ALPINESTARS SMX+ Boots - Black - US 6.5 / EU 40 2221019-10-40 Radiator Guards Performance Machine Off-Road wheel spacers

Performance Machine Off-Road wheel spacers are CNC machined from billet 6061-T6 aluminum

Front and rear boot bellows make with lightweight microfiber for increased durability and abrasion resistance

TPU ankle protection system incorporating a biomechanical link between the middle and bottom sections of the boot helping prevent damage to the leg by providing progressive force relief for torsional forces

I've seen common fixes to this by continuing to use softer metals and making the holes bigger which leads to failure in other places

ALPINESTARS SMX+ Boots - Black - US 6.5 / EU 40 2221019-10-40 Radiator Guards Performance Machine Off-Road wheel spacersAdvanced microfiber upper construction for lightweight high performance protection and superb levels of flexibility Front flex area is constructed with a soft microfiber for improving abrasion resistance and natural forwards and backwards movement Flexible accordion microfiber on Achilles gives enhanced natural movement Outside entry exit has stretchable accordion panel for a close fit and ease of entry and removal. Contoured high modulus shin plate