FingerTech Urethane Sumo Wheel (single) #1FingerTech Urethane Sumo Wheel (single) #2

FingerTech Urethane Sumo Wheel (single)

Price: 16.22 CAD
11.95 USD 11.06 EUR

• 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.

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Updated Oct 2023! The new design now separates the wheel from the hub, so you can swap between robots with different motor shaft sizes without having to buy a whole new set of wheels!

• 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 rim.

Features:
- The black anodized aluminum rims have a machined pair of rings and captive through-slots for keeping the tire tread 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! All wheels are made to order, and colors may differ slightly between batches.
- Remember to order a matching number of Sumo Wheel Hubs in the bore diameter of your choice.
Sumo Wheel sizes
Specifications:
Rim material: 6061 Aluminum, anodized black
Tire material: Shore A20 and A45 polyurethane, professionally vacuum-degassed
(A20 recommended for Sumo robots up to 6kg (13lb). 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
Width: see table below
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".


 44.45mm (1.75in) OD50.8mm (2.00in) OD63.5mm (2.50in) OD76.2mm (3.00in) OD
Width25.4mm (1.0in)25.4mm (1.0in)38.1mm (1.5in)38.1mm (1.5in)
Inner Bore25.4mm (1.0in)25.4mm (1.0in)38.1mm (1.5in)38.1mm (1.5in)
Weight36.7grams (1.29oz)48.5grams (1.71oz)123grams (4.33oz)171grams (6.02oz)

Sumo Wheel sizes
Sumo Wheel sizes Sumo Wheel sizes
(Color examples are shown with old style rims)

*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.

 
Coming soon!
9 Product Reviews - Average rating 5 / 5 (Show All)
My go-to wheel going forward
- 28th March 2022
These wheels are battle tested. Some damage to the hubs but they still function perfectly. Taking direct hits from a horizontal, a drum bot, and being sent into the walls. These will be my go-to wheel going forward.
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.
Grippy!
- 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.
Great!
- 25th April 2014
Great!
- 25th April 2014
Wheels have really excellent traction, they aren't heavy, and they look pretty cool :)
Wheels
- 21st February 2014
Very Good quality and excellent service.
Awesome
- 22nd February 2013
these wheels are so amazing, the amount of grip that they have on surfaces is amazing!!! great for pulling robots.
FingerTech Sumo Wheel Hub (single)

• 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.

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