Frame Sizing: Stack and Reach vs. Seat and Top Tube Length
This post aims to determine whether it's better to use the stack and reach values rather than the seat and the effective top tube lengths as a way to size…
Should I Use The Effective Top Tube Or The Reach When Sizing a New Bike? (easy answer)
Condensed Answer: The reach and the effective top tube should be both taken into consideration when sizing a new bike. Special attention should be paid to the reach as it…
Too Long vs. Too Short Effective Top Tube (Advantages & Disadvantages)
Objective: The purpose of this post is to explain whether it is better to have an effective top tube that's too long than needed or too short. First, it's necessary…
Effective vs. Actual Top Tube (What’s the difference?)
This post explains the difference between the effective top tube and the actual top tube. Definitions Actual Top Tube. The actual top tube is essentially the length of the top…
Reach vs. Effective Top Tube (What’s the difference?)
This post compares and explains the differences between the terms reach and effective top tube. Definitions Reach - the horizontal distance from the center of the bottom bracket to the…
What Is The Seat Tube Angle Of Dirt Jump Bikes and Why?
Condensed Answer: The average seat tube angle of a dirt jumper is 71.3º This post examines the seat tube angle of dirt jump bikes. If you are not familiar with…
Is a 75 Degree Seat Tube Angle Too Steep? (ultra-fast answer)
Ultra-fast answer: A 75° seat tube angle is too steep for a road, gravel, downhill, or a touring bike, but it can work just fine for an XC or a…
What Is The Ideal Seat Tube Angle For a Gravel Bike (ultra-fast answer)
Ultra-fast answer: Gravel bikes have a very conservative seat tube angle of about 73.5° because they have to be versatile "climbers" and "descenders". Therefore, extreme geometrical choices are not an…
Why Do Downhill and Freeride Bikes Have Super Slack Seat Tube Angles? (fast answer)
Ultra-fast Answer: Downhill bikes have slacker seat tube angles to preserve their slack head tube angles and short reach all while protecting the rider from flipping over the handlebars by…
The Seat Tube Angle’s Effect On a BMX Frame
This post examines the seat tube angle's effect on a BMX frame. Seat tube angle The seat tube angle (STA) is formed by a horizontal line passing through the middle…