ALPINESTARS SMX-S Boots - Black/White - US 7.5 / EU 41 2223517-12-41 Cam Chain Tensioner allowing the use of wideband

allowing the use of wideband oxygen sensors

These are an improvement for any level of rider

Improved power transfer though the clutch

Next generation

ALPINESTARS SMX-S Boots - Black/White - US 7.5 / EU 41 2223517-12-41 Cam Chain Tensioner allowing the use of widebandDurable microfiber upper construction that has superb flexibility and a comfortable feel Ergonomic new forefront boot shape is streamlined to better control and feel of the motorcycle controls Thermoplastic Polyurethane (TPU) shin plate protector is race developed for superior impact and abrasion resistance Lateral Thermoplastic Rubbery (TPR) injected ankle support construction provides superior comfort and impact resistance TPU double density ankle