Description
- Fit onto the 3mm D shafts of Pololu's Mini/Micro Metal and 120:1 Mini Plastic Gearmotor
- Comes with silicone tire (3.54" diameter)
- Size: 90 x 10mm
- Sold in pairs
Pololu introduces the Pololu Wheel 90 x 10mm Black (Pair). These black plastic wheels press-fit onto the 3mm D shafts of Pololu's mini metal gearmotors, micro metal gearmotors, and 120:1 mini plastic gearmotor 90-degree 3mm D-shaft output to make a nice drive solution for small robots. The wheels have silicone tires and measure 90 mm (3.54") in diameter. Two additional mounting holes make it possible to use the wheel with Pololu's universal mounting hub for 3mm shafts, 4mm shafts, 5mm shafts, and 6mm shafts. The slots in the six spokes allow additional accessories to be mounted to the wheel (e.g decorations or parts of an encoder system). The left picture below shows the wheel mounted to a 37D mm metal gearmotor with a universal mounting hub for 6mm shafts. The wheels are sold in pairs.
I am using these wheels for my project, works very well!
Needed a taller thinner wheel tire combo for a vehicle application. Looked at a variety of options and went with this. Happy with the choice.
Solid construction, grippy tires, and with the Polulo universal hub, it fits all motor shafts. Can't ask for more than that.
These are very good wheels but I'm dumb so they didn't work out great for me. I bought these wheels and 4mm universal hubs. These wheels don't work with the universal hubs that I used, so I had to drill holes in the wheels. Also, make sure to keep track of both of your tires. I lost one of mine and couldn't use the other tire either since it would be uneven. I just duct-taped around the edges to add some traction. I use these wheels on a robot and they still work pretty well even with my constant stupidity throwing everything I have at it. However, these wheels are very nice quality and very stable, even with my duct tape wheels. Just don't be stupid like me.
I use them on a balancing robot driven by two NEMA 17 stepper motors. Connected with Pololu Universal Aluminum 5mm Mounting Hubs, the wheels are easily and strongly fixed on the schaft.
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorization (RA) before initiating a return request.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at RoboItchi's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
- Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RoboItchi's troubleshooting process or of a verified shipping error by RoboItchi.
- Refunds are processed within 7 days after receipt and inspection of the returned item.
- A ¥10,000 cleaning fee may apply to domestic robots returned in used or unclean condition.
- A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RoboItchi's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
- Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
- Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
- Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
- Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
- Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items — Standard catalogue products not stocked by RoboItchi and ordered specifically to fulfill a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
How to Request a Return Authorization (RA)
To request a return, submit a support ticket from your account under My Support Tickets to obtain a Return Authorization (RA) number. Returns without an RA number will be refused.

