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  1. Reply

    Mountain Bike Frame Question? Is this a good size for a 26 year old male that is 5’9″ tall?

    28.7″ H x 7.6″ W x 53.5″ D
    it is 18″ frame height, sorry
    it is 18″ frame height, sorry

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    1. Reply

      The only true way to tell for sure is TRY B4 you BUY. You should be able to comfortably stand over the bike flat footed with about 2″ of clearance on a mountain bike. All indications from sizing charts do indicate that this is the correct size though. Bike frames are NOT universal in size. They vary slightly from one company to the next in stand-over height.

      From your first set of specs, sounds as if you are ordering via the Internet from a discount store. Bad choice.

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    • Spec
    • February 6, 2014

    Mountain Bike Disc Brakes? Can I put disc brakes on my Tribal mountain bike?

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      Your frame has to be set up for disk brakes to do it if not there are adapters that you can buy to do this.

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  2. Reply

    Need Help In Mountain Bike Geometry? What does a slack and tight head tube means?
    and roughly what are their angle?

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    1. Reply

      Sfr1224 is correct. Head angle is an important part of frame geometry that you’re more likely to feel when you ride. It’s only one aspect of frame design, but it’s a biggie.

      Slack head angles do more than slow the steering response, though…..they also have the effect of slightly shifting the rider’s weight rearward, further behind the front axle. This, combined with the typically longer fork travel that accompanies slack frame geometry, helps with rider balance and impact absorption when your bike is pointed downhill. Another effect it has is to lengthen the wheelbase, which provides some stability at speed and in cornering.

      The steeper the terrain that the bike is meant to handle, the more slack the head angle. You can feel two degrees of difference if you know what you’re looking for. Serious downhill bikes may have heads as slack as 64?. Light freeride and 5″-6″ trailbikes will hover around 66?-69?, and xc/race frames will stick to the more traditional 70?-71?. Road bikes, in comparison, are usually 71?-74?.

      Steep head angles are really responsive, and there are some dirt jump and trials bikes with a steep head that are really nice to maneuver. They make riding through tight, twisty trails a little easier, but if you’re in rough terrain or steep terrain, they make it a tad easier to wash out the front wheel in a corner or to go over the bars when you get surprised by obstacles (however, slack head angles won’t cure endo-sickness….fair warning. LOL) :o)

      In contrast, if you put a slack head angle bike on flat ground, the steering will feel sorta dead, and if you turn the bars hard, there’s a “breakover” point where the wheel meets resistance and then snaps past it….kinda sucks until you get used to it. As an example, a couple years ago I bought a freeride hardtail frame….very burly, and I wanted to set it up for urban drops, etc. I was used to xc frames with 70?ish heads, and this was a 67? bike designed around a 130mm fork (5″). It felt bad to me, and wasn’t what I wanted for riding the ledges on square planter boxes, quick maneuvers on stairs and tight cornering…..or for trackstands, pivots, etc. So, I put a 100mm fork on the bike which had the effect of steepening the head angle by about 1?. Changed a couple other aspects on the stem/handlebars, too, but it improved the handling for my purposes. You don’t want to vary a whole lot from what the manufacturer designed (and putting longer forks on bikes designed for shorter ones is generally a bad idea for safety/durability)…..but there’s a little room to play.

      There is a lot more to frame geometry and what-affects-what, how the bike feels and handles, etc. Chainstay length, seat tube angle, and bottom bracket drop (height) are all important numbers to pay attention to if you want a particular type of frame/handling. It gets a little complex, but manufacturers have tweaked geometry into different variations that work very nicely for their applications. It’s funny, though……in a couple hundred years or whatever, the initial design of the bike frame hasn’t changed very much at all. Whoever came up with it was either lucky or pretty intelligent! :o)

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    • Lucy
    • February 11, 2014

    What Mountain Bike Frame Size Would You Recommend? I’ve had lots of different advice from shop assistants & from online charts & guides. I can’t seem to get a straight answer. I’ve been recommended 16″ all the way up to 20″. What dual/full suspension mtb frame size do you think would suit a person with the following measurements?

    Height; 5′ 7″
    Inseam; 32″

    Thanks for your help!

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    1. Reply

      For most mountain bikes you want a frame that is 59% of you inseam and allows 2-4 inches of clearance when you stand over it. 32 X .59 = 18.88 inches If the frame is too small the cockpit will feel cramped and the handle bars will be a lot lower then the saddle. Too large and you will have to lean too far forward to reach the handlebars. A women’s specific bike will have a shorter top tube then the men’s version. Have the bike shop set up bike for you to try, the fore and aft position of the saddle can make a big difference in the reach to the bars.

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  3. Reply

    Looking For A 150mm Rear Spacing Frame? What are a few good bike frames with 150mm of rear hub spacing?
    I’m looking for a all mountain – downhill double suspension frame.

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    1. Reply

      Why are you set on a 150mm hub? Typically, you want to base your hub search around the frame specs that best suits your riding styles, not vice versa.

      That said, the Santa Cruz Bullit is a 150mm hub and would be a great all mountain ride. If you dont like single pivot bikes, the VP-Free is a similar type of all mountain/freeride frame with the VPP suspension and a 150mm rear end. The Intense SOCOM is another similar bike, but with a bit more travel, that delivers 150mm. Some of the Commencals and Rocky Mountain bikes use 150mm, Foes are 150mm, some of the beefier Kona’s are 150… As a general rule, if the bb width is 73mm or higher, its likely to be a 150mm for chainline purposes. A 63mm bb is more likely a 135 hub.

      Also, just so you know… a downhill bike and an all-mountain bike are two very different things. A DH bike is gonna be single ring, long travel, slack geometry… an all-mountain bike is really just like a long travel xc rig with two or three rings and a much more snappy geometry for slow speed handling.

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    • Kyla
    • February 16, 2014

    What Size Bike Frame Do I Need? I have about a 30″ inseam, and am 5’2″, what size frame should i get, and is there anything else i need to know about my bike size?
    Im looking for a hybrid.

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    1. Reply

      Go to the local bike shop and get fitted. Frames vary between manufacturers so there is no set size.

      30 x .59 = 17.7 inches for a mountain bike 2-4 inches of clearance standing over the frame.

      30 x .65 = 19.5 inches for a road bike 1-2 inches of clearance standing over the frame.

      For a hybrid it will be the same as a road bike. Look at the stand over height and get a frame that is 1-2 inches less then your actual inseam with shoes on.

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  4. Reply

    Mountain Bicycles Tires? I have a Felt NINE elite 2008 the frame fits me fine but the height is a bit too big since it has 29″ wheels. Would it be a bad idea to mount a set of hybrid tires to the original rims on this type of bike? That would make the bike’s top tube over inch shorter which would be where I need it. This bike is considered a medium level mountain bike. I will be loosing the aggressive knobby tires and the new ones would be quite a bit narrow.
    The frame is 17.5″ which is rather small and fits me right. I do have clearance but I want just little more so I can maneuver the bike better,

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    1. Reply

      Lowering the bikes standover by changing the tires wont help much. It sounds like your frame is just to big.

      well if the bike fits, it may just take a while to get used too. you have to steer 29ers a bit more and getting used to the new height can take awhile, but it will come eventually. putting on semi-slicks will just creat even more problems. the bike will only be a few centimeters shorter and you will have made it even squirlier. If you are going to change it you could try putting some Cyclocross tires on… or if you have disks ans a pair of 26” wheels you could just put them on… or one in the back at least.

      but If you say It fits I would just get used to the new height or get a new bike.

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  5. Reply

    What Size Mountain Bike Frame Do I Need? Im about 5′ 10.5″, but have longer legs compared to the average person (but not massive!) Looking at buying a downhill mountain bike but not sure what size frame to get?

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    1. Reply

      Not sure about the longer legs, but assume that you probably want a medium frame – 18 or 19″.

      How to size your frame. Stand over your mountain bike with your feet about a foot apart. The frame should be about 2″ – 4″ clear of your family jewels. If the frame is too big you will bash your nads on the top bar.

      Extend your saddle so that, with your heal on the peddle your leg is fully extended. This means that when riding on the balls of your feet your leg will be slightly bent. If your saddle is right down on its lowest point, or only two or three inches above, your frame is too big. You want the seat post to have about a foot in height so that it adds to the bike suspension by flexing. If, however, your leg is slightly bent and the seat post is beyond the safety markings on the tube, the frame is too small and you should look at the next size up.

      Finally, lean over and grab the bars. If you feel too stretched and uncomfortable, then the bike style is probably wrong for you. Different manufacturers have different geometry. Try out a few until you find a comfortable set up.


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  6. Reply

    I Am Riding A Huffy Mountain Bike And I Cant Afford A Good Bike? What is a good used bike to get i have put over 10000miles on this thin last year and i think i can get allot longer distace on a good bike

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    1. Reply

      Diamondback Response Sport Mountain Bike (26-Inch Wheels)
      * Hardtail 26-inch mountain bike with aluminum all-mountain frame
      * Spinner Edge 120mm suspension fork; 8-speed trigger shifters
      * SRAM ISO-Flow crank set with replaceable chain rings; WTB Pure V sport saddle
      * Hayes mechanical disc brakes with 6-inch rotors; double-wall rims
      * Available in 14-, 16-, 18-, 20, or 22-inch frames; comes in white or dirty blue color

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  7. Reply

    Mountain Bike In Triathlon? How Much Disadvantage? I am competing in a triathlon and my only problem is the bike I have. It is a mountain bike and I’ve been told that I am at a great disadvantage by using this. How much is it going to disadvantage by ability to ride fast and well? I need answers and possible solutions as soon as possible.

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    1. Reply

      A mountain bike isn’t really ideal, but the real question is how well do you hope to perform? If you think you have a chance to be competitive, you should borrow a time trial bike or a road bike and go for it. On the other hand, if this is your first race, you are likely to have issues with your transitions, etc. and the bike probably won’t make too much difference in your overall standing.

      That said, here are some things you can do to make your mountain bike faster on the road.

      First, get some lightweight, narrow, slick, high-pressure, 26″ road tires. These will reduce the rotating mass of your wheels allowing you to accelerate more quickly. Also, they will reduce rolling resistance of the tires letting you go faster.

      Secondly, get clip-on aero bars for your mountain bike. This will reduce wind drag helping you to go faster.

      Thirdly, lock-out your fork so it doesn’t absorb energy as you pedal. If you have a full-suspension bike lock out the frame shock, or set the “platform” to high, as well.

      If you want to get really fancy, you can swap out your suspension fork for a rigid fork. Being lighter than even the best suspension forks, a rigid fork will save you a pound or two of weight. (Most bike shops have lots of rigid forks lying around because they have upgraded customers to suspension. They’ll usually sell a rigid fork for $5-$10. If you don’t know how to change a fork, the shop will charge $40-$50 to install it for you. Watch and get them to explain how they do it so you can do it yourself when it is time to put the suspension fork back on. BTW – You don’t really need to have a fancy tool to remove and set the bearing race. A hammer, a flat head screwdriver and some care will suffice.)

      If you enjoy the triathlon, you may find you want to get a tri-bike which will be somewhat lighter and more aerodynamic than your mountain bike.

      Hope this helps and hope you have lots of fun.

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