128mm Bolt Circle Diameter, 5-Bolt chainrings

128mm Bolt Circle Diameter (BCD), 5-Bolt chainrings on this page:
Nervar Star: 52-tooth

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Bolt Circle Diameter is the diameter of the circle formed by the centers of the chainring fixing bolts. With 4-bolt cranksets, this is easy to measure. 5-bolt cranks are more difficult.

If you are unsure about what size chainring you need, Wolf Tooth Components has an excellent guide to measuring your rings.

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Nevar Star 52-tooth 128 BCD Chainring. Used

Earlier versions (think 70s Bike Boom) of the Nervar Star crankset used a proprietary 128mm bolt circle diameter. Later versions have 122 BCD rings, the same as traditional Stronglight. These rings are 128 BCD.

We have two: #1 | #2

Nevar Star 52-tooth 128 BCD Chainring #1. Used, $50.00/each

Here's a rare item!

The other side of the ring.

Nevar Star 52-tooth 128 BCD Chainring #2. Used, $35.00/each

Side 1

Side 2