1. The most important thing about buying a new bike is to make sure it fits. The only way you'll know if the bike is right for you is to size up the bike and make sure that the bike's geometry matches your body's geometry. Ask questions and do some research.
mtn. biking 101
2. If possible, try to find a shop that will let you demo the bike on real dirt. Five minutes in a parking lot won't cut it. You wouldn't buy a car without a real world test drive, and a bike should be no different.
3. Don't belive the hype. Just because your favorite rider or best friend rides a certain bike, that doesn't mean that's the best one for you. Have an open mind and be realistic about your needs and ability.
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  1. #1
    mtbr member
    Reputation: ThisIsMyName's Avatar
    Join Date
    Jul 2006

    Theoretical Top Tube v. Top Tube Length?

    I've been looking at the Norco Fluid 1 as a possible second bike, and first full suspension bike. I've been comparing the geometry to the hardtail I already have. However, on Norco's website, they have "theoretical top tube length" and "top tube length" measurements listed. I don't know what the difference between the two measurements is? Isn't the top tube length of a bike the top length of a bike? If it's 23 inches isn't 23 inches? The difference between the two measurements is substantial. The difference is almost an inch.


  2. #2
    Domestic Fowl
    Reputation: FreeRangeChicken's Avatar
    Join Date
    Jan 2004
    It is the measurement of an imaginary top tube parallel with the ground, not sloped, and measured from the center of the head tube to the center of the seat tube(or seat post). Bikes with a sloped top tube often give a "theortical" or "effective" TT length in their specs. This allows you to compare apples to apples with other bikes.

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