diameter d and a cylindrical sleeve 84 having an outer diameter of d u2032 those skilled in the art will readily recognize that the self lubricating friction reducer 86 may be oriented such that the sleeve 84 is received by the upper knuckle 80 in which case the upper knuckle 80 should possess an opening having a diameter sufficient to receive a spindle 30 and the sleeve 84 of the self lubricating friction reducer 86 alternatively the self lubricating friction reducer 86 could have sleeves 84 extending from both sides of the oblique portion or bushing 88 in this instance both knuckles should possess a suitable opening 89 to receive the sleeve 84 in a further preferred embodiment the sleeve discussed above may be separate from the bushing referring again to fig6 the upper knuckle may possess an opening sufficient to receive a separate self lubricating sleeve that separates the spindle from the upper knuckle such a sleeve 93 is shown in each embodiment of the upper knuckle in fig2 3 5 and 6 in yet another alternative the lower knuckle may be designed to receive a separate sleeve such as that identified by the numeral 93 as with previous embodiments the knuckles self lubricating friction reducer and sleeves may be made of any suitable material provided the material possesses the requisite structural chemical and electrical properties self lubricating friction reducers including the.