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Project Sports

Questions and answers about sports

Why are bolts on bikes so wide?

4 min read

Asked by: Crystal Martin

What size bolts are used on bicycles?

Fasteners: Usually one 3 or 4mm hex bolt on the underside of the bottom bracket shell; not all bikes have one. Purpose: Guides the front and rear derailleur cables; also secures them to the frame.
Apr 14, 2022

What size are bike stem bolts?

Essentially, a face-plate stem bolt is used to cinch down a stem to your bike’s handlebars, keeping them from “self adjusting” while your riding This is often referred as a “face plate”. Kogel’s bike stem bolts are 18mm long and made from titanium. They also come in a variety of anodized color options.

What are bicycle bolts made of?

Bicycle Stem Bolts are made of Steel alloy, which is high strength, lightweight, wear-resistant, corrosion-resistant and durable.

How do you tighten bike bolts?

Quote from video: When tightening them up if I use the allen key to its whole length.

Are all bike screws metric?

On one bicycle, you will see both the metric and SAE system. Most threading is metric, but not all. Axles on most bikes will use a 9mm threading for the front axle, and 10mm for the rear axle. Bottom brackets are commonly 1.375 inch with thread pitch of 24 threads per inch.
Aug 17, 2010

What threads are used on bicycles?

Bicycle Industry Threads

Nominal Thread Size Example of Bicycle Uses
10mm x 26 tpi Rear axle, quick-release, Campganolo®
12mm x 1mm Some spline crankset bolts
1/2 inch x 20 tpi Pedal threads, one-piece cranks
9/16 inch x 20 tpi Pedal threads- common three piece cranks

Does a shorter stem affect handling?

Stem length affects handling



A shorter stem will result in snappier steering, a longer stem will produce slower steering. Adjusting the stem length can be used to tailor the handling. That’s generally why cyclocross races use a shorter stem, and long distance road cyclists opt for a longer stem.
Nov 21, 2017

How does a longer stem affect bike handling?

Stem length is one of a number of factors, along with head tube angle and fork rake, that affects a bike’s handling. Generally speaking, a shorter stem will result in faster handling, while a longer stem will result in slower, more predictable handling.
Feb 27, 2022

What size are stem bolts on BMX?

This Odyssey “V1” BMX Stem Bolts consists of six massive 6 mm hex screws which have a head diameter of 12.8mm and a length of about 30mm. This Odyssey “V1” BMX Stem Bolts fits perfect on your Odyssey Stem but is also suitable for many other stems.

What size is a derailleur bolt?

Derailleur Hanger Bolt – 6mm.

How are bicycle bolts measured?

The bolt length is measured from the end of the threads to the bottom of the bolt head. That’s the length of the shaft, excluding the head. In the example it is 16mm long. The thread pitch is the distance between threads measured in millimeters along the length of the bolt.

What is a stem bolt?

Stem bolts were a type of bolt used to fasten objects that was invented prior to 2153. In 2153, a group of Osaarians in the Delphic Expanse had appropriated a large number of stem bolts, which they stored in a sphere. (

Do mountain bikes use metric or standard?

The bike industry is metric. For home use, a full set of metric allen wrenches is great. For bringing with you, there are a lot of multi-tools that will fit in your pocket and provide all the help you need on the road.
Jul 10, 2010

Do mountain bikes use metric?

Mountain bikes (frame sizes, at least) are measured in inches — road bike frames are usually measured in centimeters. I guess it’s because roadies have more of a presence in Europe, which is also where racing really originated. Bolts and fasteners — you’d be hard-pressed to find a non-metric size.
Mar 12, 2012

Are MTB metric or imperial?

Quote from video: People also ask

What size is a derailleur bolt?

Derailleur Hanger Bolt – 6mm.

How are bicycle bolts measured?

The bolt length is measured from the end of the threads to the bottom of the bolt head. That’s the length of the shaft, excluding the head. In the example it is 16mm long. The thread pitch is the distance between threads measured in millimeters along the length of the bolt.

What size is an M5 screw?

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

What size is a bottle cage bolt?

The holes are usually sized and threaded to accept an M5 x 0.8 bolt, which means 5 mm in diameter and threads 0.8 mm apart (pitch).

What size are bicycle water bottle screws?

SIZE. The size of this stainless steel water bottle cage bolts is M5x12. A Pack of 10 pieces for bike water bottles to give you long lasting perfect cycling experience.

What size is a standard bike water bottle?

between 21-26 ounces

Depending on how long you’ll be riding for, you probably want a bottle with between 21-26 ounces of capacity. Most athletic-oriented cycling water bottles fall into this range, and are easy to fit into standard water bottle cages.