Advertise on Bikeforums.net



User Tag List

Results 1 to 4 of 4
  1. #1
    Senior Member
    Join Date
    Aug 2008
    Location
    SoCal
    Posts
    1,994
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Which crank to go 175mm?

    I have a 20 year old Suntour drive train and it's a 170mm. It works fine but after riding my other bike with 175mm I know that I prefer that length.

    Any ideas on what to replace it with that isn't so new it won't work?
    It has a Suntour BB but I don't know what kind of taper it has.

    Also the existing crank has 42/53 rings so I am guessing a replacement would have 39/52 rings. Will I need a new FD to handle that?
    Hmmm, and how would 39/52 work with my existing 7 speed freewheel as far as ratios? Maybe I could find a 175mm crank and put my existing rings on it...

  2. #2
    Piney the Elder -holiday76's Avatar
    Join Date
    Jan 2008
    Location
    San Jose(Naglee Park), Ca
    Posts
    5,105
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i'd think most any square taper double crank in 175 will bolt right up. I'd also expect that the same front derailleur that shifts between 53-42 will also shift between 52/39. That's not much of a difference. Heck, Ive used derailleur's meant for doubles to shift triples, so I'm sure what you'd like to do is fine.
    Last edited by -holiday76; 03-01-09 at 08:39 PM.
    Mmm, bikes.

    I prefer emails to private messages - holiday76@gmail.com

  3. #3
    slow as I ever was Ex Pres's Avatar
    Join Date
    Dec 2007
    Location
    an imposter living in the 35223
    My Bikes
    see signature
    Posts
    5,459
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Post a swap of your 170mm Suntour for a like 175mm in the ISO/WTB thread. You never know.
    72 special CNC ___________ 72 Frejus (ala Legnano) __73 Holdsworth Record
    78 Raleigh Professional_____ 80 Ranson_____________ 80 unknown French (SS)
    82 Peugeot PXN10_________83 Trek 600____________ 85 Gianni Motta
    85 Trek 560______________88 Guerciotti GLX
    90 Miele Gara_____________02 Casati Dardo (g/b\k)___02 Casati Dardo (y/blk)
    03 Casati Dardo___________08 BF IRO (fixed)________10 Vassago Fisticuff (IGH)

  4. #4
    Senior Member Deanster04's Avatar
    Join Date
    Dec 2005
    Location
    Boulder, Colorado
    My Bikes
    Cinelli Supercoursa 69, Ritchey Breakaway Cross, Mondonico Diamond Extra 05, Coors Light Greg Lemond (built by Scapin) 88, Scapin MTB, Stumpjumper 83, Specialized Stumpjumper M4, Lemond Poprad 2001
    Posts
    1,366
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Siguno makes square taper cranks. Try the Quality Catalog at your LBS. They aren't expensive.

Posting Permissions

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