Shimano SM SH40 Pontoon Cleat Adapters. The Shimano SM SH40 Pontoon Cleat Adapters are a practical solution for adapting SPD cleats to use on smooth, road shoe soles. These pontoon cleat adapters simulate the recessed nature of SPD cleat set ups on mountain bike shoes and improve walking stability when off the bike. The road shoes must already be compatible with 2 bolt cleat systems.
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