How Big A Chainring Do You Need? | GCN Tech Clinic

Published on January 9th 2019


Welcome back to the GCN Tech Clinic with our bike tech guru, Jon Cannings. This week he covers your questions around chainring size, 9-speed groupset compatibility and clearance issues with running a 28mm tyre.

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Jon covers lots more this week too, including questions around internal cable rattle, 30t cassette rear derailleur compatibility and how to cover unused cable holes in your frame. We hope Jon managed to help you out this week but be sure to get involved in the comments if you feel you have the answer to any questions!

Remember to keep your questions coming in for Jon using #askgcntech. 👇

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Photos: © Velo Collection (TDW) / Getty Images & © Bettiniphoto /

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