Track 50mm x 21 links

Rugged polypropylene links. These links are very easy to interconnect.
Rubber has a Shore A hardness of 45.

Track 75mm x 21 links

Rugged polypropylene links. These links are very easy to interconnect.
Rubber has a Shore A hardness of 45.

Track Sprocket – 6 Link

Works with 6mm Universal Hub (HUB–02) and 4mm Hub (HUB–03). Sprocket diameter with tracks is 2.75” Pitch diameter (calculated, not measured) 2.14” Designed to be used back to back for a dual sprocket config.

Track Sprocket – 9 Link

Works with 6mm Universal Hub (HUB–02) and 4mm Hub (HUB–03). Sprocket diameter with tracks is 3.75” Pitch diameter (calculated, not measured) 3.13” Designed to be used back to back for a dual sprocket config.

Passive Idler Hub (Pair)

These passive idler hubs can be used with either the 6 or 9 link sprockets. They are designed to fit perfectly between two panels separated by 1.5" standoffs

Passive Idler Hub (Pair) - 3"

These passive idler hubs fit our 3" tracks, and can be used with either the 6 or 9 link sprockets. They are designed to fit perfectly between two panels separated by 2.5" standoffs.

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Gear Motor and Tread Package

Ready to build a caterpiller tread drive for your next robot? Here's a package that makes the job easy. It includes a pair of GM2 style gear motors, two GMTI idlers, two GMTC driver cogs (keyed to fit the GM2), and forty GMT links and pins sets (20 per side).

Get the set, and save more than 20% over buying the parts individually!

Please note that GM2 gear motors accompanying this package do not come with GMW hubs.

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Each tread link comes with a 1/16 pivot pin.

Gear Motor Tread Links
(GM2/3/8/9)

These 23mm wide x 12mm long tread links are very well designed, using 1/16" steel pins press-fit into precision CNC-drilled (not molded!) mounting holes. These treads will most likely outlive your robot!

Made of hard ABS plastic, these are ideal for the wild environments of shag carpeting and linoleum, as they won't cause too much friction when turning on the spot. But if you need more traction, you can easily glue on rubber feet for more grip!

Note: A minimum of 14 links is required for each track, using the default cogs and idlers.

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Gear Motor Tread Cogs
(GM2/3/8/9)

These cogs let you interface our popular GM2/3/8/9 series gear motors with the very cool GMT tread links. They've been precision molded to mate with the gear motor's double-flat output shafts. They're so precise and snug, you might not even need to use the included mounting screw to lock the cogs on!

The GMTC Cog measures 38mm diameter x 15mm wide, and is made of the same long-life ABS plastic the tread links use.

Note: The cogs have an extremely tight fit on the GM8 & GM9. You may find filing the gearmotor output shaft down a wee bit a huge help to mounting the cogs.

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Gear Motor Tread Idlers
(GM2/3/8/9)

You only need one motor per side on a tracked vehicle, but you'll need at least one idler wheel to stretch the tread between two points on your robot!

This idler matches the same dimensions as the driver cog (38mm dia x 15mm wide), but is drilled out to 1/4" (6.4mm), which lets you use a standard #8 bolt as the idler axle.

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