DEMOUNTABLE RIMS.

Hawera Star, Volume XLVI, 30 July 1927, Page 12

DEMOUNTABLE RIMS.

| CARE IX FITTING REQUIRED. Most cars to-day are equipped with demountable rims, Unless, however, a certain amount of care is taken when preparing to make the change of rim with its blown-up tyre after a puncture, as much, and even more, work may be required. Care, also, must be taken to have the trim true on the felloe of the wheel, or the tyre will not run true. This means that it will wear out quickly. No doubt, when driving, you have often observed the tyre of some ear in front of you wiggling along the road, and have said to yuorself that the car had a bent axle. If you had noticed the hub you would have seen that it ran true, the tyre only being out. The fault was in putting on the rim. In order to have the demountable rim tight upon the felloe of the wheel, practically all rims are made secure by means of wedges. These wedges may

be in the form of rings, or may be six or eight- short wedges. The way to put on a rim is as follows: First scrape with a file or sandpaper all rust from the rim and felloe band. Then turn the wheel so that the valve stem is on top. Then lift the top of the rim on to the wheel, inserting the valve stem in its hole, and when satisfied that the lug near the valve stem and on the inside of the rim will properly fall into its hole on the felloe, “slam on” the bottom of the rim. Next, put on the wedge ring (if that type of rim) and screw on all of the lugs by hand. Then with a tool turn in bolt No. 1 until a gentle squeeze is required, then No. 2, then Nos. 3,4, 5 and (>, after which go round the rim a number of times, giving each nut a half turn until all are tight. Difficulty in getting the rims on the wheels is usually due to one of three causes: The rim may be bent or wheel warped; there may be rust on the rim or felloe band; the valve stem may not be in the centre of its hole in the rim.