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Problem Solvers Head Tube Reducers

Problem Solvers Head Tube Reducers
Cannondale Headshock to 34mm
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Please call us at 303-444-4196 with any compatibility questions! We are always happy to help.


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 lead, 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