Rear sprocket 420 37T D54mm

Rear sprocket 420, 37 teeth, D 54 mm — a toothed wheel on the rear hub. Together with the front sprocket and the chain it makes up the gearing: the tooth count decides whether the machine accelerates faster or runs faster on the straight.

• The mark 420 must match the mark on your chain, otherwise the teeth will not match its pitch
• 37 teeth — the figure from the name; it is not cast onto the sprocket itself
• The drawing marks two dimensions — 54 mm and 48 mm, both drawn between the mounting holes, and which means what is not stated
• Four mounting holes around the central bore and four lightening holes; steel, unpainted
• Replace all three parts together — on worn teeth, a new chain wears out quickly and stretches again
• With the same 420 pitch and 37 teeth, the list has two more sprockets — D 48 mm and D 76 mm; the teeth are the same, only the centre dimension differs
• You will find the other sprockets in the "Sprockets" category, and chains with their joining links in the "Chains" category

We write only what we know. The name gives D 54 mm, and the drawing has 48 mm standing next to 54 mm, and both are drawn between the mounting holes. Which figure is the central bore, and which is the hole spacing, we ask the maker and do not guess ourselves. Before ordering, copy the mark off your chain's side plate, count the teeth on the old sprocket and measure the mounting-hole circle and the central bore — we will check it before you order.

24-month warranty · tel. +370 685 777 56