Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 28
  1. #1
    uberNEWB dzinehaus's Avatar
    Join Date
    Jun 2007
    Location
    Montreal, Quebec
    My Bikes
    Haro V2 [rip / stolen], PEUGEOT '93 SELECT
    Posts
    528
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Shimano MegaRange 7-Speed Freewheel

    http://www.nashbar.com/profile.cfm?c...u=18989&brand=

    Any opinions / first hand experience / compatibility issues with the Shimano MF-ZH37 MegaRange 7-Speed Freewheel 13x34T?

    I'm using a 105 short cage RD
    Be Happy, Live Life, Be Strong ~j.michaud / dzinehaus

  2. #2
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    26,146
    Mentioned
    13 Post(s)
    Tagged
    0 Thread(s)
    Shimano road rear derailleurs are rated for 27T maximum cogs. Most will allow a 30T and some will even tolerate a 32 but none I've ever heard of will work with a 34T cog. You need an MTB rd.

  3. #3
    Senior Member KLW2's Avatar
    Join Date
    Oct 2005
    Location
    White Bear Lake Mn
    My Bikes
    88 Schwin Voyageur, 84 Schwinn World Sport, 85 Univega Alpina Uno, 85 Fuji Espree, 09 Novara Strada, 06 Jamis Durango, 03 Specialized Expediton Sport, 09 Surly LHT, 12 Novara Gotham
    Posts
    758
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You do need a MTB RD, I run Mega freewheels on my bikes and many Shimano RDs will have MEGA on them to help guide you. Mine are "Deore Mega range" I pick them up as new upgrade take offs from bike shops on e-bay pretty cheap. Sheldon Brown has a listing of the newer ones with specs including max teeth...HERE is one on e-bay now,,,,

  4. #4
    uberNEWB dzinehaus's Avatar
    Join Date
    Jun 2007
    Location
    Montreal, Quebec
    My Bikes
    Haro V2 [rip / stolen], PEUGEOT '93 SELECT
    Posts
    528
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    thanks I found the tech specs for the shimano 105 shortcage read derailleur. Says 22t max front difference for the long, so i'm guessing about the same for the short maybe about 2 less. Which kinda sucks.

    27t-11t is the max-min I can go with the 105 shortcage with a max 14t front derailleur tooth difference

    back to the drawing board or I might have to pick up a mega derailleur for my haro and switch the casette to a mega range. could be interesting.

    EDIT:

    Quote Originally Posted by late
    Umm, a freewheel and a cassette are two different things.
    sorry, change the 'freewheel' on my haro.
    Last edited by dzinehaus; 06-25-07 at 09:32 PM.
    Be Happy, Live Life, Be Strong ~j.michaud / dzinehaus

  5. #5
    Senior Member late's Avatar
    Join Date
    Oct 2002
    Location
    Southern Maine
    Posts
    8,290
    Mentioned
    54 Post(s)
    Tagged
    0 Thread(s)
    Umm, a freewheel and a cassette are two different things.

  6. #6
    Senior Member Road Fan's Avatar
    Join Date
    Apr 2005
    Location
    Ann Arbor, MI
    My Bikes
    Terraferma 650b, Mondonico SL and ELOS, Masi Gran Criterium, Trek 610, Breezer Liberty, Georgena Terry Classic
    Posts
    11,200
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dzinehaus
    thanks I found the tech specs for the shimano 105 shortcage read derailleur. Says 22t max front difference for the long, so i'm guessing about the same for the short maybe about 2 less. Which kinda sucks.

    27t-11t is the max-min I can go with the 105 shortcage with a max 14t front derailleur tooth difference

    back to the drawing board or I might have to pick up a mega derailleur for my haro and switch the casette to a mega range. could be interesting.

    EDIT:


    sorry, change the 'freewheel' on my haro.
    I assume you know whether you need a freewheel or a cassette - can't be both!

    I've used Megaranges in friction shift systems with no problems, with Shimano, Campy (on a 14-28, not a 13-34!), and Huret Duopar derailleurs (13/34, beautiful!!!). The tooth design on the Shimanos picks up the chain so readily that you're going to get good shifting with any rear mech I can think of that has a 34 tooth capacity and the ability to wrap chain for perhaps 38 teeth of total sprocket difference. Shimano Deores are famous for handling this sort of range, whether or not they say "mega." You WILL need a long cage design.

    Road Fan

  7. #7
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,295
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sora Long cage RD = $15. Thread over.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  8. #8
    uberNEWB dzinehaus's Avatar
    Join Date
    Jun 2007
    Location
    Montreal, Quebec
    My Bikes
    Haro V2 [rip / stolen], PEUGEOT '93 SELECT
    Posts
    528
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by operator
    Sora Long cage RD = $15. Thread over.
    shimano saint rd 20$ bnwb
    Be Happy, Live Life, Be Strong ~j.michaud / dzinehaus

  9. #9
    JRA...
    Join Date
    Oct 2003
    Location
    philly
    My Bikes
    trek 520 & 736, DeRosa Professional, Fuji Professional, Raleigh International 3-speed, Saronni (any info people?), Humber 3-speed, Raleigh Sports, Carlton Grand Prix coming soon!
    Posts
    839
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by operator
    Sora Long cage RD = $15. Thread over.
    sora will not handle a 34T cog. play on.

    Quote Originally Posted by dzinehaus
    shimano saint rd 20$ bnwb
    saint derailleurs need saint hub to work. a deore derailleur would be a good midrange choice, but i believe all shimano MTB made in the last few years are designed to work with megarange. be sure of what you have and what you're paying money for.

  10. #10
    uberNEWB dzinehaus's Avatar
    Join Date
    Jun 2007
    Location
    Montreal, Quebec
    My Bikes
    Haro V2 [rip / stolen], PEUGEOT '93 SELECT
    Posts
    528
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dafydd
    sora will not handle a 34T cog. play on. saint derailleurs need saint hub to work.
    I thought all rear derailleurs are non-specific to hubs ? I dont see anything on the shimano saint site stating that it needs to be used in conjunction with the hub but it is suggested to be paired up with it.
    Be Happy, Live Life, Be Strong ~j.michaud / dzinehaus

  11. #11
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    26,146
    Mentioned
    13 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by operator
    Sora Long cage RD = $15. Thread over.
    Not quite. The Sora is a road derailleur and same cog size limitations apply. Thread to continue.

  12. #12
    JRA...
    Join Date
    Oct 2003
    Location
    philly
    My Bikes
    trek 520 & 736, DeRosa Professional, Fuji Professional, Raleigh International 3-speed, Saronni (any info people?), Humber 3-speed, Raleigh Sports, Carlton Grand Prix coming soon!
    Posts
    839
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dzinehaus
    I thought all rear derailleurs are non-specific to hubs ? I dont see anything on the shimano saint site stating that it needs to be used in conjunction with the hub but it is suggested to be paired up with it.

    it's not so much a suggestion as mandate, the derailleurs bolt directly to the axle.


  13. #13
    Brian L. Baker Hardheadmandca's Avatar
    Join Date
    Feb 2007
    Location
    Fresno, CA
    My Bikes
    Specialized Sirrus - 2000?
    Posts
    400
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by HillRider
    Shimano road rear derailleurs are rated for 27T maximum cogs. Most will allow a 30T and some will even tolerate a 32 but none I've ever heard of will work with a 34T cog. You need an MTB rd.
    My Dura-Ace 9 speed will do a 34t, but it's kinda grumbly about it.
    Brian

    Cervelo Dual/Calfee Tetra Pro/Kestrel 200sc/Specialized Sirrus/Diamondback Ascent/Centurion Fixie

  14. #14
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,295
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dafydd
    sora will not handle a 34T cog. play on.
    My bad. I got temporarily confused with the bottom of the line Shimano stuff.

    I meant shimano tourney, long cage.

    Thread over.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  15. #15
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    26,146
    Mentioned
    13 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Hardheadmandca
    My Dura-Ace 9 speed will do a 34t, but it's kinda grumbly about it.
    Yours is the first I've seen reported that will do it at all.

  16. #16
    Senior Member rmikkelsen's Avatar
    Join Date
    Sep 2006
    Location
    Plaistow, NH
    My Bikes
    '78 Chris Kvale, '87 Paramount
    Posts
    460
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'd like to know what kind of experiences people have had RIDING with the Megarange. Do you wish there were some intermediate cogs, or is it enough to have bailout gear for the really steep stuff? I do pretty well on rolling hills with my existing setups (52-42/13-26 6 speed set up and a 53-39/13-28 7 speed), but I'm pretty sure those aren't enough to carry me through the mountains.

  17. #17
    Senior Member z415's Avatar
    Join Date
    Apr 2006
    Location
    Gainesville/Tampa, FL
    My Bikes
    Trek 1000, two mtbs and working on a fixie for commuting.
    Posts
    2,347
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by rmikkelsen
    I'd like to know what kind of experiences people have had RIDING with the Megarange. Do you wish there were some intermediate cogs, or is it enough to have bailout gear for the really steep stuff? I do pretty well on rolling hills with my existing setups (52-42/13-26 6 speed set up and a 53-39/13-28 7 speed), but I'm pretty sure those aren't enough to carry me through the mountains.
    It is horrible. My roommate's girlfriend's bike has it, as did his before he upgraded to 9s and the large gear differences don't feel right. Hopping on the the "bailout" cog is quite an experience - no matter how steep the climb I just can't get used to suddenly spinning like a madman, and I keep a pretty high cadence in riding. And then if you slow down your spin, your momentum is so slow it feels like trackstand practice.

    I personally wouldn't get it unless I was sure I needed it.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  18. #18
    Elitist Troglodyte DMF's Avatar
    Join Date
    Jun 2006
    Location
    Dallas
    My Bikes
    03 Raleigh Professional (steel)
    Posts
    6,896
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Hardheadmandca
    My Dura-Ace 9 speed will do a 34t, but it's kinda grumbly about it.
    Only on the small ring, I'll bet.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

  19. #19
    uberNEWB dzinehaus's Avatar
    Join Date
    Jun 2007
    Location
    Montreal, Quebec
    My Bikes
    Haro V2 [rip / stolen], PEUGEOT '93 SELECT
    Posts
    528
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by z415
    It is horrible. My roommate's girlfriend's bike has it, as did his before he upgraded to 9s and the large gear differences don't feel right. Hopping on the the "bailout" cog is quite an experience - no matter how steep the climb I just can't get used to suddenly spinning like a madman, and I keep a pretty high cadence in riding. And then if you slow down your spin, your momentum is so slow it feels like trackstand practice.

    I personally wouldn't get it unless I was sure I needed it.

    I was thinking it would be worth a try and could be interesting on a 53t dbl. Needless to say they is that it would only work on my mtb.

    But the horrible comment on the bail-out cog kinda makes me picture anyone pedaling in the void. funny.
    Be Happy, Live Life, Be Strong ~j.michaud / dzinehaus

  20. #20
    Senior Member late's Avatar
    Join Date
    Oct 2002
    Location
    Southern Maine
    Posts
    8,290
    Mentioned
    54 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by rmikkelsen
    I'd like to know what kind of experiences people have had RIDING with the Megarange. Do you wish there were some intermediate cogs, or is it enough to have bailout gear for the really steep stuff? I do pretty well on rolling hills with my existing setups (52-42/13-26 6 speed set up and a 53-39/13-28 7 speed), but I'm pretty sure those aren't enough to carry me through the mountains.
    Personally, I need that 34T gear. You can get a low gear of 30T or 32T if you want.
    Harris Cyclery makes something they call the Century Special. It has a low gear of 30T and will work with your existing short cage derailleur.

  21. #21
    Banned
    Join Date
    Dec 2004
    Posts
    616
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Shimano makes that same 7sp freewheel in several configurations that have a 28t large cog. I see several replies that suggest that any of the long cage 105, Ultegra, or DA rear derailleurs will work ok with a 28t max cog, even though they are listed as 27t max cog. Why not go with the freewheel in a 28t max, instead of going with that Megarange that has the 34t large cog. Pair the smaller freewheel with a triple or compact double crank, and that would seem like it would give you adequate gearing range. I'm wrestling with these same issues, as I have an old bike I am restoring that will have to use a freewheel, and I'm looking at what other drive train parts I can get to match with the freewheel.

  22. #22
    uberNEWB dzinehaus's Avatar
    Join Date
    Jun 2007
    Location
    Montreal, Quebec
    My Bikes
    Haro V2 [rip / stolen], PEUGEOT '93 SELECT
    Posts
    528
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ginsoakedboy
    Shimano makes that same 7sp freewheel in several configurations that have a 28t large cog. I see several replies that suggest that any of the long cage 105, Ultegra, or DA rear derailleurs will work ok with a 28t max cog, even though they are listed as 27t max cog. Why not go with the freewheel in a 28t max, instead of going with that Megarange that has the 34t large cog. Pair the smaller freewheel with a triple or compact double crank, and that would seem like it would give you adequate gearing range. I'm wrestling with these same issues, as I have an old bike I am restoring that will have to use a freewheel, and I'm looking at what other drive train parts I can get to match with the freewheel.

    I was just gonna cross-post to your posting and say we already covered your issue in my thread. the issue is that the long cage will do it, its a matter of adjusting the low gear pin / screw. the short cage just doesnt have enough reach. I'll probably still pick up the mega-rage for my mtb that im slowly gonna convert to a hybrid/commuter as the frame geometry almost encourages it. Montreal is filled with beautiful climbs and flat roads. The mega-range would be more of a test toy at that point for me for the cost that it sells for on nashbar.com
    Be Happy, Live Life, Be Strong ~j.michaud / dzinehaus

  23. #23
    Senior Member Road Fan's Avatar
    Join Date
    Apr 2005
    Location
    Ann Arbor, MI
    My Bikes
    Terraferma 650b, Mondonico SL and ELOS, Masi Gran Criterium, Trek 610, Breezer Liberty, Georgena Terry Classic
    Posts
    11,200
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by rmikkelsen
    I'd like to know what kind of experiences people have had RIDING with the Megarange. Do you wish there were some intermediate cogs, or is it enough to have bailout gear for the really steep stuff? I do pretty well on rolling hills with my existing setups (52-42/13-26 6 speed set up and a 53-39/13-28 7 speed), but I'm pretty sure those aren't enough to carry me through the mountains.
    I rather like it, here in Michigan. You get a fairly close ratio and nicely spaced 13-24, then a bail-out gear. Lately I only use the bail out on steep tired climbs. a 42/34 gear is a lot lower than your 39/28.

    I do wish I had a smooth range of gears that bridged sometimes between the 24 and the 34. Lately I want more cadence tuning at slower speed/high cadence, something like a 28 T gear in between the 24 and the 34. So I guess on some rides the 34 is too low, and the 24 is too high!

    Road Fan

  24. #24
    Senior Member Road Fan's Avatar
    Join Date
    Apr 2005
    Location
    Ann Arbor, MI
    My Bikes
    Terraferma 650b, Mondonico SL and ELOS, Masi Gran Criterium, Trek 610, Breezer Liberty, Georgena Terry Classic
    Posts
    11,200
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by late
    Personally, I need that 34T gear. You can get a low gear of 30T or 32T if you want.
    Harris Cyclery makes something they call the Century Special. It has a low gear of 30T and will work with your existing short cage derailleur.
    Century Special is a wonderful product, but recognize it is a CASSETTE, not a FREEWHEEL.

    Road Fan

  25. #25
    Senior Member Road Fan's Avatar
    Join Date
    Apr 2005
    Location
    Ann Arbor, MI
    My Bikes
    Terraferma 650b, Mondonico SL and ELOS, Masi Gran Criterium, Trek 610, Breezer Liberty, Georgena Terry Classic
    Posts
    11,200
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ginsoakedboy
    Shimano makes that same 7sp freewheel in several configurations that have a 28t large cog. I see several replies that suggest that any of the long cage 105, Ultegra, or DA rear derailleurs will work ok with a 28t max cog, even though they are listed as 27t max cog. Why not go with the freewheel in a 28t max, instead of going with that Megarange that has the 34t large cog. Pair the smaller freewheel with a triple or compact double crank, and that would seem like it would give you adequate gearing range. I'm wrestling with these same issues, as I have an old bike I am restoring that will have to use a freewheel, and I'm looking at what other drive train parts I can get to match with the freewheel.
    Actually I do this on my Woodrup, it has a 13-26 freesheel and a 52/42/36 racing triple crankset. Works well with a long-cage Campy derailleur, needed to wrap up all that chain.

    Road Fan

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
  •