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HTD Timing Pulleys (8 choices)

In stock
Compatible with products and accessories.
FTC, FRC legal.

Synchronous timing belts are lighter and more efficient than chain. Once set up, they require no tensioning or adjustment. The HTD profile is ideal for FIRST ® Robotics Competition applications - its deep tooth profile allows it to better handle high reversing loads, such as those found in an FIRST ® Robotics Competition drivetrain. Each year, more and more FIRST ® Robotics Competition teams make the design switch to belts and attain superior performance.

VEXpro timing pulleys are custom machined from high strength aluminum and black anodized for light weight and superior performance.

9mm Pulleys
Grouped product items
Product Name SKU Qty
18T x 9mm Wide Double Flange Aluminum Pulley (HTD 5mm, 1/2” Hex Bore) 18T x 9mm Wide Double Flange Aluminum Pulley (HTD 5mm, 1/2” Hex Bore)
$12.99
217-3225
24T x 9mm Wide Double Flange Aluminum Pulley (HTD 5mm, 1/2” Hex Bore) 24T x 9mm Wide Double Flange Aluminum Pulley (HTD 5mm, 1/2” Hex Bore)
$12.99
217-3227
30T x 9mm Wide Double Flange Aluminum Pulley (HTD 5mm, 1/2” Hex Bore) 30T x 9mm Wide Double Flange Aluminum Pulley (HTD 5mm, 1/2” Hex Bore)
$15.99
217-3229
36T x 9mm Wide Double Flange Aluminum Pulley (HTD 5mm, 1/2” Hex Bore) 36T x 9mm Wide Double Flange Aluminum Pulley (HTD 5mm, 1/2” Hex Bore)
$16.99
217-3231
9mm Or 15mm Pulleys
Grouped product items
Product Name SKU Qty
18T x 15mm Wide Aluminum Pulley (HTD 5mm, 1/2" Hex) 18T x 15mm Wide Aluminum Pulley (HTD 5mm, 1/2" Hex)
$12.99
217-4100
24T x 15mm Wide Aluminum Pulley (HTD 5mm, 1/2" Hex) 24T x 15mm Wide Aluminum Pulley (HTD 5mm, 1/2" Hex)
$12.99
217-4101
30T x 15mm Wide Aluminum Pulley (HTD 5mm, 1/2" Hex) 30T x 15mm Wide Aluminum Pulley (HTD 5mm, 1/2" Hex)
$15.99
217-4102
36T x 15mm Wide Aluminum Pulley (HTD 5mm, 1/2" Hex) 36T x 15mm Wide Aluminum Pulley (HTD 5mm, 1/2" Hex)
$16.99
217-4103

Timing Belt Length Calculator

If used correctly, VEXpro timing belts require no tension adjustment once assembled into a drivetrain or other mechanism. Use the West Coast Products center-to-center distance calculator to ensure your robot is properly designed and you know exactly what to order.

6061 T-6 Aluminum

Black Anodized

9mm Pulleys
18T - 0.03 lb
24T - 0.07 lb
30T - 0.09 lb
36T - 0.12 lb


15mm Pulleys
18T - 0.05 lb
24T - 0.10 lb
30T - 0.12 lb
36T - 0.16 lb