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FingerTech Urethane Sumo Wheel (single)
FingerTech Urethane Sumo Wheel (single)
  • Description
  • Specifications
  • CAD Files
  • Reviews
• By popular demand, we have brought our experience from molding mini-sumo wheels into larger Sumo Wheels!
• Our high-traction polyurethane is molded in four sizes around a machined and anodized aluminum hub.

- The gold-yellow anodized aluminum hubs have a machined pair of rings and captive slots for keeping the tire in place.
- Tire tread composed of Shore A20 polyurethane makes these the highest traction wheels you can buy.
- The ShoreA45 tires are still smooth and grippy, but stiffer and harder to tear.  They are meant for applications where the wheels might take damage (from rough terrain or other robots).
  -Available in many different colors!  You can choose custom if you want something specific.  Add a note in the Additional Comments section during checkout!
- An extra-long setscrew allows you to easily tighten the wheels onto a 3mm motor shaft.
- Setscrew is accessed through tire. (Don't forget your 1/16" hex wrench) Sumo Wheel sizes Sumo Wheel sizes Sumo Wheel sizes 
Hub material: 6061 Aluminum, anodized gold-yellow
Tire material: Shore A20 and A45 polyurethane, professionally vacuum-degassed
   (A20 recommended for Sumo robots. A45 is for tougher applications where damage to the wheels is expected.)
Coefficient of Friction (against smooth unpainted MDF wood): μ=1.75 (Silicone μ=1.30, Rubber μ=1.05)
Outer Diameter: see table below
Length: 38.1mm (1.5in)
Inner Diameter: 31.75mm (1.25in)
Inner Depth: 31.75mm (1.25in)
Shaft bore: 3mm (0.118") - can be enlarged to any size up to 12.7mm (1/2")
Keyway: A 1/8" or 3/16" keyway can be added to bore size of 1/2".
6-32 Setscrew - uses 1/16" hex wrench

Outer Diameter44.45mm (1.75")50.8mm (2.00")63.5mm (2.50")76.2mm (3.00")
Weight61grams (2.15oz)83grams (2.93oz)126grams (4.44oz)178grams (6.28oz)

*It can take a day or two to mould your wheels - especially if the color is other than red.
Tip: Clean the tires with isopropyl alcohol wipes before each match for optimal traction.

Sumo Wheel hub dimensions 
8 Product Reviews - Average rating 5 / 5 (Show All)

Click to review this product

Best Wheels Ever

- 21st June 2016

I ran the Shore 45A version on a high torque 4WD beetleweight combat robot with almost 20 times its own weight in magnetic downforce. It was capable of pushing almost 100lbs on a steel table. The twisting force while steering was so high that it completely delaminated the urethane from the hubs, but the ribbed shape of the hub meant that the urethane stayed on and kept turning.


- 25th February 2015

Soft, gummy, and lightweight.

Note: These wheels will give you enough traction to make weaknesses in your drivetrain apparent! :)

Sumo Wheels

- 05th January 2015

Really good

SUMO wheel

- 31st October 2014

The sumo wheels of urethane have a great grip and with the weight of the sumo the wheels get crushed and that give to you more traction to your robot having a good motors and the correct weight you can have a very good traction.


- 25th April 2014


- 25th April 2014

Wheels have really excellent traction, they aren't heavy, and they look pretty cool :)

Click to review this product

Shore A20
Shore A45
Enlarge Bore/Keyway?
No change (3mm bore)
Enlarge Bore (enter size below) (+2.00 CAD)
1/2" Bore, 1/8" Keyway (+6.00 CAD)
 (Leave empty if not enlarging)
Price: 15.08 CAD
11.46 USD 10.31 EUR
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