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Hi, Nate Taylor here. Please reach out to me at nate@sscycleworks.com for inquiries on parts availabilities and shipping estimates.

122mm Bolt Circle Diameter, 5-Bolt chainrings

122mm Bolt Circle Diameter (BCD), 5-Bolt chainrings on this page:
Stronglight 49D: 46-tooth
Stronglight 93: 45-tooth
Stronglight 105: 42-tooth black-anodized | 50-tooth

Back to master list of available chainrings

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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Stronglight 49D 46-tooth chainring. Used, $50.00/each

We are selling this inner ring

You can see some of the 46-tooth inner in this picture.

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Stronglight 93 45-tooth 122mm BCD chainring. Used, $50.00/each

Side one

Here's the other side of the ring.

Another view

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Stronglight 105 42-tooth 122 BCD black-anodized chainring. Used, $50.00/each

Side one

Here's the other side of the ring.

Three-quarter edge view

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Stronglight 105 50-tooth, 122 BCD chainring. New, $100.00/each

• This chainring was pulled from a new crankset about 40 years ago.

Side one

Here's the ring turned around

Three-quater edge view