Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 39
  1. #1
    Senior Member
    Join Date
    Jul 2012
    Location
    N Fla.
    My Bikes
    new Trek3700,Experianced Raleigh500RT.
    Posts
    118
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Advice Wanted on Compact Crank on older Bike.

    I have a early 90's Raleigh RT 500 42/53,13-14-15-16-17-19-21 cassette All components Shimano 105. I need to gear this bike down. It is just too hard for me to pedel.(It was Great 20 yr ago)/. Shifters on downtube now set on friction.
    At first glance it looks like the easiest way to do this is replacing my 42/53 chainwheel with a compact 34/50t. I saw several affordable ones on Azon.xom like Shimano FC-2350 Crankset.I was planning on overhauling the BB anyway.

    Anyone know if a compact crankset will bolt right up to my bike? Any barriers or cautionns up ahead? I read somewhere I might need spacers? between the compact sprockets.

    Would a triple compact be even Possible?(without major changes)

    Any Advice or Warnings Welcome.

    Thanks
    Dave.

  2. #2
    What??? Only 2 wheels? jimmuller's Avatar
    Join Date
    Apr 2010
    Location
    Boston-ish, MA
    My Bikes
    '73 Raleigh Carlton Gran Sport, '72 Peugeot UO-8, '82 Peugeot TH8, '87 Bianchi Brava, '76? Masi Grand Criterium, '72 Bertin C32, '87 Centurion Ironman Expert, '74 Motobecane Champion Team, and lots of uncertainty on some
    Posts
    7,449
    Mentioned
    41 Post(s)
    Tagged
    1 Thread(s)
    Do you need to replace the entire crankset? Why not just the chainrings? As long as the Bolt Circle Diameter (BCD) is the same you shouldn't have any trouble. Or maybe somebody knows something about the 105 crank that I don't know. I'm a noobie when it comes to new equipment.

    110mm is a common BCD, but I don't know what your 105 is. I would recommend 48/34 unless you have any special reason to go with a 52T ring. Go to
    http://www.gear-calculator.com
    to see how the rings fit into the sprocket spacings.
    Real cyclists use toe clips.
    jimmuller

  3. #3
    DRF aka Thrifty Bill wrk101's Avatar
    Join Date
    Jan 2008
    Location
    The NC Mountains
    My Bikes
    Too many to list, all vintage
    Posts
    19,571
    Mentioned
    68 Post(s)
    Tagged
    1 Thread(s)
    I don't think 105 has 110 spacing. I have done this change two ways. 1. I'll start with a 110 spaced vintage double crankset and swap on chain rings from a MTB donor. I've got a 47/35 set up, or something close to it, on my 1986 Katakura. 2. My other builds use modern external bearing setups. One is a Shimano Tiagara I picked up off eBay. It's on my 1987 Prologue, currently 9 speed. I have a similar set up with a Truvativ Elita compact, it's on my 8 speed Paramount series 5.

    I really like compact setups, I'll pick up donor MTBs just to get the parts.

    While 110 spacing was popular on vintage doubles, not so much on the newer stuff. Too bad, as it limits changes.

  4. #4
    Senior Member
    Join Date
    Jul 2012
    Location
    N Fla.
    My Bikes
    new Trek3700,Experianced Raleigh500RT.
    Posts
    118
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The space between centers on the chainwheel bolts is 3"=(I believe) 129.616 or rounded off BCD 130.
    So far the few sprokets I've seen cost more together than compact cranksets.

  5. #5
    Senior Member
    Join Date
    Jul 2012
    Location
    N Fla.
    My Bikes
    new Trek3700,Experianced Raleigh500RT.
    Posts
    118
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    And of course I just found two on EvilBay that might fit the bill.LOL

    wrk101 have you had any problems with the spacing between the compact chainrings not meshing up with the existing chains or shifters. I didn't know you could foul up a friction shifter

  6. #6
    Senior Member BentLink's Avatar
    Join Date
    Jan 2010
    Location
    Pennsyl-tuckey
    My Bikes
    '86 Cannondale SR400, '86 Pugeot PX10, '92 Bianchi Axis, '95 Bianchi Campione d'Italia, '00 Fondriest X-Status, '08 Specialized Roubaix, '13 Cannondale CAADX
    Posts
    668
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I put a FSA Gossamer compact set on my old Cannondale. It's great!
    I'm more "Shrek" than "Schleck"

  7. #7
    Senior Member
    Join Date
    Jul 2012
    Location
    N Fla.
    My Bikes
    new Trek3700,Experianced Raleigh500RT.
    Posts
    118
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just found two on EBey that might work.
    Wrk101 Have you had any problems with spacing between the compact chainwheels and the old chain and shifters ?
    Dave.

  8. #8
    aka: Dr. Cannondale rccardr's Avatar
    Join Date
    Jul 2009
    My Bikes
    I'd rather not count how many, thank you
    Posts
    2,105
    Mentioned
    11 Post(s)
    Tagged
    0 Thread(s)
    +1 for the FSA unit. Truvativ also made some very nice compact doubles that used the same 115 square taper BB as your 105 stuff. Velo Orange makes a 110 BCD shiny crankset, square taper, takes a 110 BB, but it comes with a 48 big ring and as you have discovered, 50 tooth big rings can be pricey.

    130 BCD rings will get you to a 50/38 (what we call a 'kinda compact'), that's it.
    Hard at work in the Secret Underground Laboratory...

  9. #9
    DRF aka Thrifty Bill wrk101's Avatar
    Join Date
    Jan 2008
    Location
    The NC Mountains
    My Bikes
    Too many to list, all vintage
    Posts
    19,571
    Mentioned
    68 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by SlowNeasy View Post
    And of course I just found two on EvilBay that might fit the bill.LOL

    wrk101 have you had any problems with the spacing between the compact chainrings not meshing up with the existing chains or shifters. I didn't know you could foul up a friction shifter
    You can always run higher speed chain if you want (9 speed). When I have used modern cranksets, I tend to do it on 9 speed bikes. I am running 8 speed chain on one of them, nine on the other. There are various discussions on chain speed choice in the mechanics forum.

    And you can always run a vintage touring triple, and just remove the smallest ring.

  10. #10
    Senior Member AZORCH's Avatar
    Join Date
    Aug 2010
    Location
    Liberty, Missouri
    My Bikes
    1966 Paramount P-13 | 1971 Raleigh International | 1982 Gazelle AA Champion Mondial Special | 1980s Freschi Supreme Super Cromo | 1985 Katakura Silk | 1989 Waterford PDG Paramount | 2012 Boulder Brevet | 2014 Cycles Toussaint Velo Routier
    Posts
    2,511
    Mentioned
    3 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by wrk101 View Post
    And you can always run a vintage touring triple, and just remove the smallest ring.
    +1... just be aware that this will increase Q-factor due to the wider BB spindle. I suspect this only bothers me because I know it's wider.
    The Early Morning Cyclist: marksbikes.wordpress.com
    Life's too dang short to ride ugly bikes.

  11. #11
    Senior Member JAG410's Avatar
    Join Date
    Mar 2008
    Location
    Moorhead, MN
    My Bikes
    A few ;)
    Posts
    910
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I put the Velo Orange Grand Cru compact 48/34 crankset on my vintage bike, it looks like it belongs and it functions beautifully.

  12. #12
    Senior Member Chrome Molly's Avatar
    Join Date
    Jan 2012
    Location
    Minnesota
    My Bikes
    I lose count...
    Posts
    1,488
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    I settled on a cold forged sugino compact double 48/34 with 12/26 cassette, works well enough for most any climb. The advantage of the sugino is it uses a traditional bottom bracket, so you can fit the crankset based on the minimum width the frame will accept (with accurate measure of the needed BB width to match your frame). There are all sizes of square taper BB's available. That can't be said for external BB's or any of the proprietary systems.

    Still, I'm contemplating a 50/36/24 crank with a 13/24 cassette for the steepest climbs I encounter. Spinning vs mashing is most definitely the way to go.

  13. #13
    Gearhead old's'cool's Avatar
    Join Date
    Dec 2009
    Location
    Chicago SW burbs
    My Bikes
    2 many 2 fit here
    Posts
    3,007
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Don't overlook the option of a triple, either 130/74 or 110/74 BCD. My experience typically has been you can upgrade to a triple with no change to the BB or derailleurs (no guarantees - YMMV). If you get a 130/74 triple, you can re-use your existing chainrings, so it could be quite economical.
    Geoff
    "I think that I think, therefore I think that I am"

  14. #14
    Senior Member
    Join Date
    Oct 2010
    Posts
    197
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by AZORCH View Post
    +1... just be aware that this will increase Q-factor due to the wider BB spindle. I suspect this only bothers me because I know it's wider.
    I put a 94bcd LX crank on a 103mm bottom bracket. Q factor appears to be 150-155mm. I think that's alright but it feels too wide I guess still. Bike's getting a Stronglight 49d soon which is X amount narrower. Who knows.

  15. #15
    Climbing Fool terrymorse's Avatar
    Join Date
    Dec 2004
    Location
    Palo Alto, CA
    My Bikes
    Scott Addict R1, Felt Z1
    Posts
    3,019
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Um, do you know you can get wider range 7-speed cassettes than the 13-21 you now have? 11-28, 13-26, to name just two. Both Shimano HG50, maybe $30 each. You'll need a longer chain, too.

    Less expensive than new cranks.
    Managing Director, Undiscovered Country Tours

  16. #16
    It's MY mountain DiabloScott's Avatar
    Join Date
    Sep 2006
    Location
    Mt.Diablo
    Posts
    5,559
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by terrymorse View Post
    Um, do you know you can get wider range 7-speed cassettes than the 13-21 you now have? 11-28, 13-26, to name just two. Both Shimano HG50, maybe $30 each. You'll need a longer chain, too.

    Less expensive than new cranks.
    +1 A new crank is probably the most expensive way to go... especially a triple.

    Get a new RD and MTB cassette...

    http://diabloscott.blogspot.com/

  17. #17
    Senior Member
    Join Date
    Jul 2012
    Location
    N Fla.
    My Bikes
    new Trek3700,Experianced Raleigh500RT.
    Posts
    118
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by terrymorse View Post
    Um, do you know you can get wider range 7-speed cassettes than the 13-21 you now have? 11-28, 13-26, to name just two. Both Shimano HG50, maybe $30 each. You'll need a longer chain, too.

    Less expensive than new cranks.
    Thanks. That was my first idea, but I couldn't find one with a large enough grany gear w/o going to a new RD or so many duplicate/close gearings on a complicated pattern.
    I would be happy with a 5 speed 14-34 freeewheel but then new RD and change to a rear freewheel threaded wheel. But that's still a possibility.
    Dave.

  18. #18
    Senior Member
    Join Date
    Jul 2012
    Location
    N Fla.
    My Bikes
    new Trek3700,Experianced Raleigh500RT.
    Posts
    118
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by old's'cool View Post
    Don't overlook the option of a triple, either 130/74 or 110/74 BCD. My experience typically has been you can upgrade to a triple with no change to the BB or derailleurs (no guarantees - YMMV). If you get a 130/74 triple, you can re-use your existing chainrings, so it could be quite economical.
    Please forgive me I don't understand the 130/74. I the 130 the BCD? what is the 74 ?

  19. #19
    DRF aka Thrifty Bill wrk101's Avatar
    Join Date
    Jan 2008
    Location
    The NC Mountains
    My Bikes
    Too many to list, all vintage
    Posts
    19,571
    Mentioned
    68 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by AZORCH View Post
    +1... just be aware that this will increase Q-factor due to the wider BB spindle. I suspect this only bothers me because I know it's wider.
    Once the ring is removed, run a narrower bb.

    If you are going to run the vintage triple as a compact double, you need a 110/74. First number is for the middle and large ring, second number is the spacing for the small ring.

    Cost is really all about how resourceful you are. If you are just going to go to a bike shop, or order stuff new, then the freewheel is a much cheaper option. I tend to find used parts, often in the form of a complete bike. Takes more time and effort to get the parts, costs a lot less. Its that old time/cost balance.
    Last edited by wrk101; 02-10-13 at 06:39 AM.

  20. #20
    Senior Member RobbieTunes's Avatar
    Join Date
    Dec 2007
    Posts
    15,345
    Mentioned
    38 Post(s)
    Tagged
    2 Thread(s)
    Quote Originally Posted by JAG410 View Post
    I put the Velo Orange Grand Cru compact 48/34 crankset on my vintage bike, it looks like it belongs and it functions beautifully.
    I moved a guy from 53/39 DA 7400 to 48/34 V-O, and the chromed crankset fit right in, no problem. He's using his original DA bottom bracket. We moved the FD down just a hair, and took two links out of the chain.

    He wanted to "stay Dura Ace" and the triple option in that regard was nigh impossible and cost more than the bike, which is Italian threaded, making it even harder.

    Robbie ♪♫♪...☻

    I'm getting to the point where arrogance is a virtue....

    1982 Lotus Classique
    1986 De Rosa Professional SLX
    1987 D'Arienzo (Basso) SLX
    1995 Hot Tubes TT
    1998 Kestrel KM 40 Airfoil
    2006 Cinelli XLR8R-2
    2008 BMC Roadracer SL01
    2011 Eddy Merckx EMX3
    2014 Wraith Hustle

  21. #21
    Have bike, will travel Barrettscv's Avatar
    Join Date
    Feb 2006
    Location
    Windy City
    My Bikes
    A road bike for every purpose
    Posts
    9,216
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by SlowNeasy View Post
    Please forgive me I don't understand the 130/74. I the 130 the BCD? what is the 74 ?
    The 130BCD is only for the large and middle ring. This is a common standard for double cranksets. the 74BCD is only for the small chainring. The triple crankset has two BCD specifications.
    2014 Trek DS.1: "Viaggiatore" A do-it-all bike that is waiting in Italy
    2012 Pedal Force CG2: "Secolo Bicicletta" the modern carbon fiber road bike
    2012 Pedal Force CX2: "Carbone CX" the carbon fiber CX bike
    2010 Origin 8 CX 700: "Servizio Grave" Monstercross/29er bike
    1997 Simoncini Special Cyclocross: "Little Simon" lugged Columbus steel CX bike
    1987 Serotta Nova Special X: "Azzurri" The retro Columbus SPX steel road bike

  22. #22
    WNG
    WNG is offline
    Spin Forest! Spin! WNG's Avatar
    Join Date
    Sep 2007
    Location
    Arrid Zone-a
    My Bikes
    I used to have many. And I Will again.
    Posts
    5,959
    Mentioned
    35 Post(s)
    Tagged
    0 Thread(s)
    The OP's crankset is over-geared for his progressing years. 53/42 double... A cassette isn't the cheapest route as others have pointed out the need to buy a new RD. A 13-21t cassette with the right combo triple will yield a good low gear. I did this with a cross/hybrid w/ an Alivio 22-32-42 triple. I climbed steep hills comfortably.

    The 105 crankset is 130mm BCD, and should take a 113-115mm BB spindle. That's long enough for some modern triple cranks that use square-taper BBs.
    “You meet the nicest people on two wheels!"
    "Learn from yesterday, live for today, hope for tomorrow." ~Albert Einstein

  23. #23
    What??? Only 2 wheels? jimmuller's Avatar
    Join Date
    Apr 2010
    Location
    Boston-ish, MA
    My Bikes
    '73 Raleigh Carlton Gran Sport, '72 Peugeot UO-8, '82 Peugeot TH8, '87 Bianchi Brava, '76? Masi Grand Criterium, '72 Bertin C32, '87 Centurion Ironman Expert, '74 Motobecane Champion Team, and lots of uncertainty on some
    Posts
    7,449
    Mentioned
    41 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by WNG View Post
    The OP's crankset is over-geared for his progressing years. 53/42 double...
    No kidding. 53/13 would have been over-geared for me even in my early years! I never mused my n52/14 back then, surely don't need something like that in my "progressing" years.
    Real cyclists use toe clips.
    jimmuller

  24. #24
    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
    8,601
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by terrymorse View Post
    Um, do you know you can get wider range 7-speed cassettes than the 13-21 you now have? 11-28, 13-26, to name just two. Both Shimano HG50, maybe $30 each. You'll need a longer chain, too.

    Less expensive than new cranks.
    +1. A 13-26 cassette would help immensely without requiring any derailleur changes. A 39T inner chainring (also inexpensive) would also be a good idea.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  25. #25
    Senior Member
    Join Date
    Jul 2012
    Location
    N Fla.
    My Bikes
    new Trek3700,Experianced Raleigh500RT.
    Posts
    118
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by WNG View Post
    The OP's crankset is over-geared for his progressing years. 53/42 double... A cassette isn't the cheapest route as others have pointed out the need to buy a new RD. A 13-21t cassette with the right combo triple will yield a good low gear. I did this with a cross/hybrid w/ an Alivio 22-32-42 triple. I climbed steep hills comfortably.

    The 105 crankset is 130mm BCD, and should take a 113-115mm BB spindle. That's long enough for some modern triple cranks that use square-taper BBs.
    Everyone Thanks for the help

    WNG & Old's'cool (and anyone else) I found a Corso Pro, 52-42-30t, 130/74, crank set, says it fits sq taper 113-118mm(two sources) So this should fit right onto my 105 BB? If I need a wider FD no problem.
    Can you friction shift a triple ?
    Thanks all
    Dave.
    Last edited by SlowNeasy; 02-10-13 at 06:32 PM. Reason: omision

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
  •