Why get rid of the compact crank design?- Mtbr.com
Results 1 to 15 of 15
  1. #1
    rad to the power of sick
    Reputation: superlightracer's Avatar
    Join Date
    Feb 2004
    Posts
    1,968

    Why get rid of the compact crank design?

    Hey all,

    Just a curiosity, why did bike companies get rid of the compact drive design? (5 bolt 94 bcd)

    From what ive seen, a CD has many more ring options especially for the middle ring. With the current 4bolt 104 mm the smallest middle ring you can run is a 30t...

    Insider ideas anyone?
    Some great sets for the trainer:
    https://www.mixcloud.com/djfeelgood/

  2. #2
    mtbr member
    Reputation: Danke's Avatar
    Join Date
    Sep 2005
    Posts
    537
    Light makes right.

  3. #3
    mtbr member
    Reputation:
    Join Date
    Nov 2006
    Posts
    549
    i don't know but i was wondering the same thing.

  4. #4
    Doesntplaywellwithmorons!
    Reputation: DeeEight's Avatar
    Join Date
    Jan 2004
    Posts
    10,861
    4 bolt rings were stiffer is the argument I remember on rec.bicycles.tech which Keith Bontrager put forward in support of the 4-bolt cranks.
    I don't post to generate business for myself or make like I'm better than sliced bread

  5. #5
    On MTBR hiatus :(
    Reputation: Speedub.Nate's Avatar
    Join Date
    Dec 2003
    Posts
    9,120
    Quote Originally Posted by DeeEight
    4 bolt rings were stiffer is the argument I remember on rec.bicycles.tech which Keith Bontrager put forward in support of the 4-bolt cranks.
    If four bolt is stiffer, then three-bolt must be stiffest, right?

    <img src="https://www.booboodog.net/images/bent-surly-ss-ring.gif">
    speedub.nate
    MTBR Hiatus UFN

  6. #6
    SUBLIM8er
    Reputation: Axis II's Avatar
    Join Date
    May 2004
    Posts
    2,203
    Because new bolt patterns sell more cranksets- 'cause they are new!
    Every man has inside himself a parasitic being who is acting not at all to his advantage.
    William S. Burroughs

  7. #7
    mtbr member
    Reputation:
    Join Date
    Jun 2004
    Posts
    832
    If Raceface was to re-introduce the Turbine crank in optional square and ISIS with compact drive in the latest aluminum alloys they would sell very well IMO. Expect this to happen once almost everyone has "upgraded" to outboard bearings.

  8. #8
    mtbr member
    Reputation: Some Guy's Avatar
    Join Date
    Mar 2005
    Posts
    1,482
    Quote Originally Posted by DeeEight
    4 bolt rings were stiffer is the argument I remember on rec.bicycles.tech which Keith Bontrager put forward in support of the 4-bolt cranks.
    Strange, wonder why. Symetry perhaps.

  9. #9
    I love Pisgah
    Reputation: Duckman's Avatar
    Join Date
    Jan 2004
    Posts
    3,407
    I'd bet 4 bolt cranks are plain ol cheaper to mfg.

    I still have three 5 bolt(2 cmpt, 1 std) cranks in service on my best bikes atm. Not an outboard crank in the house tho. Prolly never will be. Something will simply change again before that happens.

  10. #10
    I love Pisgah
    Reputation: Duckman's Avatar
    Join Date
    Jan 2004
    Posts
    3,407
    I'd bet 4 bolt cranks are plain ol cheaper to mfg.

    I still have three 5 bolt(2 cmpt, 1 std) cranks in service on my best bikes atm. Not an outboard crank in the house tho. Prolly never will be. Something will simply change again before that happens.

  11. #11
    rad to the power of sick
    Reputation: superlightracer's Avatar
    Join Date
    Feb 2004
    Posts
    1,968
    Yea the outboard bearing bandwagon is about full now...I guess we need a change.
    Some great sets for the trainer:
    https://www.mixcloud.com/djfeelgood/

  12. #12
    mtbr member
    Reputation: Danke's Avatar
    Join Date
    Sep 2005
    Posts
    537
    I think the murder of the ISIS interface is a bit of a mistake.

  13. #13
    On MTBR hiatus :(
    Reputation: Speedub.Nate's Avatar
    Join Date
    Dec 2003
    Posts
    9,120
    Quote Originally Posted by Danke
    I think the murder of the ISIS interface is a bit of a mistake.
    ISIS died of testicular cancer.
    speedub.nate
    MTBR Hiatus UFN

  14. #14
    mtbr member
    Reputation: Joules's Avatar
    Join Date
    Oct 2005
    Posts
    3,268
    4-bolt is what Shimano wanted to sell. They offer all the chainring sizes you'd ever want, provided you don't want anything but 22/32/44.

  15. #15
    damaged
    Reputation: npoak's Avatar
    Join Date
    Jan 2007
    Posts
    35
    Quote Originally Posted by Danke
    I think the murder of the ISIS interface is a bit of a mistake.
    This I agree with. I adore the ISIS system and have NEVER had a problem with any ISIS BB I've ridden...not the connection to the crank.

Members who have read this thread: 0

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

THE SITE

ABOUT MTBR

VISIT US AT

© Copyright 2019 VerticalScope Inc. All rights reserved.