trek 4300 seatpost size

Reports of the demise of this Web site are greatly exaggerated! We at sheldonbrown.com thank Harris Cyclery for its support over the years. Harris Cyclery has closed, but we keep going. Keep visiting the site for new and updated articles, and news about possible new affilations.

This page describes how to measure bicycle seat tubes and seatposts, and lists various bicycles, and the seatpost diameters that fit them.

Sheldon brown started compiling a list, and realizing that it was too large a project for one person, he solicited information from readers. john allen and harriet fell have received more reader-provided information but we will no longer update this file, except to correct errors. we recommend measuring, both because it is more reliable and because we can't possibly have information on every make and model of bicycle. so this article also describes how to take measurements, even if you don't have the "right" tools..

The size is usually stamped on the seatpost near the bottom. It will be near the minimum-insertion mark, not visible when the seatpost is installed on a bicycle.

On a related topic, we have an article (by Sheldon Brown, updated by John Allen) on Stuck Seatposts which may be of use to you.

National and Historical Trends

Most steel bicycle frames have tubing of standard outside diameter. Frames made to British or Italian standards will typically have 1 1/8" (28.6 mm) seat tubes . Older French bicycles used 28 mm. Old American style, commonly used on BMX bicycles and other bicycles that use one-piece-cranks , uses a 1" seat tube. Standard outside diameter accommodates standard lugs and clamp-on parts such as front derailers, pulleys and other cable guides, pump pegs, etc.

High-performance bicycles are made of thinner-walled tubing, so the hole will be larger if the outside diameter is kept the same.

As a result, a larger seatpost size is often a sign of a higher-quality bicycle. This has resulted in a de facto standard of 27.2mm for high-quality bicycles that have 1 1/8" O.D. seat tubes. Since high-quality seatposts are widely available in 27.2, most high-end aluminum and carbon-fiber road bicycles also use 27.2.

A recent trend to oversized tubing has resulted in the introduction of oversized seatposts (anything over 27.4 would be considered oversized.) These are more commonly seen on mountain bikes, where the longer seatposts can use the extra strength. Common diameters arey 30.9mm and 31.6mm.

Diameter is not the only factor affecting compatibility. Using a carbon-fiber seatpost in a metal frame, or vice versa, invites problems. Metal should be greased, but carbon fiber should not be. The seatpost clamps of metal frames easily damage carbon-fiber seatposts.

Most of the size information on the list below was provided by people like you. We have no way to check the accuracy of the data. It should be noted that frames can be reamed out to take a larger-sized seatpost, and sometimes a replacement seatpost may be a slightly different size than the original.

Measuring is better than guessing. Most better bicycle shops will have a set of seatpost-sizing rods like this:

Alternately, you could check the diameter of a seatpost that fits. The diameter is stamped on many seatposts (usually on the part that is fits inside the bicycle's seat tube and gets scratched up and covered with grease, *sigh*). You also could measure the diameter of the seatpost and of the hole in the seat tube using a dial indicator or vernier caliper.

Dial indicator caliper

Vernier caliper

You don't even need a caliper to compare seatposts. A large adjustable wrench, set to just slip over a seatpost, is fine that purpose. -- see our article about trick measurement techniques .

Sheldon collected seatpost-size dimensions to place in the table below. I (John Allen) rpeat: I have dropped this task, for two reasons: it is tiresome, and measuring is far more reliable. As the saying goes, a comparison is better than a measurement. But also, a measurement is better than looking up a measurement of a different seatpost or seat tube. There is no guaranteee that it will be correct just because the bicycle make and model match those in the table. Compare, or measure!

That said, here are links to the measuurements we have.

Continued at https://www.sheldonbrown.com/seatpost-sizes-m-z.html...

Sheldon was previously listing people who had contributed data points to this list, but doing so more than doubles the time it takes to enter data, so he stopped doing it, and we hope everybody will forgive us for discontinuing this..

• What's New
• Sheldon Brown on Facebook
• Site Feedback & Questions

Articles by Sheldon Brown and Others

• Bicycle Glossary
• Cyclecomputers
• Do-It-Yourself
• Essays and Fiction
• Family Cycling
• Gears and Drivetrains
• Repair Tips
• Singlespeed
• Translations
• Sheldon - the man

Copyright © 1996, 2008 Sheldon Brown

Harris cyclery home page.

• Crosscountry
• Rider Notes

2014 Trek 4300

A 26″ aluminum frame crosscountry bike with modest components.

For This Bike

View more similar bikes →

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Similar Bikes

(descending)

Add custom gearing

Last updated June 29 Not listed for 2,550 days

• Rocky Mountain
• Specialized
• YT Industries
• Allied Cycle Works
• Black Market
• DALLINGRIDGE
• Diamondback
• Early Rider
• EVO Bicycles
• Growler Bikes
• Guerrilla Gravity
• iGO Electric
• Intense 951
• Juiced Bikes
• View all brands
• Production Privee
• Rad Power Bikes
• Rambo Bikes
• Riese & Müller
• Soul Fast E Bikes
• Spark Cycleworks
• State Bicycle Co.
• Structure Cycleworks
• Surface 604
• Van Nicholas
• Vintage Electric
• We Are One Composites

• Cross Country

• All Mountain

• AUS $ NZD $ USD $ CAD $ GBP £ EUR €

Size / 13", 16", 18", 19.5", 21", 22.5"

At a glance

Where to buy.

Specifications

• Frame Alpha SL Aluminum
• Wheels Alloy front, Shimano RM60 rear hub; Bontrager Camino rims
• Wheel Size 26"
• Tires Bontrager Connection Trail, 26x2.0"
• Crank SR XCC-150 42/34/24
• Front Derailleur Shimano C050
• Rear Derailleur Shimano Alivio
• Shifters Shimano EF50
• Brakeset Tektro V w/ Shimano EF50 levers
• Handlebar Bontrager Crowbar Sport, 25mm rise
• Saddle Bontrager Select Basic
• Seatpost Bontrager Sport
• Stem Bontrager Sport, 25 degree
• Headset Aheadset Slimstak w/semi-cartridge bearings, sealed

Q: Where to buy a 2006 Trek 4300?

The 2006 Trek 4300 may be purchased directly from Trek .

Q: What size wheels does the 2006 Trek 4300 have?

The 2006 Trek 4300 has 26" wheels.

Q: What size 2006 Trek 4300 should I get?

No comments on this bike yet. Why not be the first?

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Want more MTB in your mailbox?

The latest on mountain bikes delivered straight to your mailbox.

More Bikes in Range View All

Trek 4300 Disc

More cross country bikes view all.

Santa Cruz BLUR GX AXS RSV / Carbon C

Rocky Mountain Fusion 10

A perfect blend of efficiency and reliability, the Fusion has everything you need to get from A to B.  Designed for speed and efficiency, the fast-rolling 29” wheels and responsive handling will…

Norco Mountaineer

Deals view all, view all deals, recent posts view all.

Blackburn Honest Digital Pressure Gauge Review

It's 2020 people. The squeeze and bounce test doesn't cut it anymore (and this is…

Comparing Mountain Bikes

Mountain Bikes are complicated machines. They have parts from hundreds of different manufacturers, come in…

Undomestic Mountain Bikes: Here’s what we know

Update March 2020: Undomestic has announced that they are manufacturing frames "at this moment" and…

Send Feedback

Have a suggestion? Looking for a bike that's not on MTB Database? Or perhaps you've spotted an error?

We'd love to hear from you. Let us know with the form below.

This website uses cookies to ensure you get the best experience possible. Learn more.

About MTB Database

Explore, search and compare thousands of the world’s best mountain bikes here on Mountain Bike Database.

Compare prices, components, suspension, reviews, images and more on current and past MTB’s. You can even share reviews, comments and questions on mountain bikes. View and compare a huge selection of bikes from brands such as Trek , Specialized , Giant , Santa Cruz , Norco and more .

We strive to provide accurate and up-to-date information for mountain bikes on MTB Database. If you’ve spotted any issues, please let us know . We also include helpful tools, such as our frame size calculator, to assist you in choosing the right mountain bike. Bear in mind that these tools serve as a guide and simply provide a general indication. Refer to information provided by your bike manufacturer for the most applicable information for your bike.

Bikes By Brand

Bikes by year, bikes by riding style, bikes by wheel size, popular bikes.

• 2022 Specialized Epic EVO Comp
• 2022 Trek Marlin 6
• 2022 Specialized Enduro Comp
• 2022 Specialized S-Works Epic EVO
• 2022 Specialized Epic EVO Expert
• 2022 Giant Fathom 29 1
• 2022 Trek Marlin 7

Latest Bikes

• 2023 Commencal SUPREME DH V5 SIGNATURE 70'S
• 2023 Orange Phase 29 Factory
• 2022 Commencal META SX V4 TEAM Frame
• 2023 Commencal SUPREME DH V5 SIGNATURE LTD
• 2023 Commencal META SX V4 - Frame
• 2023 Riese & Müller Swing4 vario
• 2023 Riese & Müller Swing4 silent

Trek 4300 Mountain Bike Review: Is it worth it?

Looking for a reliable and affordable mountain bike that can handle rugged terrain? The Trek 4300 might just be the bike for you. 

As a mountain bike, Trek 4300 is built to take on any adventure. Thanks to a durable aluminum frame, wide range of gears, and powerful brakes. 

In this article, we’ll take a closer look at the Trek 4300 mountain bike, its features, and what makes it stand out from the competition. 

Read on to find out if the Trek 4300 is the right mountain bike for you.

Trek 4300 Mountain Bike At A Glance 

Trek 4300 is a hardtail mountain bike with a lightweight and sturdy Alpha aluminum frame, which makes it easy to handle. While the Marlin 5 is made for trail riding, it’s also versatile and can double as a commuter bike. 

The Shimano drivetrain and powerful disc brakes offer great versatility on all types of terrain. While the front suspension provides excellent balance and stability on rougher roads or trails, ensuring smooth rides. 

It also comes with double-walled rims and puncture-resistant 26×2.0″ tires, making it a reliable choice for trail riding. 

Trek 4300 is the perfect combination of affordability and quality, which is a great choice for beginner riders looking to hit the trails.

• Sturdy and lightweight aluminum frame
• Responsive brakes and smooth shifting
• Comfortable riding position
• Adjustable saddle and handlebars
• Complex 3X drivetrain
• Small 26-inch wheels

Unfortunately, this bike has been discontinued, but Trek has impressive newer models with better designs which are excellent alternatives to the 4300 Trek mountain bike. 

We recommend Trek Marlin 5 and Schwinn Traxion as great alternatives, you can scroll down to see our brief review of these bikes. 

Trek 4300 Mountain Bike Features

Frame and fork.

First things first, the frame is a crucial component of any bike. In the case of the Trek 4300, it’s made of aluminum, which is a popular choice due to its durability, affordability, and lightweight. 

In fact, the original 4300 model used Trek’s Alpha Aluminum frame that’s tough enough to handle rugged trails with ease. As the model progressed, Trek introduced the Alpha Gold Aluminum material for the frame of the later versions of the 4300. 

This updated version has a more aggressive race geometry for speed, with internal cable routing for durability, and rack mounts for versatility.

You’ll also find that it has a replaceable derailleur hanger. Now, these upgrades made the bike more versatile and allowed it to handle a wider range of terrain.

Moving on to the fork, the Trek 4300 is a classic hardtail mountain bike with a front fork. This means that the front wheel is equipped with a suspension system that can absorb shocks and vibrations, making for a smoother ride on moderate terrain. 

The suspension fork has 70-100 mm travel, depending on the specific model, and it’s designed to handle mountain trails. However, it’s important to note that the suspension fork isn’t long enough to handle descents on rough trails. 

So while it can certainly absorb some bumps, it’s not enough for really difficult trails or downhill riding. But don’t worry, this bike can still take a lot of abuse. After all, it’s a mountain bike, and it’s designed to handle dirt trails.

Gears and Brakes

Gears and brakes are some of the most important components of a mountain bike, especially if you plan on hitting tough trails or climbing hills. 

Let’s take a closer look at the gear and brake systems on the Trek 4300 mountain bike.

In the first few generations of the Trek 4300, you could find a 3x8spd drivetrain with 24 gears.

But if you’re looking for something a bit more efficient, the later models of the Trek 4300 were fitted with the Shimano Acera M390 9-speed drivetrain. This gives you a wider range of gears for better control on hard trails.

Now, let’s talk about brakes. If you carefully look through all the different versions of the Trek 4300, you’ll find that some of them had rim brakes and some others had disc brakes. 

The older models were fitted with rim brakes, while the later models featured the Shimano M395 hydraulic disc brakes, which gives a much better braking power at a great price. 

Wheels and Tires

Most mountain bikes we see now have 29-inch wheels, but the Trek 4300 had 26-inch wheels and 26×2.20 tires, which actually are very agile and will quickly pick up speed. 

In later models, these tires were improved to be puncture resistant and could withstand increased tire pressure. 

We consider bigger wheels to be better for mountain riding, but small wheels aren’t that bad either because they are more agile, tend to accelerate faster and will easily move around tight corners. And these features are great for technical riding. 

But the bigger 27.5 and 29″ wheels actually provide more stability and comfort, which is why they are now preferred for mountain biking.

Despite the small wheels, the double-walled rims and 32-spoke design of the Trek 4300 are pretty solid and tough enough to withstand years of abuse on the trails.

At the end of the day, the wheels and tires on the Trek 4300 are a great combination for riders who want to tackle technical terrain and need a bike that can handle quick acceleration and tight cornering. 

While the market may be shifting towards larger wheels, the Trek 4300 is still a great option for those who value nimble handling and puncture resistance.

Saddle and Handlebars

The saddle is an important component of any bike, especially when it comes to mountain biking. 

While the standard saddle on the Trek 4300 may not be the most comfortable, the 31.6mm seatpost offers plenty of adjustment for a customized fit. 

You can even upgrade the saddle to one that suits your preferences for maximum comfort.

The handlebars of the Trek 4300 are a different story, though. Made from durable alloy, these handlebars are built to withstand the rigors of off-road riding. 

With a 31.8mm diameter and 15mm rise, the handlebars provide a comfortable and stable grip while you ride.

The stem of the Trek 4300 is also designed for both comfort and control. With a 31.8mm clamp diameter and a 10-degree rise, the stem ensures a comfortable riding position while keeping you in control of the bike. 

When you combine the Bontrager Riser handlebar and the Bontrager Approved stem on the Trek 4300, you get a comfortable and stable ride. 

Size and weight

When it comes to finding the right fit, the Trek 4300 Mountain Bike has got you covered. With a wide range of frame sizes available, from 13″ to 22.5″, you’re sure to find the perfect fit for your body type. 

Actually, you may find sizes ranging from 13, 16, 18, 19.5, 21.5, 23.5″. But since these bikes have been discontinued by Trek, finding them in the exact size you want may be a challenge.

One thing to keep in mind is that the bike weighs around 28.2lbs (12.8 kg), which might not make it the lightest bike on the market. I believe this is due to the front fork, which adds weight but also adds extra shock absorption for a more comfortable ride. 

However, this bike is sturdy enough to support riders up to 265 lbs of body weight.

Ride quality and performance

The Trek 4300 Mountain Bike offers fun and confident rides on the trails, whether you’re hitting the trails or cruising around town. 

While it’s considered an entry-level mountain bike, don’t let that fool you. It’s a reliable bike that can be used for commuting, leisurely rides, or for hitting some challenging trails.

The comfortable riding position and triple chainring setup make it easy to tackle steep hills and rough terrain. Plus, the high-quality suspension system keeps things smooth and comfortable, no matter what kind of surface you’re riding on.

Trek 4300 has durable components that are built to last, so you don’t have to worry about things breaking down quickly. 

The responsive brakes and smooth-shifting gears give you complete control and make riding this bike a breeze. And, even in wet or muddy conditions, the disc brakes offer reliable stopping power.

One of the best things about the Trek 4300 is its versatility. While it’s certainly a capable mountain bike, it’s also a great choice for commuting or everyday riding. 

Best Trek 4300 Alternatives

As Trek 4300 mountain bikes are now discontinued, you cannot buy them brand new. However, Trek has a range of trail bikes that offer superior build quality and performance. 

These models are more advanced and come at a higher price point than the budget options available from brands like Schwinn and Mongoose, but the investment is worth it as the quality is unmatched.

In my opinion, the Trek Marlin 5 and Schwinn Traxion are great alternatives for the Trek 4300 mountain bike.

Trek Marlin 5

Trek Marlin 5 is a trail mountain bike that’s built to gracefully handle daily adventures on rough terrains. It has a lightweight aluminum frame with a 2×8 drivetrain for smooth riding and shifting and powerful hydraulic disc brakes which provide fast and precise stopping. 

While the Marlin 5 is made for trail riding, it’s also versatile and can double as a commuter bike. This bike has a stunning frame with internal routing for the brake and shift cables, which can extend the lifespan of your wires by shielding them from the environment.

It’s the perfect bike for new trail riders and comes in seven frame sizes to fit riders of all heights. Marlin 5 is elegant and comfortable, with a ton of features that are typically reserved for more pricey bikes.

Schwinn Traxion

The Traxion MTB is equipped with a remarkably solid aluminum full-suspension frame that easily picks up speed and maintains it very well.

This bike provides comfortable rides and handles bumps well, regardless of where your trail adventures take you. Thanks to the wide knobby tires, sturdy double-walled aluminum rims, and a superb trail-taming Schwinn suspension fork. 

The 24 speed shifters also ensure fluid gear shifting, which makes for a fun and pleasant riding experience. In addition to that, the mechanical disc brakes lock into place instantly when applied, and this ensures precise and efficient stopping. 

The wheels have all-terrain tires and alloy rims for strength and low weight. Plus, you can easily adjust the height of the saddle using the quick release seat post to get your best fit. 

Related Post: Schwinn Traxion Mountain Bike Review

Finally, is Trek 4300 MTB a good buy?

The Trek 4300 mountain bike is a reliable and versatile bike that can handle a variety of terrains and riding styles. 

With its durable aluminum frame, wide range of gears, and powerful brakes, this bike is a great choice for both beginners and experienced riders. 

Trek 4300 offers a solid balance of performance and affordability. And if you’re looking for a reliable and budget-friendly mountain bike, the Trek 4300 is definitely worth considering.

You likely won’t find a brand-new Trek 4300, but the alternative options we included above are great choices too.

You may also like:

• Best Budget Mountain Bikes Under $400
• Best Budget Mountain Bikes Under $300
• Best Mountain Bikes for $1500 and below

Dial up your biking experience.

BikeCrunch’s content is for informational and educational purposes only.

As an Amazon Associate, we earn from qualifying purchases. However, this does not impact our reviews and comparisons. We try our best to keep things fair and balanced, in order to help you make the best choice for you.

© BikeCrunch

• Forum Listing
• Marketplace
• Advanced Search
• MTBR Discussion Forums
• What Bike to Buy

2009 Trek 4300 detailed size information.

• Add to quote

Hello, I have been searching online for some time trying to find information on my bike frame. I need size information for things like the bottom bracket, what size seat post it supports etc. Is there any easy location to find this? Trek wasn't helpful and provided me with this TrekBikes.com Bike Archive | 2009 4300 Thanks  

Your answer lies in this page I had open in another tab: 8" Digital Caliper Even if there were a common resource of sizes I'm not sure that I would trust it when I'm putting my money out there trying to buy the right parts. Things like seatposts are usually engraved with their size down below the min insert line and bottom bracket shells come in two sizes, 68 and 73mm so you should be able to get that with a ruler. But if you find that you need to measure lots of things, having a pair of calipers around is a great idea. Or you could take your bike to your LBS and have them help you.  

• ?            
• 15.5M posts
• 519.4K members

Top Contributors this Month