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.
Results 1 to 6 of 6
  1. #1
    mtbr member
    Join Date
    Nov 2014

    Bonking ... not feelin' well 26" tyre & on 27.5 frame, any effect?

    Hi guys,

    Stupidity of me, ordered a Hardtail 2014 Giant XTC 27.5 frame and to fit a 26" tyre & fork. Now I learned my lesson. Any effect of riding?

    I am still searching the model for bottom bracket before the frame arrive. I checked on web, it is a pressfit which has extended 86mm or something. I cant get more info on the bottom bracket dimension and the length except for FS (they got drawings).

    Need help guys.

  2. #2
    mtbr member
    Join Date
    Jan 2004
    Sell the wheels and fork and get the correct sizes. Using 26" wheels will result in a low BB height. The geometry is based on 27.5" wheels.

  3. #3
    mtbr member
    Reputation: ARandomBiker's Avatar
    Join Date
    Aug 2014
    The frame was designed for a wheel with a larger radius. The big get effect will be the bottom bracket being closer to the ground by the same distrance as the decrease in wheel radius which is not a huge amount. Pedals will hit more stuff if you're not careful.

    I can't help with the bb size. That sh!t's a black art as far as I'm concorned. I'll take a good old 68/73 English threaded shell, thank you.

  4. #4
    mtbr member
    Join Date
    Oct 2014
    at least put a 27.5 on the front. it'll roll over rocks better, but you'll still have the torque of the 26" in the back.

  5. #5
    mtbr member
    Reputation: Wisconsinite762's Avatar
    Join Date
    May 2014
    It would be best to use 27.5 inch wheels and fork, that is what the bike is designed for. If you already have the 26 inch wheels and fork I would sell them and get 27.5 inch versions.

    Using 26 inch components on a 27.5 frame will cause the BB height to be lower and possible the HA to be slightly steeper.

    For your question on the bottom bracket I recommend checking with the Giant sub-forum on this site if you haven't already.
    2013 Trek Marlin

  6. #6
    mtbr member
    Join Date
    Jun 2008
    I'd agree with the above - correct wheel size is always the best option, but if you're short on cash and have some 2.4"+ tires that would probably get you by till you could save the cash for a new fork/wheelset. Happy riding!

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