What is seat tube length on bike?
2 min read
Asked by: Brandon Hare
Seat tube length is the straight line distance between the centre of the bottom bracket and the top of the seat tube.
What seat tube length do I need?
Touring Bike
| Touring Bike | ||
|---|---|---|
| Frame Size | 38cm | 56cm |
| Suggested Rider Height | 4’11”-5’2″ | 5’9″-6’1″ |
| Top-Tube Length, Horizontal | 518.9mm | 566.8mm |
| Seat-Tube Length, B-B Center to mid top tube | 320mm | 500mm |
How do you measure a bike tube seat?
Seat tube length is measured from either the centre of the bottom bracket to where the top tube and seat tube meet (Centre-Centre or C-C) or to the top of the seat tube (Centre-Top or C-T).
How does seat tube length affect handling?
While the seat tube length doesn’t directly affect the handling of the bike, important measurements for handling and fit, such as reach, must be compared to the seat tube length to define how long the bike is relative to the height of the rider.
How do I measure my top tube length?
The effective top tube length is the horizontal distance from the top tube/head tube junction to the seat tube. This measurement has become significant as more and more bikes are designed with sloping top tubes.
How do I choose seatpost length?
Length. Make sure you have the correct length of seatpost for your needs. Seatposts are available in several lengths from 280mm to 400mm so measure the amount of post you have showing (plus the minimum amount of insertion that needs to be in the seat tube) before purchase. If in doubt, measure your old post.
Does seat tube height matter?
It doesn’t actually make a difference. Some people say it’s easier to get your feet over a low stand over frame, which kind of makes sense, but the difference between low and high is only an inch or so. How high you have your seat makes more of a difference.
What is virtual top tube length?
With a sloping top tube, the “actual” top tube length is shorter than the “effective” or “virtual” top tube length, which is the length the top tube would be if it were parallel to the ground. So, you need to focus on the “effective” or “virtual” top tube length when you are looking at a sloping geometry frame.
