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Straight Flex Wheels (21 Choices)

As low as $0.00
In stock
Compatible with products and accessories.
FTC, FRC legal.

Developed in collaboration with West Coast Products, Straight Flex Wheels are for use with intakes, conveyor systems and shooters.

Flex Wheels are made of a super tough custom blend of silicone rubber - different than any other flexible or compliant wheel currently used by FTC or FRC teams. Click here to learn more about why silicone rubber makes Straight Flex Wheels the best intake wheel on the market.

Each of our four wheel diameters are offered in 3 different durometers: the super soft 30A in light gray, the medium hardness 40A in dark gray and the hardest 60A in black. The varying hardnesses can be used to change the traction and compliance of your mechanism.

The 1-5/8" and 2” diameter wheels have a 9mm hex, which is meant to be stretched on to a 1/2" hex shaft. The 3” and larger wheels have a 1” bore, which can be stretched over a VersaHub so they can be driven by a hex shaft, VersaPulley or plate sprocket. This also allows you to stretch these wheels over a VersaRoller tube to create a strong and lightweight roller.

1.625"
2"
3"
4"
5"
30A
40A
60A
Wheel Size Durometer Flex Wheel SKU
1.625" 30A Straight Flex Wheel (1.625" OD x 1/2" WD, 1/2" Hex Bore, 30A) 217-6350
Straight Flex Wheel (1.625" OD x 1/2" WD, 1/2" Hex Bore, 30A) (10-pack) 217-8063
40A Straight Flex Wheel (1.625" OD x 1/2" WD, 1/2" Hex Bore, 40A) 217-6351
Straight Flex Wheel (1.625" OD x 1/2" WD, 1/2" Hex Bore, 40A) (10-pack) 217-8065
60A Straight Flex Wheel (1.625" OD x 1/2" WD, 1/2" Hex Bore, 60A) 217-6352
Straight Flex Wheel (1.625" OD x 1/2" WD, 1/2" Hex Bore, 60A) (10-pack) 217-8067
2" 30A Straight Flex Wheel (2" OD x 1/2" WD, 1/2" Hex Bore, 30A) 217-6353
Straight Flex Wheel (2" OD x 1/2" WD, 1/2" Hex Bore, 30A) (10-pack) 217-8064
40A Straight Flex Wheel (2" OD x 1/2" WD, 1/2" Hex Bore, 40A) 217-6354
Straight Flex Wheel (2" OD x 1/2" WD, 1/2" Hex Bore, 40A) (10-pack) 217-8066
60A Straight Flex Wheel (2" OD x 1/2" WD, 1/2" Hex Bore, 60A) + $4.99 217-6446
Straight Flex Wheel (2" OD x 1/2" WD, 1/2" Hex Bore, 60A) (10-pack) 217-8068
3" 30A Straight Flex Wheel (3" OD x 1" WD, 1-1/8" ID, 30A) 217-6447
40A Straight Flex Wheel (3" OD x 1" WD, 1-1/8" ID, 40A) 217-6448
60A Straight Flex Wheel (3" OD x 1" WD, 1-1/8" ID, 60A) 217-6449
4" 30A Straight Flex Wheel (4" OD x 1" WD, 1-1/8" ID, 30A) 217-6450
40A Straight Flex Wheel (4" OD x 1" WD, 1-1/8" ID, 40A) 217-6451
60A Straight Flex Wheel (4" OD x 1" WD, 1-1/8" ID, 60A) 217-6452
5" 30A Straight Flex Wheel (5" OD x 1-1/2" WD, 1-1/8" ID, 30A) 217-6453
40A Straight Flex Wheel (5" OD x 1-1/2" WD, 1-1/8" ID, 40A) 217-6454
60A Straight Flex Wheel (5" OD x 1-1/2" WD, 1-1/8" ID, 60A) 217-6455

When to use Straight Flex Wheels?

Flexible or compliant wheels have many useful applications on a robot from intakes to conveyors to shooters. 

Intakes

Hard and firm game objects usually require some type of compliance in order to intake them into your robot. This means you either need the intake to give and move to accept the game object. That’s where Straight Flex Wheels come in handy. The flexibility of the wheel can help give your intake compliance to pick up firm game objects.

Conveyors

Straight Flex Wheels can also help move game objects through your robot. For example, funneling game objects can be very challenging. Inevitably two objects will get jammed together which means you’ll need some means of preventing this from happening. One possible solution is using Straight Flex Wheels. 

You can use two different size and/or durometer wheels on the same shaft (ex: 2” on one side and 1.625” on the other). The objects contacting the 2” wheels will move faster than the objects contacting the 1.625” wheels. If these objects ever get jammed, the 1.625” wheels will have less compression (and therefore less grip) on the objects. This way when they jam the objects in contact with a 1.625” wheel will likely yield to an object in contact with a 2” wheel.

Shooters

Similar to intakes, some types of shooters require compliance to be effective. Using a Straight Flex Wheel as the wheel in your shooter is an easy way to build in this compliance without having to make other parts of the shooter system compliant.

Durometer determines how soft or hard the wheel is. For example, a 30A Straight Flex Wheel will be softer and a 60A Straight Flex Wheel. The durometer can have a big impact on your application. For example, the softer the wheel is the more compression you can build into your system. Another example would be a flywheel shooter spinning at several thousand RPM. At these speeds any flexible or compliant wheel is going to expand. The softer the durometer, the more a wheel is going to expand. This expansion could have an adverse effect on the shooter’s performance. 

We recommend experimenting with different durometers to help you optimize your specific application.

The VEXpro Straight Flex Wheels use a custom blended silicone rubber instead of the TPU (Thermoplastic Polyurethane) and TPE (Thermoplastic Elastomer) used on other similar wheels in the FRC and FTC market. 

Silicone rubber has several properties that make it advantageous for flex wheels:

  • Hypoallergenic so it’s safe for all students to handle
  • Good chemical resistance to cleaners and solvents (Click here for cleaning instructions)
  • Great wear characteristics
  • High tear strength
  • High elasticity

In addition to the natural benefits of silicone rubber, Straight Flex Wheels have a sticky additive mixed in, giving them additional grip than other flexible and compliant wheels.

During use, Straight Flex Wheels can pick up dirt and debris from the playing field. Over a period of time this dirt and debris may cause the wheels to lose their grip. To prevent this, we recommend frequently cleaning your Straight Flex Wheels so you don’t lose performance. Here’s how we recommend cleaning Straight Flex Wheels:

  1. Dampen a clean cloth towel or rag with isopropyl alcohol.
  2. Touch the damp cloth towel or rag to a Straight Flex Wheel
  3. Spin the wheel in the cloth until the dirt and debris is gone. 
  4. Repeat steps 2 & 3 on all Wheels

Silicone Rubber with Sticky Additive

30A Durometer Wheels
217-6350: 1.625" OD Straight Flex Wheel - 0.03 lbs
217-6353: 2" OD Straight Flex Wheel - 0.04 lbs
217-6447: 3" OD Straight Flex Wheel - 0.17 lbs
217-6450: 4" OD Straight Flex Wheel - 0.26 lbs
217-6453: 5" OD Straight Flex Wheel - 0.55 lbs


40A Durometer Wheels
217-6351: 1.625" OD Straight Flex Wheel - 0.03 lbs
217-6354: 2" OD Straight Flex Wheel - 0.04 lbs
217-6448: 3" OD Straight Flex Wheel - 0.18 lbs
217-6451: 4" OD Straight Flex Wheel - 0.28 lbs
217-6454: 5" OD Straight Flex Wheel - 0.58 lbs


60A Durometer Wheels
217-6352: 1.625" OD Straight Flex Wheel - 0.03 lbs
217-6446: 2" OD Straight Flex Wheel - 0.04 lbs
217-6449: 3" OD Straight Flex Wheel - 0.19 lbs
217-6452: 4" OD Straight Flex Wheel - 0.29 lbs
217-6455: 5" OD Straight Flex Wheel - 0.60 lbs