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Spinfinity Kinpinless Dual Caster Series with TerraTech Ultra Wheels


The new TerraTech Ultra Press-On Wheels are Hamilton's answer to applications running up to 10 mph continuously (24/7) and carrying heavy loads up to 13,000 lbs. Two primary design features provide the continuous duty rating: 1) the face or running surface of the TerraTech Ultra tire is CNC-machined with only 0.015" total run-out providing our smoothest riding press-on and prolonged wheel work-life and 2) the TerraTech Ultra compound is formulated similar to our DuraGlide Wheels and represents our coolest running press-on wheel. The TerraTech Ultra is also your best choice of a polyurethane press-on wheel for outdoor applications.

To support the high speeds and provide greater rollability, engineers equipped the new TerraTech wheels with massive double-stacked maintenance-free precision ball bearings. Also, the extra-thick, extra-wide solid tires feature a bond to the rim that is guaranteed to never fail. The replaceable tire & steel rim are "pressed on" to a heavy duty 1045 steel core cnc-machined to tight tolerances.

Caster Engineering Tools

These calculators apply to any caster application—even if you’re browsing a different category. Use them to estimate load rating per caster, select wheel material, and estimate push/pull force. Expand any tool for full analysis + a share-ready spec line.

CasterSpec Load Calculator
Fast estimate. Expand for safety factor + uneven floor + spec output.
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Load
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Base per caster
Worst-case per caster
Recommended rating
Spec output (auto-generated)
Tip: paste into RFQs / threads. Expand tool for advanced inputs.
WheelMatch Material Selector
Fast recommendation. Expand for noise, duty cycle, floor protection.
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Wheel
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Primary recommendation
Good alternate
When to avoid
Spec output (auto-generated)
Engineers share tools that output a clean “why” line.
PushForce Push/Pull Calculator
Estimate effort fast. Expand for operators, materials, bumps, startup mode.
Expand full push/pull
Push
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Estimated total force
Per operator
Pass / target
Spec output (auto-generated)
If effort is high: bigger wheels + better material + smoother path wins.
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