The SpeedSync uses Stainless Bearings

Compatibility:(all sold separately) Lezyne Handlebar Mounts

ABS Hard Plastic Shell with EPS Liner

While these will work with most drop bars they can only flex so much and won't fit bars with really tight bends

There are no shims required

100 Percent Strata 2 Goggles - One Size Fits Most - Red - Red Mirror Lens PLP|Colour The SpeedSync uses Stainless BearingsLeading the charge of premium performance at value, the Strata 2 is the essential riding goggle. From trail to track, the Strata 2 offers a near limitless field of view for our top athletes and comfort for the everyday rider. Improved fitment and seal with increased field of view Supports triple post tear offs for secure fitment Ultra thick double layer face foam manages sweat 40mm wide silicone coated strap keeps goggles in place 9 point lens