4 in. HiGrip Wheel

am-2256

$8.00

FIRST Tech Challenge Note: This product is NOT legal for FTC. We recommend our Stealth Wheel for applications where digging into the surface is a concern. Product Overview: This is a 4 inch diame...Read More

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Product Overview

FIRST Tech Challenge Note: This product is NOT legal for FTC. We recommend our Stealth Wheel for applications where digging into the surface is a concern.

Product Overview:
This is a 4 inch diameter wheel with HiGrip tread. The design of this wheel is very similar to our popular 6" HiGrip wheel, but with a smaller, 4" diameter. We feel that these wheels are a more durable option for teams' drivetrains. While they provide good traction, they make for a maintenance-free wheel for the average team. Under normal circumstances, we feel that these wheels will last most FIRST Robotics Competition teams the entire season. No bearings or hubs are included in this wheel.

Usage:
Use #10-24x3/4 thread forming screws to attach sprockets or hubs to this wheel. Many thread locking materials are not compatible with polycarbonate and can eat away at the plastic. Be sure to check which adhesives are okay to use with this product. This link will allow you to check which materials are okay to use with what adhesives, https://bit.ly/loctitematerialcheck

With Axle and Hub:
  • If you wish to drive this wheel with an Axle and Hub, you can pick your hub by fitting any of the AndyMark hubs (not included) to this wheel. If this is your choice, then no bearing is needed. Use #10-24x3/4 thread forming screws to fasten a hub to this wheel.
With Sprocket:
  • If you wish to drive this wheel with a sprocket, then the sprocket needs to be attached to the side of the wheel, and two ball bearings need to be pressed into the wheel (one on each side). The ball bearing must have a 1.125" od. For a 1/2" id, use am-0181 or am-0029. For a 3/8" id, use am-0209. Use #10-24x3/4 thread forming screws to fasten the sprocket to the wheel.
With Bearings:
  • To press bearings into this wheel (for a free spinning wheel or for use with a sprocket), two ball bearings need to be pressed into the wheel (one on each side). The ball bearing must have a 1.125" od. For a 1/2" id, use am-0181 or am-0029. For a 3/8" id, use am-0209.

Specifications

  • Bolt Pattern: six holes (0.17 in. diameter) on a 1.875 in. diameter bolt circle
  • Bore: 0.95 in.
  • Diameter: 4 in.
  • Load Capacity: 100 lbs
  • Material: Polycarbonate, black, TPU (thermoplastic polyurethane)
  • Product Lifecycle: Other options available, <a href='/products/higrip-wheels-options?sku=am-2256'>see this product and other options here.</a>
  • Static CoF On HDPE: 0.31
  • Static CoF On Tight Pile Carpet: 1.07
  • Weight: 0.31 lbs
  • Width: 1.375 in.

Documents

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Returns

Returns are accepted within 30 days of purchase.
View our return policy here.

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23 reviews

  1. star star star star star 5 out of 5 stars

    Review

    5 Stars

    JR from Mission

  2. star star star star star 5 out of 5 stars

    Review

    5 Stars

    RR from Russiaville

  3. star star star star star 5 out of 5 stars

    4 inch wheels for ball launcher

    I think this is the best option for direct driving from a CIM

    FW from Imperial

  4. star star star star star 5 out of 5 stars

    Amazing grip on carpet

    5 Stars

    JT from Smyrna

  5. star star star star star 5 out of 5 stars

    Review

    5 Stars

    TM from Reidsville

  6. star star star star star 5 out of 5 stars

    Review

    5 Stars

    JS from Knoxville

  7. star star star star star 5 out of 5 stars

    "1.067?"

    "Looking at the specs of our current robot, I come across a coefficient of friction of 1.067, which should be physically impossible. I have a hard time believing this, although such a feat could be accomplished on a carpet. But still, the robot accelerates at a seemingly impossible rate, running 2 CIMs on each side, and we are loving this "omnipotent" traction."

    Ay from Minnesota

  8. star star star star star 5 out of 5 stars

    4 inch Hirip wheel

    Excellent service, reasonable price, fast shipment. I couldn't ask for better service.

    LG from Wichita Falls

  9. star star star star star 5 out of 5 stars

    Review

    5 Stars

    LB from Edmonton

  10. star star star star star 5 out of 5 stars

    4 inch HI Grip Wheel

    very good

    CA from Howell

  11. star star star star star 5 out of 5 stars

    Great Wheels: Excellent Grip, Robust, Inexpensive!

    FRC Team #1519, Mechanical Mayhem, used the 4" HiGrip Wheels on our 2014 Robot for our 8WD. We played 63 official matches this year, without any failures of the wheels or reasons to complain about them. The grip on the wheels is excellent, with manageable wear. We'd be game to use these again in the future!

    KS from Merrimack

  12. star star star star star 5 out of 5 stars

    "Great Wheels: Excellent Grip, Robust, Inexpensive!"

    "FRC Team #1519, Mechanical Mayhem, used the 4" HiGrip Wheels on our 2014 Robot for our 8WD. We played 63 official matches this year, without any failures of the wheels or reasons to complain about them. The grip on the wheels is excellent, with manageable wear. We'd be game to use these again in the future!"

    KS from Bedford

  13. star star star star star 5 out of 5 stars

    Great Traction

    Very nice wheels, good grip and tread.

    LR from Fresno

  14. star star star star empty_star 4 out of 5 stars

    It is a wheel

    What can I say, it is a wheel. We have not broken it yet

    ss from Bancroft

  15. star star star star star 5 out of 5 stars

    AM14U stock 4" high-mu wheels

    The AM14U is excellent straight out of the box with no modifications. I hope it performs similarly during the regional competitions.

    LY from Gambrills

  16. star star star star star 5 out of 5 stars

    Top Notch

    Too many years of top notch service and product from AndyMark

    BH from Port Perry

  17. star star star star star 5 out of 5 stars

    "4 inch high grip wheel"

    "The 4 inch wheels worked well in conjunction with the 6 inch high grip wheels for are ball retriever (the 24 inch exercise ball for the FIRST 2014 game)."

    HS from Middletown

  18. star star star star star 5 out of 5 stars

    Review

    5 Stars

    jr from florence

  19. star star star empty_star empty_star 3 out of 5 stars

    No compatibility with Tetrix parts

    To utilize these wheels with FTC/Tetrix, a custom adapter needs to be created. I would suggest AndyMark could sell a lot more of them if an adapter was also available. Other caution is the tread pattern is of fairly high durometer material and has square edges. These edges could damage the foam tiles used in FTC competitions. Radius-ing the tread edges in the mold would solve the problem.

    SF from West Chester

  20. star star star empty_star empty_star 3 out of 5 stars

    "No compatibility with Tetrix parts"

    "To utilize these wheels with FTC/Tetrix, a custom adapter needs to be created. I would suggest AndyMark could sell a lot more of them if an adapter was also available. Other caution is the tread pattern is of fairly high durometer material and has square edges. These edges could damage the foam tiles used in FTC competitions. Radius-ing the tread edges in the mold would solve the problem."

    SF

  21. star star star star star 5 out of 5 stars

    "Good move"

    "Okay - I took them to task for not having an adapter but they did add an adapter after we bought ours. Good move!!"

    Ay

  22. star star star star star 5 out of 5 stars

    Nice for FTC

    Great grip!

    DS from Fredericksburg

  23. star star star star star 5 out of 5 stars

    Review

    5 Stars

    KG from Vassalboro

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