Strafer® Chassis Kit (140mm Mecanum Wheels)


Drive in any direction with the Strafer® Chassis Kit! This version utilizes 140mm diameter mecanum wheels. (A 96mm wheels version is also available.)

Mecanum wheels have diagonal rollers that allow the chassis to drive sideways and diagonally, in addition to conventional skid-steer style steering. This kit’s mecanum wheels are just one of the many ways it provides for the construction of a rigid, low profile, extensively modifiable chassis you can reconfigure in any direction!

At first glance, you might wonder: where are the motors? Flip the chassis over to see four 223 RPM 5203 Series Planetary Gear Motors seated within the channel frame. These motors drive steel miter gears and heavy duty hub-shafts riding on ball bearings to make for low-friction holonomic action! The included 140mm diameter mecanum wheels give the chassis a theoretical speed of 5.35 ft/sec.

Miter Gears
The motors owe their compact position to the 90° drive created by steel miter gears inside each corner of the chassis. Thoroughly battle-tested through years of robots at even the highest level of competition, they boast profile-matched bores to eliminate any chance of slipping.

8mm REX motor shafts and hub-shafts facilitate fierce positive drive and a smooth assembly.

The goBILDA® Mecanum Wheels feature ball-bearing supported rollers, a narrow profile, and steel side plates. The 140mm diameter provides a massive 46mm of ground clearance for avoiding and overcoming obstacles!

Unlike other frames requiring exposed motion components, the Strafer Chassis can fit all non-wheel parts inside its highly configurable and goBILDA® pattern 1120 Series U-Channel structure.

not in ftc?

If you're building outside FTC: You don't need a garage of parts or any prior experience to power and drive your new chassis with mobile mecanum action! Just purchase the following products to accompany your Strafer Chassis Kit.

  • 1 Mecanum Mixer (3109-0001-0001)
  • 1 Strafer™ Chassis Kit (3209-0001-0005 or 3209-0012-0001)
  • 1 Radio Control System (3113-2006-0001)
  • 1 Battery (3100-0012-0020)
  • 1 Battery Charger (3101-0012-0001)
  • 4 Motor Controllers (3105-0101-0015)
  • 1 Power Distribution Board (3108-2833-0801)

Product Insight #4 in the image gallery above shows you how to wire them together for remote control capabilty!

If you are in FTC: Note that while our Strafer Chassis are competition-legal, the only competition-legal item in the list above is the XT30 Power Distribution Board. The overall setup, however, can be useful for prototyping!

Kit Contents:

2 1120-0010-0264 x 2

1120 Series U-Channel (10 Hole, 264mm Length)

2 1120-0017-0432 x 2

1120 Series U-Channel (17 Hole, 432mm Length)

8 1201-0043-0002 x 8

1201 Series Quad Block Pattern Mount (43-2)

4 1522-0010-0120 x 1 1522 Series 8mm ID Spacer (10mm OD, 12mm Length) - 4 Pack
4 1611-0514-0006 x 2

1611 Series Flanged Ball Bearing (6mm ID x 14mm OD, 5mm Thickness) - 2 Pack

4 1611-0514-0008 x 2

1611 Series Flanged Ball Bearing (8mm ID x 14mm OD, 5mm Thickness) - 2 Pack

4 2110-0608-0001 x 4

Shouldered 8mm REX Hub-Shaft (70mm Length)

8 2315-4008-0030 x 8

2315 Series Steel, MOD 1.25 Miter Gear (8mm REX Bore, 30 Tooth)

25 2800-0004-0008 x 1

2800 Series Zinc-Plated Steel Socket Head Screw (M4 x 0.7mm, 8mm Length) - 25 Pack

75 2800-0004-0011 x 3

2800 Series Zinc-Plated Steel Socket Head Screw (M4 x 0.7mm, 11mm Length) - 25 Pack

25 2801-0004-0008 x 1

2801 Series Zinc-Plated Steel Washer (4mm ID x 8mm OD) - 25 Pack

12 2807-0811-0500 x 2 2807 Series Stainless Steel Shim (8mm ID x 11mm OD, 0.50mm Thickness) - 12 Pack
4 3213-3606-0003 x 1

140mm Mecanum Wheel Set (70A Durometer Bearing Supported Rollers)

4 3801-0613-0100 x 4

2-Pos JST VH [MH-FC] to 3.5mm Bullet [MH-FC] Adaptor (100mm Length)

1 5027103001 x 1 Wera Tools 2.5mm Ball End Hex-Plus L-Key
1 5027104001 x 1

Wera Tools 3mm Ball End Hex-Plus L-Key

4 5203-2402-0027 x 4

5203 Series Yellow Jacket Planetary Gear Motor (26.9:1 Ratio, 24mm Length 8mm REX™ Shaft, 223 RPM, 3.3 - 5V Encoder)



Hardware & Tools



Weight 4872g (10.74lbs) Assembled

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