Edson Marine XL PowerKnob Strap:
Edson's PowerKnobs are equipped with two straps that fit wheels with diameters from 5/8-inch to 1-1/8-inch. But sometimes the wheels rim is slightly larger and not perfectly circular so Edson now offers an extra large strap that will allow you to attach an Edson PowerKnob to a rim with a max circumference of 3.75-inches!
Click Here see how to install an Edson ComfortGrip™ PowerKnob using straps!
ProSeries PowerKnob (969ST-18)$148.00
Sport PowerKnob (967-18BL)$112.00
Polished Stainless Steel ComfortGrip PowerWheel$588.00 - $738.00