Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 31
  1. #1
    I'm Carbon Curious 531phile's Avatar
    Join Date
    Aug 2005
    Location
    Earthquake Central
    My Bikes
    Enough
    Posts
    2,195
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Anyone run low teeth combos to save weight?

    This is for a singlespeed.

    I'm thinking I could save some weight by running a low teeth combo of chainring & cog like a 34 x 12 which equals 74.5 gear inches.

    Anyone do this? How much weight savings? Would it be worth it for a closet weight weenie?

    I figure the chain would be shorter and the smaller chainring and cog would help shave off some weight.

    I know less teeth would mean faster wear, but I am not worried too much about that since chains are relatively cheap.

    Quote Originally Posted by avner View Post
    I loled. Twice. Then I cried. Then I rubbed one out and cried again, but thanks for sharing.

  2. #2
    Bicycle Repair Man !!! Sixty Fiver's Avatar
    Join Date
    Sep 2007
    Location
    YEG
    My Bikes
    See my sig...
    Posts
    25,930
    Mentioned
    14 Post(s)
    Tagged
    2 Thread(s)
    Do consider that when you run a rear cog with less than 14 teeth you decrease efficiency and will experience greater drive train wear than you would by running a larger combination.

  3. #3
    I'm Carbon Curious 531phile's Avatar
    Join Date
    Aug 2005
    Location
    Earthquake Central
    My Bikes
    Enough
    Posts
    2,195
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    what do you mean by efficiency?

    Quote Originally Posted by avner View Post
    I loled. Twice. Then I cried. Then I rubbed one out and cried again, but thanks for sharing.

  4. #4
    dsh
    dsh is offline
    Oh, you know... dsh's Avatar
    Join Date
    May 2009
    Location
    DC
    My Bikes
    '74 Schwinn Sports Tourer (Polo), S-Works E5 Team Festina (Chorus 11), Trek 2200 Bonded Carbon (Fixed), Trek 920 (7 speed IGH), Chesini Olimpiade SL (1x7)
    Posts
    2,838
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Has anyone considered filling their innertubes with helium?

  5. #5
    Bicycle Repair Man !!! Sixty Fiver's Avatar
    Join Date
    Sep 2007
    Location
    YEG
    My Bikes
    See my sig...
    Posts
    25,930
    Mentioned
    14 Post(s)
    Tagged
    2 Thread(s)
    A drive train using a 52/18 will give you about 74 gear inches and with this the chain engages more teeth and with greater engagement stresses on the chain, chain ring, and drive cog are reduced.

  6. #6
    I'm Carbon Curious 531phile's Avatar
    Join Date
    Aug 2005
    Location
    Earthquake Central
    My Bikes
    Enough
    Posts
    2,195
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    OK. Would 39 x 14 be an acceptable balance then? or should I go for more teeth?

    Quote Originally Posted by avner View Post
    I loled. Twice. Then I cried. Then I rubbed one out and cried again, but thanks for sharing.

  7. #7
    Senior Member Capocaccia's Avatar
    Join Date
    May 2010
    Posts
    403
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 531phile View Post
    what do you mean by efficiency?
    ef·fi·cien·cy

     /ɪˈfɪʃənsi/ Show Spelled[ih-fish-uhn-see]
    –noun, plural -cies. 1. the state or quality of being efficient; competency in performance.

    2. accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort: The assembly line increased industry's efficiency.

    3. the ratio of the work done or energy developed by a machine, engine, etc., to the energy supplied to it, usually expressed as a percentage.

    4. efficiency apartment.
    Quote Originally Posted by Scrodzilla View Post
    They sell furniture too. ****ing posers.

  8. #8
    Antarctica awaits WoundedKnee's Avatar
    Join Date
    Jun 2009
    Location
    Tucson, Zona
    Posts
    1,961
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I use 39x16 for my all around gear.

  9. #9
    I'm Carbon Curious 531phile's Avatar
    Join Date
    Aug 2005
    Location
    Earthquake Central
    My Bikes
    Enough
    Posts
    2,195
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I think I'm going to go for 39 x 14 and see how long my drivetrain last. I've went to weight weenies.com and 34 x 12 and the 7 links that it would save me only 23 grams. Not worth it. Just another crack pipe dream of mine. Thanks for the input.

    Quote Originally Posted by avner View Post
    I loled. Twice. Then I cried. Then I rubbed one out and cried again, but thanks for sharing.

  10. #10
    Senior Member Capocaccia's Avatar
    Join Date
    May 2010
    Posts
    403
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 531phile View Post
    I think I'm going to go for 39 x 14 and see how long my drivetrain last. I've went to weight weenies.com and 34 x 12 and the 7 links that it would save me only 23 grams. Not worth it. Just another crack pipe dream of mine. Thanks for the input.
    You do understand you could save 10 times more weight than that by drinking a cup less water dont you?
    Quote Originally Posted by Scrodzilla View Post
    They sell furniture too. ****ing posers.

  11. #11
    Senior Member
    Join Date
    May 2007
    Location
    Miami, FL
    My Bikes
    1986 Fuji Allegro 12 Spd; 1997 Fuji MX-200 21 Spd; 2010 Vilano SS/FG 46/16
    Posts
    1,913
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Mine came with 46/16. I think I'd only change it out if it became too easy to pedal and I felt like I was at a point where I could constantly ride it with a stronger GI. Riding with the wind, there have been occasions where I wished the gear was stronger, but riding into enough of a head wind the gear could probably be weaker. A couple of weeks back I rode about 12.5 miles into a 25 mph NE'er, 46/16 was slow going. The ride back was way to easy. That ride was strange, I figure I was matching the wind speed, it was like there was no wind at all coming home. But getting to the 1/2 point to turn around was more workout than I wanted.

    As for fewer teeth to save weight, there isn't enough difference to matter really.

  12. #12
    Elitist carleton's Avatar
    Join Date
    Jul 2005
    Location
    Atlanta, GA
    Posts
    10,941
    Mentioned
    6 Post(s)
    Tagged
    1 Thread(s)
    Yeah, it will work. But, you'd probably save more weight in a more effective way by switching to lighter tires and tubes.

    Going the weight weenie route is a slippery slope. But, I won't say it's not worth it. Without trying hard, I got this 57cm bike to 16lbs (including the rear light and MTB pedals) and it climbed like a dream.


  13. #13
    Banana-tastic! JesusBananas's Avatar
    Join Date
    May 2010
    Posts
    1,974
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dsh View Post
    Has anyone considered filling their innertubes with helium?
    But hydrogen is lighter!

    OP, if you really want to be a weight weenie, focus on big things like frame material. The number of teeth in a cog is not going to make an appreciable difference, especially if you're not running the gear inches that are best for you . . .
    Quote Originally Posted by striknein View Post
    The banana has spoken.
    Quote Originally Posted by Sixty Fiver View Post
    "This rides nearly as nicely as your mom."

  14. #14
    GONE~
    Join Date
    Apr 2010
    Posts
    6,745
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Smaller sized ratio will stretch and snap chains much easier than a larger ratio.

    I'd go with something larger like 45/16 or 47/17, both of which will give you a very similar ratio.

  15. #15
    Elitist carleton's Avatar
    Join Date
    Jul 2005
    Location
    Atlanta, GA
    Posts
    10,941
    Mentioned
    6 Post(s)
    Tagged
    1 Thread(s)
    Cheap-ish ways to shave lbs from an "normal" FG bike. This is assuming you have a budget bike.

    - Lightweight tires
    - Lightweight tubes
    - Lightweight chain
    - Alloy (not steel) bars
    - Lighter seatpost (take-off from a road bike)
    - Road clipless pedals
    - Lightweight saddle

    Not-so-cheap ways:
    - Cranks
    - Wheels (Lots of weight savings possible here. Mavic Ellipse are my all-time super-light but strong wheelset)
    - Frame (Aluminum and Carbon come in about the same. Anything but steel.)



    Of course, none of this makes much sense if you are gonna ride around in blue jeans, tshirt, shirt, and a wool jacket with a XL messenger bag with random stuff in it. You could spend hundreds of dollars removing 5 lbs from your bike...or you could clean out your bag.

  16. #16
    Member APER, Man!'s Avatar
    Join Date
    Jun 2010
    Location
    Sonoma County, CA
    Posts
    41
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by carleton View Post
    Yeah, it will work. But, you'd probably save more weight in a more effective way by switching to lighter tires and tubes.

    Going the weight weenie route is a slippery slope. But, I won't say it's not worth it. Without trying hard, I got this 57cm bike to 16lbs (including the rear light and MTB pedals) and it climbed like a dream.

    That's awesome. Would you mind posting the specs?
    1989 Kestrel 200 SCi

  17. #17
    Elitist carleton's Avatar
    Join Date
    Jul 2005
    Location
    Atlanta, GA
    Posts
    10,941
    Mentioned
    6 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by APER, Man! View Post
    That's awesome. Would you mind posting the specs?
    Thanks.

    That bike was like 2005. This is from memory:

    - Vittoria something "Pro" tires. $60 a pop. They were light and sticky. Not for skidding for fun.
    - Continental Lite tubes
    - Sugino 75 with 48t Sugino Zen ring
    - TIME ATAC pedals
    - Mavic Ellipse wheels (stickers removed)
    - Profile Airwing bars with cloth tape
    - Fizik Arione saddle with stock seatpost
    - KMC K710 chain (stock for that bike)
    - Euro Asia 18t cog
    - Stock stem

    I would guess that a lightweight chain (K710 is heavy) and Dura Ace pedals would have that bike in the 15lb area for sure.

  18. #18
    Senior Member mihlbach's Avatar
    Join Date
    Dec 2005
    Location
    Long Island, NY
    Posts
    6,342
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I run 38x15 on my SS cyclocross bike with cyclocross tires during the 3 or 4 coldest months. I mostly use it for commuting, especially in bad weather. Works great in poor weather and having the small chainring gives me the option of gearing it even lower if needed, which I occasionally do. I use a Surly steel chainring to minimize wear and in the warmer months, I swap my chainring and cog out for a 48x17 and install road tires.
    Last edited by mihlbach; 10-24-10 at 04:31 AM.

  19. #19
    Senior Member Steev's Avatar
    Join Date
    Jul 2005
    Location
    Backwoods of Ontario
    Posts
    2,129
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by carleton View Post
    Cheap-ish ways to shave lbs from an "normal" FG bike. This is assuming you have a budget bike.

    - Lightweight tires
    - Lightweight tubes
    - Lightweight chain
    - Alloy (not steel) bars
    - Lighter seatpost (take-off from a road bike)
    - Road clipless pedals
    - Lightweight saddle

    Not-so-cheap ways:
    - Cranks
    - Wheels (Lots of weight savings possible here. Mavic Ellipse are my all-time super-light but strong wheelset)
    - Frame (Aluminum and Carbon come in about the same. Anything but steel.)



    Of course, none of this makes much sense if you are gonna ride around in blue jeans, tshirt, shirt, and a wool jacket with a XL messenger bag with random stuff in it. You could spend hundreds of dollars removing 5 lbs from your bike...or you could clean out your bag.
    You forgot full carbon fork.

    Quote Originally Posted by carleton View Post
    Thanks.

    That bike was like 2005. This is from memory:

    - Vittoria something "Pro" tires. $60 a pop. They were light and sticky. Not for skidding for fun.
    - Continental Lite tubes
    - Sugino 75 with 48t Sugino Zen ring
    - TIME ATAC pedals
    - Mavic Ellipse wheels (stickers removed)
    - Profile Airwing bars with cloth tape
    - Fizik Arione saddle with stock seatpost
    - KMC K710 chain (stock for that bike)
    - Euro Asia 18t cog
    - Stock stem

    I would guess that a lightweight chain (K710 is heavy) and Dura Ace pedals would have that bike in the 15lb area for sure.
    How much did those stickers weigh?

  20. #20
    I'm band already? lubes17319's Avatar
    Join Date
    Jan 2006
    Location
    in a ditch
    My Bikes
    wheels, brakes & bars
    Posts
    1,007
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    This dood knows how to lose weight/money on a bike.
    Who cares what your bike weighs, just ride it!

  21. #21
    Banned.
    Join Date
    Apr 2010
    Location
    Chicago IL
    My Bikes
    trek t1
    Posts
    331
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don't think anyone goes with low teeth for the reason to save weight. That just sounds silly.

  22. #22
    Elitist carleton's Avatar
    Join Date
    Jul 2005
    Location
    Atlanta, GA
    Posts
    10,941
    Mentioned
    6 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by Steev View Post
    How much did those stickers weigh?
    Not much. I took the stickers off for the look, not to save weight. But there were a lot of them and lots of glue. I mentioned the removal because people often ask me "What wheels are those?" because it's unusual to see them with no stickers.

  23. #23
    * adriano's Avatar
    Join Date
    Nov 2008
    Location
    Baltimore
    My Bikes
    http://velospace.org/node/18951
    Posts
    6,890
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 531phile View Post
    This is for a singlespeed.

    I'm thinking I could save some weight by running a low teeth combo of chainring & cog like a 34 x 12 which equals 74.5 gear inches.

    Anyone do this? How much weight savings? Would it be worth it for a closet weight weenie?

    I figure the chain would be shorter and the smaller chainring and cog would help shave off some weight.

    I know less teeth would mean faster wear, but I am not worried too much about that since chains are relatively cheap.
    loving 531 seems to be weighing on you. steel is fail.

  24. #24
    :)
    Join Date
    Nov 2006
    Location
    duluth
    My Bikes
    '07 Pista, '09 Fantom Cross Uno, '8? Miyata, '67 Stingray, '0? Zoo mod trials, Tallbike, Chopper, '73 Schwinn Collegiate, '67 Triumph Chopper, '69 CB350, '58 BSA Spitfire, '73 CB450
    Posts
    3,391
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The reduced efficiency will make a much, much bigger difference than the couple grams of weight savings. T
    Quote Originally Posted by Santaria View Post
    because physics has more street cred than tarckstars.

  25. #25
    Member APER, Man!'s Avatar
    Join Date
    Jun 2010
    Location
    Sonoma County, CA
    Posts
    41
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by carleton View Post
    Not much. I took the stickers off for the look, not to save weight. But there were a lot of them and lots of glue. I mentioned the removal because people often ask me "What wheels are those?" because it's unusual to see them with no stickers.
    What was the weight of the bike when it was stock? I'm guessing in the 20s. but I could be wrong.
    1989 Kestrel 200 SCi

Page 1 of 2 12 LastLast

Posting Permissions

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