Independently height adjusted rollers for maximizing workout and compatibilityAdjustable sliding frame with QR for the perfect fit with a variety of wheel base lengthsWheelbase adjustable from 970mm to 1,090mmLow noise and long term maintenance free rollerRustproof and lightweight alloy constructionRollerAdjustableWhite/SilverUPC/EAN/GTIN: 4944924406691