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FAQ

What changes will I see to my bikes geometry if I fit an angle headset?

The head angle of your bike will have a large effect upon how it rides, in simple terms a 'slacker' head angle will give your bike a more stable feeling than a bike with a 'steeper' head angle. Over time the head angle of bikes has reduced, with the slackest bikes being around 62° and the steepest around 70°.

Downhill bikes will usually have the slackest head angle of all types of bike, with XC bikes being steepest due to the quite specific type of riding they have been designed for. Trail and Enduro bikes usually sit somewhere in the middle as they are designed to work well for various different riders and terrain. 

Fitting an angle headset will make various changes to your bikes geometry; a 1.0 degree headset will lengthen your wheelbase by around 10mm, lower your bottom bracket by 2mm and change what is referred to as your bikes 'trail', all of which will alter the way your bike feels. Just like we are not all the same size, we don't all ride in the same places and with the same style. Angle and Geometry Adjust Headsets gives you the opportunity to tailor your bikes geometry to suit your own preferences. 

What do all of the numbers and letters used to label different headsets mean and how do I find the correct size?

AnswerWe use the 'SHIS' standard to label our headsets - the numbers refer to the internal diameter of the headtube and the letters the type of headcup: EC = 'External Cup' and ZS = 'Zero Stack'  - For more SHIS info please refer to the Park Tools information page  - Standardized Headset Identification System | Park Tool

Your bicycle manufacturer will often list the size of headset on its webpage - if this is not the case you will need to first identify if your frame uses a headcup or is an IS / Integrated model (see below) - If a headcup is used you need to find the internal diameter of the upper and lower part of the headtube, if you are not able to access this information please send us an email where we will do our best to help.

My frame uses an (IS) integrated headset - Do you have a headset that will fit?

With the IS or Integrated headset the bearing drops directly into the frames headtube and a headcup is not used - we do not currently have a headset that will work with this type of headtube.

My frame comes fitted with a ZS44 upper cup, can I fit the EC44 option?

As standard most frames with a 44/56 headtube will come fitted with a ZS44/ZS56 headset. You will however be able to fit the EC44/ZS56 headset as it has the same diameter. The difference between the two will be the upper cup stack height - the height of each of our headsets is listed on the items page.

What is the 1 1/8" Reducer Crown and do I need it?

The reducer crown allows you to fit a 1 1/8" straight steerer tube fork to a headset designed to work directly with a tapered fork - for example our ZS44/ZS56 Tapered headset will work with a straight steerer 1 1/8" Fox 40 by fitting the reducer crown.

Are any other parts needed to fit my headset and do I need special tools to install it?

All headsets are provided complete and ready to fit, including headcups, bearings, crown race and topcap and starnut.

You do not require any special tools to install one of our angle or reach adjust headsets other than a headset press, we advise taking the bike to a good local bike shop if you are not a confident home mechanic.