This Chain Spanner enables high-precision chain adjustment. A special bolt enables axle adjustment in both directions and precise positioning by graded-scale. By applying the scale you can compensate serial tolerances. The axb chain spanner stays in the swing arm while rear wheel installation. Braces the axle against compressive- and tensile load.
Brilliant gilles.tooling design, easier rear wheel installation, unique, innovative axle block.
 Synto is the name of the 6x adjustable CNC high-precision...
 
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