Advertise on Bikeforums.net



User Tag List

Results 1 to 16 of 16
  1. #1
    Newbie
    Join Date
    Oct 2014
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    help with front chain ring purchase - How large can I go?... and still be practicle?

    I just bought a used Bianchi Campione D'Italia set up as a single speed. It hasn't arrived yet but I already know I want to enlarge the front chain ring. How large can I go? I think it's 18 in the back.

    I live in the Portland Maine area and have been commuting solely by bike since June. It's nearly all flat land around here and so I thought I'd like to gear the bike somewhat high. How big can I go on the front?

    thanks, jack

  2. #2
    Member BilbroSwaggins's Avatar
    Join Date
    Aug 2014
    Location
    Charleston SC
    My Bikes
    ZF Prime
    Posts
    36
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I live in a relatively flat ground area as well. It's honestly all about what feels good for you. try different things out. I personally run a 49X13 for my higher ratio and on days when i wanna chill i flip my wheel to the 16T cog.
    Quote Originally Posted by Nagrom_ View Post
    Hey buddy, just 'cause you aren't man enough to push big boy gears doesn't mean its jackass.

  3. #3
    Senior Member GhostSS's Avatar
    Join Date
    Feb 2014
    Location
    Hawaii
    My Bikes
    2012 Switch Performance BlackSkin LE Urban, 2013 Leader 725, 1975 Fuji America, 1992 Giant Cadex 980c
    Posts
    291
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I haven't gone any larger than a standard modern road chainring, 53t with a 16t and 17t cog. Accelerating from stops takes some technique, but can be done to get some nice jack rabbit starts if your legs are strong enough.

    These days I'm planning on dropping to a custom 50t track chainring with a 16t cog on my Switch and a 53t with a 17t cog on my Leader, both roughly 82 GI.

    EDIT: Holy high gear Batman! 49x13 is 102 GI, that's pretty huge from the streets Bro.
    Last edited by GhostSS; 10-22-14 at 06:39 PM.

  4. #4
    Fresh Garbage hairnet's Avatar
    Join Date
    Apr 2009
    Location
    Los Angeles
    Posts
    10,976
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    I have been using a 50 and 52 for some time only because I sold my 48t and don't care the change the rings on the road cranks I have. Paired with a 21, 20, 19, 18, or 16 tooth cog.
    Quote Originally Posted by Scrodzilla View Post
    I'd rather ride a greasy bowling ball than one of those things.
    Bikerowave
    My Bikes

  5. #5
    Member BilbroSwaggins's Avatar
    Join Date
    Aug 2014
    Location
    Charleston SC
    My Bikes
    ZF Prime
    Posts
    36
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by GhostSS View Post
    EDIT: Holy high gear Batman! 49x13 is 102 GI, that's pretty huge from the streets Bro.
    Leg day all day, everyday. I use to work my legs out allot for wrestling so the higher gear doesn't bother me.
    Quote Originally Posted by Nagrom_ View Post
    Hey buddy, just 'cause you aren't man enough to push big boy gears doesn't mean its jackass.

  6. #6
    Senior Member GENESTARWIND's Avatar
    Join Date
    Dec 2011
    Location
    las vegas
    My Bikes
    pake rum runner
    Posts
    1,642
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    102gi for street....
    http://www.pedalroom.com/bike/pake-rum-runner-14226

  7. #7
    Senior Member Huffandstuff's Avatar
    Join Date
    Feb 2013
    Location
    Portland, OR
    My Bikes
    I got bikes.
    Posts
    978
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    I ran a 49x16 for a recent ride on the coast, my knees weren't happy but I'm an old man with a decrepit body. You can go as large as you'd like but youll need to run a bigger cog on the rear to compensate.

  8. #8
    bro
    bro is offline
    Senior Member bro's Avatar
    Join Date
    Nov 2012
    Location
    Flint, MI
    Posts
    680
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    if you just want a big ring up front just cause i'd say do 52 x 19

  9. #9
    T13
    T13 is offline
    Junior Member
    Join Date
    Oct 2014
    Location
    Cleveland, Ohio (for now)
    My Bikes
    A few.
    Posts
    24
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    50+ chainring up front is fine if you wanna roll one pant leg up to yer knee like a 90's crack dealer. I'd go the other way, with a 44 or so, and try different cogs in the back.

  10. #10
    Bastard of Reality Scrodzilla's Avatar
    Join Date
    May 2009
    Location
    San Diego, CA
    Posts
    24,311
    Mentioned
    24 Post(s)
    Tagged
    2 Thread(s)

  11. #11
    Veteran Racer TejanoTrackie's Avatar
    Join Date
    Jul 2009
    Location
    Ciudad de Vacas, Tejas
    My Bikes
    28 frames + 73 wheels
    Posts
    7,765
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Huffandstuff View Post
    ... but I'm an old man with a decrepit body.
    Old man ? That's hilarious !
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  12. #12
    T13
    T13 is offline
    Junior Member
    Join Date
    Oct 2014
    Location
    Cleveland, Ohio (for now)
    My Bikes
    A few.
    Posts
    24
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Scrodzilla View Post
    Thats.....Creeeepy

  13. #13
    7-speed doomsday prepper ThermionicScott's Avatar
    Join Date
    Aug 2011
    Location
    CID
    My Bikes
    1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX
    Posts
    8,541
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    In theory, the less a chain has to flex when bending around a chainring or cog, the slower it will wear. So if drivetrain wear is a prime concern, you'd want to use the largest chainring you can fit, and then size your cog accordingly to get the gearing you want. Since my fixed-gear is a converted MTB, I don't have as much clearance for a big chainring ~42mm away from the centerline as one would have on a track or road bike, so I make do with a 45T.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  14. #14
    . bbattle's Avatar
    Join Date
    Aug 2005
    Location
    Huntsville, Alabama
    My Bikes
    2014 Trek Domane 5.2, 1985 Pinarello Trevisio, 1991 Colnago Master, '06 Bianchi San Jose, 1987 Moulton Fuso, '80's Gardin Shred?, '82 John Howard(Dave Tesch)
    Posts
    11,849
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    I'm running 42-15 on my bike. That's about average gearing. Plenty fast but not so high I can't get up hills.

    You say you haven't gotten the bike in yet but you KNOW you want to make it bigger. Compensating perhaps?

    check this gear calculator out: Sheldon Brown's Bicycle Gear Calculator

  15. #15
    Senior Member Dixie Gentleman's Avatar
    Join Date
    Sep 2012
    Location
    Dirty Souf
    My Bikes
    Vigorelli
    Posts
    228
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    49x17

  16. #16
    Senior Member
    Join Date
    May 2012
    Posts
    80
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Scrodzilla View Post

    how is this the one reasonable post in here?

    Tony Martin over here trolling around on a 57 ring.

Posting Permissions

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