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Project Sports

Questions and answers about sports

Seat post bolt sheared off – twice

4 min read

Asked by: Faith Miles

How do you adjust a 2 bolt seat post?

Quote from video: We can slide one side of the saddle out and now the rails have come out and the new saddles it's going to sit right in between.

Why does my seatpost keep slipping?

The main reason for a slipping seatpost is too little friction between the seatpost and seat tube. The first cause is a clamp that isn’t tightened enough. Because of the load on the seat post while cycling, it slowly slips down. This is a very common issue!

How do you fix a seat post clamp?

Quote from video: Through reinstalling the new or existing clamp is just as easy remove the bolt slip the cable through the gap and install the clamp.

How does a seat post clamp work?

The seat post clamp goes around the top of the tube. When the clamp bolt is tightened, the frame material flexes slightly (the slot allows this flex to occur) and tightens against the seat post. This, of course, is what holds your post in place.

What size are seatpost bolts?

Seat Binder

Fasteners: One or two 4, 5 or 6mm binder bolts, on the clamp at the top of the seat tube right above the top tube. Purpose: Secures the seatpost at the right height inside the seat tube.

What is a micro adjust seatpost?

Micro adjust seatposts utilize a more effective clamp that usually involves one or two bolts which tighten on the saddle above and below the rails. If you’re a racer or fast recreational rider trying to build a ride that’s as light as possible, you’ve probably realized seatposts can be relatively heavy.

Should you grease your seatpost?

Over time, metals like an aluminum seatpost and a steel seat tube can fuse through oxidation or bind through friction. Simply applying a coat of grease between the two provides a barrier against corrosion.

How do you install a seat post clamp?

Quote from video: For the seat post. You use carbon assembly compound it also gives you better clamping. And the juicy pose doesn't start to slide down in your frame. Take your seat post.

Why does my bike seat keep coming loose?

The most common reason for a bike seat coming loose is a loose bolt or fitting. This can happen because of dirt and grime building up, because it’s the wrong size post, or because the bolt isn’t tightened enough or has become stripped. If you ride frequently, it’s bound to happen to you too.

How do you measure a seatpost bolt?

You grab the clamp ears in the lug and measure that outside to outside. In the bolt you close it all the way and then measure inside to inside.

What size is a M5 bolt?

Metric clearance and tapping drill hole sizes.

Size Clearance Hole mm Tapping Drill (std Pitch)
M5 5.5 4.2 mm
M6 6.5 5.0 mm
M8 9 6.75 mm
M10 11 8.5 mm

How do you measure bolt size?

To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is called the major diameter and will usually be the proper size of the bolt.

How do you adjust a seat post?

Quote from video: You stand next to your bike. Set the saddle to the height of your hip bone as a starting point each seat post is marked with a minimum insertion.

How do you adjust the angle on a saddle?

Quote from video: Take your allen key and loosen the bolt or bolts clamping the saddle to the seat post. When the saddle is loose enough to move up and down take your spirit level and place it on the top of the seat.

How do you adjust bike seat screws?

Quote from video: It is a six millimeter allen tool and simply and it will be tight from the factory. Loosen the allen bolts. Just enough to then you can move it on the rail. And you can also adjust the tilt.

How do you adjust a specialized seatpost?

Quote from video: And it should just pop right off then in the back here you have a four millimeter allen key so it's a wedge style.

Can I put a longer seat post on my bike?

You can adjust the seat post by making it higher (may require a longer seat post than you currently have). Also, some seat posts are straight, whereas others have a setback. The later will move the seat slightly further back on the bicycle.

How do you tighten a bike seat clamp?

Quote from video: They're very easy to adjust you simply start by loosening. The single pinch bolt. And once that is done you can slide the saddle fore and aft changing. Your adjustment.