1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

MTB experts, help!

Discussion in 'Sports Arena' started by Duradrum, 3 Aug 2006.

  1. Duradrum

    Wise Guy

    Joined: 25 Jun 2004

    Posts: 1,146

  2. Guybrush

    Banned

    Joined: 1 Nov 2003

    Posts: 632

    Location: St. Albans

    it's the distance from the centre of the bottom bracket spindle to the centre of the pedal shaft.

    175mm is standard, 170mm is for if you're a wee man.
     
  3. 6thElement

    Sgarrista

    Joined: 17 Oct 2002

    Posts: 9,055

    Location: In my penthouse, Park Ave

    As above, the 170mm would normally be used on a small frame, 175mm for everything else.
     
  4. bolger

    Gangster

    Joined: 21 Jul 2006

    Posts: 388

    Location: Motherwell, Scotland

    Imo its more about preferance rather than your height.

    I run 165mm cranks on my dh bike and im 6ft 1.

    If your pedals hit the ground alot, then go for the 170s otherwise 175s. I run 175s on my xtc and never had a problem with ground clearance.
     
  5. Pete_m

    Gangster

    Joined: 6 Jul 2006

    Posts: 264

    Location: Chesterfied

    exactly as the guy above me says.. shorter cranks are more desirable for serious off road stuff where your pedals hit the floor/rocks alot, and thats why they tend to be more.

    175mm is the international standard

    good choice too.. raceface are the dogs when it comes to chainsets
     
  6. Guybrush

    Banned

    Joined: 1 Nov 2003

    Posts: 632

    Location: St. Albans

    you really notice the difference a lot more than you might think pedalling 170s as opposed to 175s... if pedal strikes were an issue id get a frame with a higher BB rather than change crank stroke.
     
  7. Duradrum

    Wise Guy

    Joined: 25 Jun 2004

    Posts: 1,146

    Thanks for the help. Ordered the 175mm. I'm 6'3 and the XTC frame is 21" so it should be fine.

    My original crank has bent. I looked at the price of the the original Truvativ one that came on the bike, its only £30. Looks like they cut costs on the cranks on these bikes!
     
  8. bolger

    Gangster

    Joined: 21 Jul 2006

    Posts: 388

    Location: Motherwell, Scotland

    Why not just change your gearing ratio rather than changing frame :confused:

    Longer cranks dont make it easier or more efficient to pedal, you just need to change your gear ratios due to the difference in leverage.

    Edit : im just adding that longer cranks dont make pedalling any easier, not directed at you just letting the op know what difference crank length makes :)
     
    Last edited: 3 Aug 2006
  9. Guybrush

    Banned

    Joined: 1 Nov 2003

    Posts: 632

    Location: St. Albans

    who said anything about gearing? It's the physical movement of my feet that I'm talking about. I'm a long legged 6'2" and to me 170s feel very odd (though id probably get used to it... but still less efficient from an anatomical point of view) and 165s feel like im riding a child's bike.
     
    Last edited: 3 Aug 2006
  10. Oakesy2001uk

    Mobster

    Joined: 7 Sep 2005

    Posts: 3,312

    about say, my street/jump bike has 165's and I'm 6 foot 1, its all about preference, hard to explain, its all about feel, I have ridden some expensive bikes that feel carp, I love mine to bits