Wtb thickslick flat guard tyreits all in the name thickslick made with a heavy duty casing designed to withstand the roughest urban conditions the wtb thickslick flat guard tyre provides the bite you need in the concrete jungle the nearly indestructible flat guard level with its urban armour casing and added rubber everywhere provides optimal protection to contend with any city streets its no wonder why this tyre has a cult following among couriers those not wanting to deal with flats