Flap
ION Flap Wheels are designed for intakes and conveyance that need reliable performance when interacting with irregular or variable gamepieces. Similar to compliant wheels, they provide a flexible interface, but their flap-based design introduces intentional slip between the wheel and the gamepiece.
This helps smooth out transitions, reduce jams, and improve handling consistency across a wide range of shapes and materials. Each wheel is built from a durable polypropylene core with flexible TPR flaps that can be trimmed to width using the printed cut marks, allowing teams to tailor the wheel to their specific mechanism or gamepiece requirements.
1/2in Hex Flap Wheels

The 1/2in Hex Flap Wheels feature cut marks every 3.2mm on the flaps for consistent cutting, allowing for versatility and adaptability. These flap wheels have a solid 1/2in Hex Hub molded into the wheel.
These wheels come in three different durometers, outlined below. As the tread durometer increases the compliant flap gets harder which will change traction, wear, and compliance of the flap.
Specifications
Parameter:
Value and Units:
Flap Length:
4in (101.6mm) (end to end)
Hub Width:
0.5in (12.7mm)
Flap Width:
0.44in (11.1mm)
Durometer Specs
Hardness:
Color:
Durometer:
Soft
Light Gray
30A
Medium
Dark Gray
40A
Hard
Black
60A
Application Examples

2024 REV ION FRC Starter Bot Intake
On the 2024 REV ION FRC Starter Bot, the flap wheels on the intake aid in grabbing the CRESCENDO game pieces to be secured for the launcher.

The flap wheels spin while the intake is lowered to sweep game pieces into the compliant wheel rollers providing a further reach.
MAXSpline Flap Wheels

The MAXSpline Flap Wheels feature a MAXSpline bore and 6 flaps for higher load applications. The increased contact area and six independent flaps allow for more aggressive engagement.
Specifications
Parameter:
Value and Units:
Flap Length:
6.25in (158.75 mm) (end to end)
Flap Width:
0.94in (23.8mm)
Bore:
MAXSpline
Durometer Specs
Hardness:
Color:
Durometer:
Soft
Light Gray
35A
Medium
Dark Gray
50A
Hard
Black
75A
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