The FingerTech Urethane Sumo Wheel 2.50" is a high-performance wheel designed for competitive robotics applications. It features a high-traction polyurethane tire molded around a robust, machined, and anodized aluminum rim. This construction ensures durability and optimal performance in demanding environments.
The tire tread is composed of Shore A20 polyurethane, renowned for its superior traction capabilities, making it an ideal choice for sumo robots weighing up to 6kg. The black anodized aluminum rims are engineered with machined rings and captive through-slots, ensuring the tire tread remains securely in place during operation.
This wheel is available in various colors, each made to order, allowing for customization to suit specific aesthetic preferences. The rim material is crafted from 6061 aluminum, providing a lightweight yet sturdy foundation for the wheel. The wheel's dimensions include an outer diameter of 63.5mm, a width of 38.1mm, and an inner diameter of 38.1mm, with a total weight of 123 grams.
Note: Clean the tires with isopropyl alcohol wipes before each match to maintain optimal traction.
1x FingerTech Urethane Sumo Wheel 2.50"
Diameter: 2.50 inches
High-traction polyurethane molded around a machined and anodized aluminum rim
Black anodized aluminum rims with machined rings and captive through-slots for tire tread
Tire tread composed of Shore A20 polyurethane for highest traction
Shore A45 tires are smooth, grippy, and stiffer for tougher applications
Rim material: 6061 Aluminum, anodized black
Tire material: Shore A20 or A45 polyurethane, vacuum-degassed
Coefficient of friction (against smooth unpainted MDF wood): μ=1.75
Shaft bores: Available in 3mm, 4mm, 6mm, and 0.5in
Hole pattern: Three through-holes for 4-40 screws on a 0.75in diameter circle
Keyway: 1/8" keyway and 0.5in bore, hub required to secure wheel to shaft
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.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor'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 RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
Refunds are processed within 7 days after receipt and inspection of the returned item.
A $100 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 RobotShop'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 RobotShop and ordered specifically to fulfill a customer request.
While the same return policy applies, these orders require a separate contact process for returns.
RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".
