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Due to the unfortunate COVID-19 Pandemic, we are currently experiencing an unprecedented volume of online orders, in person visits, and bike repairs.
We are doing our very best to fill orders, help customers, and keep your bikes working. Please expect to see some delays at this time.
Thank you for your understanding and patience.

Problem Solvers Head Tube Reducers

Problem Solvers Head Tube Reducers
Cannondale Headshock to 34mm
Please select options


The Problem Solvers Head Tube Reducers resize your head tube to accommodate different size forks. These fine aluminum reducers are designed for traditional, external-cup headsets. Please contact us for any questions about compatibility with your bicycle.

To use the reducers, leave the Cannondale Headshock cups in the frame, remove the cartridge bearings, then insert the reducers. They add 19.1mm to the headset stack height.

The Klein Reducers fit 2-inch inside-diameter Klein head tubes and add 12.7mm to the headset stack height.

WARNING: This product can expose you to chemicals including [name(s) of chemical(s)], which [is/are] known to the state of California to cause cancer and birth defects or other reproductive harm. For more information, go to

Part Numbers

Option UPC MPN
Cannondale Headshock to 34mm 708752010987 HD9902