Tamiya	MA25

Bearings and bushings (3)

Number	Name	Qty	Brand	Step
42366	1050 Ball Bearing	2	Tamiya	ME7
42377	1150 Ball Bearing	2	Tamiya	MD8
19803538	1060 Flanged Ball Bearing		Tamiya	MD9

Chassis and mounts (13)

Number	Name	Qty	Brand	Step
54200	F104 Aluminum Body Mount Set		Tamiya	ME23
13404163	Lower Deck		Tamiya
13404166	Damper Stay		Tamiya	ME24
13404167	Battery Stopper		Tamiya	MD19
13404168	Upper Brace		Tamiya	ME31
13404170	Roll Spring Mount, Motor Mount (L, R) (Blue)	1	Tamiya	MC16, MC17
13451551	Front Bulkhead (Blue)		Tamiya	MA27
13451555	Ackerman Plate (Blue)		Tamiya	MA30
13451556	Center Bulkhead (Blue)		Tamiya	MA28
13451565	Lower Brace		Tamiya
19444279	Servo Stay (Blue)	2	Tamiya	MA17
19803104	11.5mm Aluminum Post (Blue)		Tamiya
19803533	Rear Stiffener (L, R) (Blue)	1	Tamiya	MC10, MC15

Differential (4)

Number	Name	Qty	Brand	Step
51442	Ball Diff Plate	2	Tamiya	MD17
53379	3mm Lightweight Differential Ball Set	20	Tamiya	MD23
13450183	Diff Cap		Tamiya	MD11
13454891	Diff Housing A (Blue)		Tamiya	MD21

Drivetrain (4)

Number	Name	Qty	Brand	Step
13484043	Rear Shaft		Tamiya	MD20
19803327	4x48mm Tumbuckle Shaft	2	Tamiya	MB10
19804890	3x35mm Shaft	2	Tamiya	MB9
19808243	2x14mm Shaft		Tamiya	MD15

Motors (1)

Number	Name	Qty	Pack	Brand	Step
13451563	Motor Adapter			Tamiya	MD18

Nuts (4)

Number	Name	Qty	Brand	Step
42323	5mm Damper Ball Connector Nut	8	Tamiya	ME16
53159	4mm Flange Lock Nut (Blue)	5	Tamiya	ME3
53640	5mm Aluminum Ball Nut Blue	10	Tamiya	MA22
19804495	5mm Ball Connector Nut		Tamiya

O-rings and seals (4)

Number	Name	Qty	Brand	Step
42359	3mm Silicone O-Ring (Blue)	8	Tamiya	ME6
53574	TRF Damper Rod Guide & O-Ring Set 4 Sets	4	Tamiya	ME11, ME12
19444361	12mm O-Ring	4	Tamiya	ME5
19804262	O-Ring Set	4	Tamiya	MA14

Oils and greases (1)

Number	Name	Qty	Pack	Brand	Step
53576	TRF Damper Oil Seal (4pcs.)		4	Tamiya

Parts trees (4)

Number	Name	Brand
10115211	S Parts	Tamiya
19007743	A Parts	Tamiya
19114110	L Parts	Tamiya
19225133	W Parts	Tamiya

Pinions (1)

Number	Name	Qty	Pack	Brand	Step
53103	0.4 Pinion Gear (24T,25T)			Tamiya

Screws (10)

Number	Name	Qty	Pack	Brand	Step
54862	Aluminum Servo Step Screws (4pcs.)	4	4	Tamiya	MA7
19804194	3x10mm Screw	2		Tamiya	MA10
19804339	4x10mm Countersunk Head Screw	10		Tamiya	MA4
19804394	2.6x10mm Binding Screw	5		Tamiya	MA6
19804681	4x20mm Hex Countersunk Head Screw	2		Tamiya	ME1
19805612	3x10mm Cap Screw	5		Tamiya	MD1
19805663	2.6x6mm Cap Screw	4		Tamiya	MD3
19805746	3x8mm Cap Screw			Tamiya
19805831	2x8mm Cap Screw			Tamiya
19808011	3x8mm Screw	2		Tamiya	MC4

Shock springs (2)

Number	Name	Qty	Pack	Brand	Step
50509	F-1 Front Spring Set	4		Tamiya	MB8
53333	Touring Car Tuned Spring Set (Short Type)	2		Tamiya	ME30

Shocks (7)

Number	Name	Qty	Pack	Brand	Step
42131	Damper Cylinder	2		Tamiya	ME29
53573	TRF Damper Piston (3-Hole / 4pcs.)	4	4	Tamiya	ME13
53850	TRF Damper Titanium Coated Piston Rod 2pcs.		2	Tamiya
54871	Reinforced V Parts for TRF Dampers	1		Tamiya
19444360	Spring Retainer (Blue)	4		Tamiya	ME28
19803116	Roll Damper Cylinder	2		Tamiya	ME27
19803117	Roll Damper Piston (Black)	2		Tamiya	ME22

Spur gears (2)

Number	Name	Qty	Pack	Brand	Step
54055	TB-03 04 Module Spur Gear (96T)			Tamiya	MD16
54215	Spur Gear Adapter (F104)			Tamiya	MD13

Steering (4)

Number	Name	Qty	Brand	Step
51000	Hi-Torque Servo Saver (Black)		Tamiya
13451553	Steering Post (Blue)		Tamiya	MA16
13451554	Steering Arm (Blue)		Tamiya	MA29
19804999	Steering Post (Blue)	2	Tamiya	MC11

Suspension (7)

Number	Name	Qty	Brand	Step
54154	F103 Carbon Reinforced Front Upright	2	Tamiya	MB12
13404171	Rear Suspension Plate		Tamiya
13451552	Upper Arm Mount (Blue)		Tamiya	MB13
19803531	Front Lower Arm	2	Tamiya
19803535	Suspension Mount Bushing		Tamiya	MC7
19803536	Suspension Bracket (Blue) (MC13 x2) Bell Crank Mount (3) (Set 1)		Tamiya
19803537	Suspension Mount (Blue)	2	Tamiya	MC12

Washers, shims and spacers (5)

Number	Name	Qty	Brand	Step
53539	φ 5.5mm Aluminum Spacer Set	4	Tamiya	MA12, MC5, ME9
13455940	Diff Spacer		Tamiya	MD6
19804246	5x0.5mm Spacer		Tamiya
19804641	3(5.5)x5.0mm Spacer (Blue)		Tamiya
19805645	3x0.7mm Spacer		Tamiya

Wheels (1)

Number	Name	Qty	Pack	Brand	Step
13454892	Wheel Stopper (Blue)			Tamiya	MD22

Other (9)

Number	Name	Qty	Pack	Brand	Step
50797	5mm Adjuster (Short)	8		Tamiya	ME15
54869	Open Face 5mm Reinforced Adjusters (Long/8pcs.)	8	8	Tamiya	MA15
84171	2mm C-Ring			Tamiya
84174	5mm Disk Spring	5		Tamiya	MD14
10444434	5mm Adjuster (Short)			Tamiya	ME14
13404169	Rear Bulkplate			Tamiya	MC9
19444358	CylinderCap (Blue)	4		Tamiya	ME21
19444359	Rod Guide Cap (Blue)	4		Tamiya	ME20
19804537	Roll Spring	2		Tamiya	MC8

Sources

Data: 42389.toml on GitHub · report an error