Sprintbok Curved Treadmill
$8,699as of Nov 5, 2026Hardwood, linoleum, composite, coated steel, electronics
Treadmills
A motorless curved treadmill moves only when you do. The most natural one we found has a solid hardwood frame and wooden slats. 1 pick, prices as of Nov 5, 2026.
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The picks
Before you buy
No fully natural or plastic-free treadmill exists, motorized or not. The best we found still has composite parts in the slats, powder-coated metal, bearings, a monitor and a sealant.