What size star nut do I need?

Asked by: Stephanie Bell

– The right size must be chosen to make sure it adapts fine to the interior of the steerer tube. – To choose the right size, measure the fork’s internal diameter and choose a star nut that’s 1 to 3mm bigger than the size measured.

Are all star nuts the same size?

Available in 18mm, 23mm and 26mm diameter. The star nut with a diameter of 23mm fits standard alloy steerers with 4 or 5 mm wall thickness. The star nut with a diameter of 26mm fits standard steel steerers or alloy steerer tubes with 3mm or less wall thickness.

How far down should a star nut be?

Star Nut Installation with TNS-1



Hold tool aligned while striking TNS. The TNS places the nut about 15mm (9/16″) below the top of the steering column. This allows the adjusting bolt to thread fully into the nut for adjustment pre-load. It can also help maintain alignment to use the stem as an alignment guide.

Can you replace a star nut?

You may need to replace your star nut if it's damaged they don't often get damaged or if you've cut your steerer tube down or if you're installing a new fork star nuts only really get damaged.

Do you need a star nut?

It isn’t mandatory to use a star nut and there are ways to adjust a stem/fork interface without one, but it isn’t typically a “beginner” skill.

What size is a top cap bolt?

TRADITIONAL HEADSET CAP



The cap is 32mm (for 1 1/8″ headsets) in diameter and the bolt is an M6 Cap Head Bolt made from aluminium, stainless steel or titanium.

What is a star nut for?

The star fangled nut — or ‘star nut’, as it’s known — is pressed into the steerer tube and allows the fork and headset components to be pulled into place in the frame’s head tube. If you have a new fork or have just cut down your steerer tube, you may need to fit a new star nut.

Can I reuse a star nut?

Have you got a star nut for the top of the fork.? You can reuse the old one if the steerer tube is the same diameter all the way down which will allow you to knock the old one all the way through. To fit the star nut, screw in a bolt and tap the star nut down into the fork by a about CM.

How do you install a star nut without a tool?

Now the next part is to get this top cap installed in that steering tube screw. It in. And then use the top cap to kind of guide. It.

How do you straighten a star nut?

Put an old top cap on the bolt, tighten it with an Allen key so that it clamps wonkily against the steerer, whack it with a hammer, star fangled nut is now straight.

Can you use a star nut on carbon forks?

Never use a star nut with a carbon steerer tube fork (Figure 7). Star nuts can only be used with aluminum steerer tube forks. Use only a compression device designed for carbon steerers.

Do forks come with star nut?

Typically forks do not come with a star nut. New headsets do, though. Your LBS should have a new star nut for you to shove in there. America eats its young.

How do you use a star nut tool?

Brace the fork legs against the floor positioning a rag or other padding to protect the dropouts. Place the star net into the steerer tube. And use the hammer to tap the net into the tube.

How do you drive in a star nut?

So the star nut is thread it on to the end of the tool. Like that and then using a hammer you would drive this down in there and the tool would hold the start straight.

How do you change a star nut in a steerer tube?

So what you can do is take maybe like a long screwdriver push. It in here and then use a hammer. And this push. The star fangled nut down and push it out through.

What is a fork crown race?

There is a crown race installed at the base of your fork’s steerer tube – a crown race is an angled surface, or race, that interfaces with the bottom bearing.

Do I need headset spacers?

Put simply, headset spacers enable you to easily adjust the height of your handlebars, which is an essential element of bike fit for BMX, MTB and road riders. In the particular case of the latter (road cycling), the correct bar height is key for comfort and performance.

How do I know my Crown race size?

The fork crown race is seated onto the fork crown. Generally this is press fit, with the inside diameter of the crown race being smaller than the fork crown. To determine the fit, measure both the inside diameter of the fork crown race and the outside diameter of the fork crown.

Can you buy a Crown race?

Crown Races are not available for individual sale.

What is Crown race diameter?

The crown race ID is 26.5mm rather than 26.4mm and the threads are a tiny bit different, but ISO headsets are so close that they work absolutely perfectly on Italian frames. French sized frames use a 25.0mm steerer with a 22.0mm ID. The crown race is 26.5mm and the pressed race is 30.2 mm.

Are Crown races headset specific?

NO! Not all headset cups and crown races are the same. There are different angles on the bearings both the inner and outer surfaces. You need to make sure that the cups and races match the bearings.

How do you get rid of a crown race?

Take the screwdriver and just put it down on the base. Of the crown race and just tap it a little bit flip. It over the other. Side. Tap it down a little bit and just go back and forth.

Can you reuse Crown race?

Yeah. I’ve used the same one on three sets of forks. never had a problem doing this, the thought that it might deform, has never even crossed my mind. yes tap carefully, and it’ll come off fine.

How do you fit a crown race without tools?

So it's pretty simple stuff again just pvc some razor blades hammer.

How do you make a crown race setter?

Where you put the Crown race on and then. I just drop it on just kind of you know make sure it goes on straight and push it on with your fingers. To get it snug.

How do you seat a crown race?

Don't take this guy here right shove it right on top. Because you can see it fits perfectly right there grab yourself your rubber mallet. Right. Here.