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1. A transmission comprising a transmission chain having right and left sets of link plates and arranged to travel in a predetermined direction, and a guide for sliding engagement with said link plates of the chain, the guide comprising:
an elongated synthetic resin shoe having a front surface on which said link plates can slide and a back surface, and a synthetic resin base for supporting said shoe, said base being elongated along the direction of elongation of the shoe and having a supporting surface engaged with said back surface of the shoe, and said shoe and base being integrally molded by two member molding; a pair of strips projecting from said supporting surface of the synthetic resin base and extending in parallel spaced relation to each other in the direction of elongation of the base; and a pair of concave grooves formed in the back surface of the synthetic resin shoe and extending in parallel to the direction of elongation of the shoe, each of said projecting strips of the base being received in, and fused to, one of said concave grooves formed in the back surface of the shoe, said grooves being positioned so that said right set of link plates of the chain slides on said front surface of the shoe at a location directly opposite one of said grooves of said pair and the left set of link plates of the chain slides on said front surface of the shoe at a location directly opposite the other of said grooves of said pair, and the thickness of the shoe, measured between the front surface and the back surface of the shoe at locations between said grooves, being greater than the thickness of the shoe measured between the front surface of the shoe and the part of each groove farthest from the back surface of the shoe.
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