> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # Pololu 22T Track Set - Black **Type:** Product page · **SKU:** POLOLU-3030 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/pololu-22t-track-set-black.html ([markdown](https://core-electronics.com.au/pololu-22t-track-set-black.html.md)) This track set includes a pair of 22-tooth silicone tracks, two black drive sprockets measuring 35 mm (1.4") in diameter, and two matching idler sprockets... ## Pricing - **Price:** $25.10 (inc GST) — $22.82 AUD, exc GST - **Quantity discounts:** 10+ $21.91 (exc GST) · 25+ $21.22 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 24 and Aug 26. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-3030:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/POLOLU-3030:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description This set contains components for adding a tracked drive system to a small robot or vehicle. It consists of: - Two silicone tracks - Two ABS drive sprockets - Two ABS idler sprockets - Two M3 shoulder bolts with a 5mm threaded portion - Two M3 shoulder bolts with a 12mm threaded portion - Two washers and M3 nuts | \| [![](https://core-electronics.com.au/attachments/localcontent/0J7929_195632f1091.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7929_47056a19e94.jpg) \| \|---\| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J7930_25403fc5c19.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7930_50428cdc735.jpg) \| \|---\|---\| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J7931_20947054037.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7931_40674b7ee72.jpg) \| \|---\|---\| | |---| Pololu make the sprockets in three different colors (black, red, and white) and the tracks in two different lengths (22 teeth and 30 teeth), which allows Pololu to offer a total of six different track set combinations: | [![](https://core-electronics.com.au/attachments/localcontent/0J7915_18476b0905a.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7915_4852058ff9e.jpg) | |---| | Pololu 30T track set with red sprockets mounted on a 3D-printed chassis. | | [![](https://core-electronics.com.au/attachments/localcontent/0J7919_15732618cb5.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7919_339823b7eef.jpg) | |---| | Side view of Pololu 30T track set with white sprockets mounted on a 3D-printed chassis. | - [22T tracks with black sprockets](https://core-electronics.com.au/pololu-22t-track-set-black.html) - [22T tracks with red sprockets](https://core-electronics.com.au/pololu-22t-track-set-red.html) - [22T tracks with white sprockets](https://core-electronics.com.au/pololu-22t-track-set-white.html) - [30T tracks with black sprockets](https://core-electronics.com.au/pololu-30t-track-set-black.html) - [30T tracks with red sprockets](https://core-electronics.com.au/pololu-30t-track-set-red.html) - [30T tracks with white sprockets](https://core-electronics.com.au/pololu-30t-track-set-white.html) Additionally, Pololu offer the [red sprockets](https://core-electronics.com.au/replacement-sprocket-set-for-zumo-chassis-red.html) and [white sprockets](https://core-electronics.com.au/replacement-sprocket-set-for-zumo-chassis-white.html) by themselves (without tracks or fasteners) for use as replacements for the black sprockets included with Pololu's [Zumo robots](https://core-electronics.com.au/search/?q=zumo+robot). The flexible one-piece silicone tracks are available in two lengths, with either 22 teeth or 30 teeth that are designed to mesh with the drive and idler sprockets. The 22T set, with an overall length under 90 mm, is short enough to be used as the drive system for a mini-sumo robot (for example, Pololu's [Zumo chassis](https://core-electronics.com.au/zumo-chassis-kit-no-motors.html) and [Zumo 32U4 robot](https://core-electronics.com.au/pololu-zumo-32u4-robot-assembled-with-75-1-hp-motors.html)). The drive sprockets are designed to press-fit securely on the output shafts of Pololu's [micro metal gearmotors](https://core-electronics.com.au/components/motors/metal-gearmotors/micro.html), [15.5D mm metal gearmotors](https://core-electronics.com.au/35-1-metal-gearmotor-15-5dx30l-mm.html), and [mini plastic gearmotors](https://core-electronics.com.au/search/?q=mini+plastic+gearmotor) with 3mm D-shaft outputs. On Pololu's Zumo robots, these gearmotors are intended to be mounted [with the raised lip on one side of the drive sprocket facing away from the motor](https://core-electronics.com.au/attachments/localcontent/0J6692_933306d7349.png), but if you are not using a Zumo chassis, you can insert the drive sprockets onto the 3mm D-shafts in either orientation. Both the [extended](https://core-electronics.com.au/pololu-micro-metal-gearmotor-bracket-extended-pair.html) and [non-extended](https://core-electronics.com.au/pololu-micro-metal-gearmotor-bracket-pair-black.html) versions of Pololu's micro metal gearmotor brackets work with these hubs. Although the drive sprockets are similar to the hubs used in the [Pololu 42×19mm wheels](https://core-electronics.com.au/pololu-wheel-42x19mm-pair.html), they are not as wide, so Pololu do not physically support the whole tire. A pair of idler sprockets is also included in the set; these are very similar to the drive sprockets, with the main difference being that they are designed to spin freely instead of attaching to a motor shaft. They can be mounted with the provided shoulder bolts as shown in the diagram below. (The blue component labeled “ROBOT CHASSIS” represents a bracket or piece of a robot chassis that the sprocket is being mounted to, and is not a part included in the set.) Pololu's [nylon spacers](https://core-electronics.com.au/hardware/spacers-standoffs.html) with 3.3 mm inner diameters can be used to offset the sprockets from a flat mounting surface. | [![](https://core-electronics.com.au/attachments/localcontent/0J7941_192431b08af.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7941_10904292320.png) | |---| | Exploded view diagram showing an idler sprocket and its mounting hardware. | Pololu include two pairs of shoulder bolts with the kit, one with a 5mm threaded portion and one a 12mm threaded portion, so you can pick the pair that is appropriate for your application. You will only use two of the four included shoulder bolts. **Details for item #3030** This track set comes with **black** sprockets and **22T** tracks. | [![](https://core-electronics.com.au/attachments/localcontent/0J7926_230613dd47f.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7926_277792a474d.jpg) | |---| | Pololu 22T Track Set – Black. | | \| [![](https://core-electronics.com.au/attachments/localcontent/0J7932_233250b6b15.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7932_52568b9df63.jpg) \| \|---\| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J7929_195632f1091.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7929_47056a19e94.jpg) \| \|---\|---\| | |---| **Dimensions** A dimension diagram containing the sprockets, tracks, and bolts is available here (618k pdf). Several key dimensions are highlighted below: - Sprocket diameter: 35 mm (1.38") - Diameter with track: approx. 39 mm (1.54") - Track width: 14.6 mm (0.57") The threaded portion of the shoulder bolts can be cut to the desired length. The ideal spacing between the centers of the two sprockets is about 48 mm for the 22T tracks and 85 mm for the 30T tracks. Because the tracks are elastic, they will maintain tension even if you do not precisely match this distance. However, if the spacing is too short, they will be loose and more likely to slip off; if the spacing is too long, additional strain will be placed on the sprocket shafts, and the motor might not be able to turn as well. | [![](https://core-electronics.com.au/attachments/localcontent/0J7923_2303183a55e.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7923_87819d4c9fe.jpg) | |---| | Sprocket spacing diagram for the Pololu 22Tand 30T track sets. | These track sets are similar to Pololu's original [22T](https://core-electronics.com.au/pololu-22t-track-set.html) and [30T](https://core-electronics.com.au/pololu-30t-track-set.html) track sets, except they replace the old sprockets with newer, spoked versions. This spoked design removes material from several areas near the central hub of the sprocket, which has the advantage of allowing the drive sprocket to be more easily removed from the D-shaft of the motor while still remaining firmly fixed after being press-fit into place. **People often buy this product together with:** | [![Pololu Wheel 32×7mm Pair - Black](https://core-electronics.com.au/attachments/localcontent/0J10440_29608f3f41.jpg)](https://core-electronics.com.au/pololu-wheel-32x7mm-pair-black.html) | [Pololu Wheel 32×7mm Pair - Black](https://core-electronics.com.au/pololu-wheel-32x7mm-pair-black.html) | |---|---| | [![Pololu Micro Metal Gearmotor Bracket Extended Pair](https://core-electronics.com.au/attachments/localcontent/0J1130_2188a9638f.jpg)](https://core-electronics.com.au/pololu-micro-metal-gearmotor-bracket-extended-pair.html) | [Pololu Micro Metal Gearmotor Bracket Extended Pair](https://core-electronics.com.au/pololu-micro-metal-gearmotor-bracket-extended-pair.html) | |---|---| | [![Pololu 22T Track Set - Red](https://core-electronics.com.au/attachments/localcontent/0J7927_4059cc8670.jpg)](https://core-electronics.com.au/pololu-22t-track-set-red.html) | [Pololu 22T Track Set - Red](https://core-electronics.com.au/pololu-22t-track-set-red.html) | |---|---| **Dimensions** | Size: | 22T (48 mm between sprocket centers) | |---|---| **General specifications** | Color: | black | |---|---| **File downloads** - **Dimension diagram of the Pololu Track Set (618k pdf)** - **3D model of the Pololu 22T Track Set (5MB step)** - **3D model of the Pololu 30T Track Set (5MB step)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_11770.jpg)