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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.

86mm Bolt Circle Diameter, 5-Bolt chainrings

86mm Bolt Circle Diameter (BCD), 5-Bolt chainrings on this page:
SR: 34-tooth | 40-tooth | 47-tooth | 50-tooth

Back to master list of available chainrings

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86mm BCD chainrings fit Stronglight 80, 99, 100 and some SR cranksets

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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SR-Sakae 34-tooth 86mm BCD chainring. Used, $45.00/each

Side one

Side two

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SR-Sakae 40-tooth 86mm BCD chainring. Used, $45.00/each

This ring has miles to go before it sleeps

Here's the back side

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SR-Sakae 47-tooth 86mm BCD chainring. Used, $45.00/each

This ring will work on many older Stronglight as well as some SR cranksets.

Here's the ring flipped around

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SR-Sakae 50-tooth 86mm BCD chainring. Used, $45.00/each

Side one

And side two.