Fork Tube Lengths4/23/2021
If you dont have one, deburr the steerer tube as best as possible with a flat file.When you buy a new fork, the steerer tube comes excessively long to allow for different head tube lengths and stem configurations.
We will be working on a 2020 Santa Cruz Hightower and mounting up a Fox 36 Grip2 fork. Follow step by step to make sure you get your steerer cut to the proper length. You can use a hack saw and Park Tool SG-6 saw guide for a clean and straight cut. Because of the tools we have here and what more people might have available to them, we are going to be using a pipe cutter and inner and outer reaming tool to get the job done. To do that, we can go ahead and set the crown race in to place. The crown race is pressed on to base of the steerer tube and is what makes contact with the bottom headset bearing. The crown race on 110 headset needs to be pressed on and not just slid on so we will be tapping it in to place with a plastic mallet. ![]() Get the headset ready to go and have the necessary stem spacers close by. The reason to test fit the fork is so you know exactly where to cut the steerer tube. For most all bikes, its best to use a minimum of 30mm of headset spacers to allow you to adjust the handlebar height on your bike. For this setup, I will be using three 10mm spacers and two 5mm spacers. Once the fork is slid in to the frame and dust cap of the headset has been installed, I will slide one 5mm spacer and two of the 10mm headset spacers on the steerer tube. Next, slide the stem on to the steerer tube and then one 10mm spacer on top of the stem. This is just a guess as to where I will like the height of my stem and handlebars to be. With 30mm of adjustment, there is plenty of room to make adjustments after riding the bike for the first time. Notice that I removed the 10mm spacer on top of the stem and slid a 5mm spacer in its place. Its important that the steerer tube is cut at least 5mm shorter than the top of the highest headset spacer. ![]() Grab the pipe cutter and cut the steerer tube on the line you just marked. ![]() If you have an inner and outer reaming tool, now is the time to clean up all of the edges of the steerer tube. We like to call the the inner and outer reaming tool a monkey in the barrel tool for obvious reasons.
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