> **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 # Solarbotics RW2i Wheel (internal set screw) **Type:** Product page · **SKU:** POLOLU-1127 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/solarbotics-rw2i-wheel-internal-set-screw.html ([markdown](https://core-electronics.com.au/solarbotics-rw2i-wheel-internal-set-screw.html.md)) The RW2i rubber wheel features an internal set screw ideal for designs with space constraints. The 1.23-inch diameter wheel by Solarbotics is made for 3 mm diameter output shafts. These wheels are sold individually, NOT in pairs. ## Pricing - **Price:** $17.60 (inc GST) — $16.00 AUD, exc GST - **Quantity discounts:** 10+ $15.36 (exc GST) · 25+ $14.88 (exc GST) ## Availability & dispatch - Out of stock — the product page offers email notification when it returns. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-1127:1` (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-1127:1.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 | [![](https://core-electronics.com.au/attachments/localcontent/0J2620_625932a886.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2620_57285a9735c.jpg) | |---| | Solarbotics RW2i wheel featuring an internal set screw. | The Solarbotics RW2i rubber robot wheel has a black, anodized aluminum hub with a generously thick silicone rubber tire for maximum traction (great for minisumo robots or fast line-following robots that need traction when rounding corners). This wheel features an internal set screw hidden underneath the tire. This saves valuable space when designing robots for competitions with size constraints. For a similar product with an external set screw, see the [Solarbotics R2W](https://core-electronics.com.au/solarbotics-rw2-wheel-external-set-screw.html) wheel. The rubber tire has a diameter of 1.1 inches (28 mm) and a width of 0.5 inches (12.7 mm), and it has a 20D durometer. The aluminum hub is drilled for an 3 mm axle. Secure the wheel to your motor shaft with the included 4-40 hex set screw (requires a [0.050-inch hex wrench](https://core-electronics.com.au/hex-allen-wrench-0-05.html)). The wheel assembly weighs 12.2 grams. This high-traction wheel works with Pololu's [3 mm shaft gearmotors](https://core-electronics.com.au/category/57/3mm-shaft-gearmotors) such as Pololu's [micro metal gearmotors](https://core-electronics.com.au/components/motors/metal-gearmotors/micro.html) and the [GM12a, GM13a, GM14a, and GM18mini metal gearmotors](https://core-electronics.com.au/solarbotics-gm12a-100-1-mini-metal-gear-motor.html). #### Included Parts - One hub - One tire - One set screw A [0.05" hex wrench](https://core-electronics.com.au/hex-allen-wrench-0-05.html) (not included) is required for mounting the wheel. The wheels are **sold individually**, NOT in pairs. **People often buy this product together with:** | [![Solarbotics RW2 Wheel (external set screw)](https://core-electronics.com.au/attachments/localcontent/0J2851_3274146195.jpg)](https://core-electronics.com.au/solarbotics-rw2-wheel-external-set-screw.html) | [Solarbotics RW2 Wheel (external set screw)](https://core-electronics.com.au/solarbotics-rw2-wheel-external-set-screw.html) | |---|---| | [![TB6612FNG Dual Motor Driver Carrier](https://core-electronics.com.au/attachments/localcontent/0J4617_4924d06fb3.jpg)](https://core-electronics.com.au/tb6612fng-dual-motor-driver-carrier.html) | [TB6612FNG Dual Motor Driver Carrier](https://core-electronics.com.au/tb6612fng-dual-motor-driver-carrier.html) | |---|---| | [![Pololu Ball Caster with 3/8](https://core-electronics.com.au/attachments/localcontent/0J9812_25150e1b56.jpg)](https://core-electronics.com.au/pololu-ball-caster-with-3-8-metal-ball.html) | [Pololu Ball Caster with 3/8" Metal Ball](https://core-electronics.com.au/pololu-ball-caster-with-3-8-metal-ball.html) | |---|---| **Dimensions** | Size: | 1.1" diameter; 0.5" wide | |---|---| | Weight: | 12 g | ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/o/solarbotics_rw2i_wheel__internal_set_screw___pololu_1127__00.jpg)