Greenspeed 15t Idler with Sidewalls and 10mm Bearing brand_ergon The 5in (125mm) wide T

The 5in (125mm) wide T Bar attaches to the other side of the elbow tube

MDS Nylon chainkeepers supported by M5 stainless bolts

5 cubic inches

If maximal minimalism is a thing

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Greenspeed 15t Idler with Sidewalls and 10mm Bearing brand_ergon The 5in (125mm) wide TCombines a 15 tooth sprocket with sidewalls to keep the chain in place on rough roads. Holes must face inward to prevent the idler from coming off the bearing. Non machined teeth and a 10mm inner diameter on the bearing. It has a 72mm overall diameter. Works on 2007 and earlier Greenspeed trikes.