155mmCranks

Discussion in 'Recumbent bicycles' started by Jim V., May 19, 2003.

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  1. Jim V.

    Jim V. Guest

    I'm looking for a place to get 155mm cranks for my Vision R50. The Hostel Shop doesn't carry them in
    stock and has to order them, unknown time to deliver. Any ideas? If they work out for me, I will
    probably switch to them on the Screamer also.

    Jim Vincent

    Vision R50 - RANS Screamer
     
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  2. I believe Legs Larry has stated that you may acquire shorter cranks via St.Johns Cycle in the U.K.,
    look under "Thorn" brand cranks.
    ---------------------
    "Jim V." <[email protected]> wrote in message news:[email protected]...
    > I'm looking for a place to get 155mm cranks for my Vision R50. The Hostel Shop doesn't carry them
    > in stock and has to order them, unknown time to deliver. Any ideas? If they work out for me, I
    > will probably switch to
    them
    > on the Screamer also.
    >
    >
    >
    > Jim Vincent
    >
    > Vision R50 - RANS Screamer
     
  3. "Jim V." <[email protected]> wrote in message news:<[email protected]>...
    > I'm looking for a place to get 155mm cranks for my Vision R50. The Hostel Shop doesn't carry them
    > in stock and has to order them, unknown time to deliver. Any ideas? If they work out for me, I
    > will probably switch to them on the Screamer also.
    >
    >
    >
    > Jim Vincent
    >
    > Vision R50 - RANS Screamer

    Hostel Shoppe < does> have those bolt-on crank arm shorteners I have them on my TT, and the highest
    gearing (less RPMs) is awesome after using lower and longer 'stock' crank arms for many years. Best
    addition I have found yet! Has 4 length adjustments. Why mess with the whole crank?

    Chris Jordan
     
  4. nodiak

    nodiak New Member

    Joined:
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    I had a local df frame builder redrill and tap my 175mm cranks to 152mm. Work great. A machine shop should be able to do the job, I've heard charges range from $30-60. This way you don't need to mess with a new bb and installation, saves $. But to leave enough metal around the new hole you probably shouldn't retap closer than 20mm difference to the original hole. So if your cranks are 175mm then 155mm would be possible. What type of cranks? Solid arms? Mine are Shimano hollowtechs, and there was enough non-hollow material to do them. Don
     
  5. Jfreewheel

    Jfreewheel Guest

    We carry the 155 arms good for a double ring setup in 110 ring pattern

    J Gaerlan - Gaerlan Custom Cycles http://www.gaerlan.com Framebuilding,Recumbent and Bike
    Parts eStore
    (415)362-3866: (415)677-8943 fax [email protected]
     
  6. I saw some of these on E-bay today.

    Have you checked there?

    Lewis.

    ........................

    "Jim V." <[email protected]> wrote in message news:<[email protected]>...
    > I'm looking for a place to get 155mm cranks for my Vision R50. The Hostel Shop doesn't carry them
    > in stock and has to order them, unknown time to deliver. Any ideas? If they work out for me, I
    > will probably switch to them on the Screamer also.
    >
    >
    >
    > Jim Vincent
    >
    > Vision R50 - RANS Screamer
     
  7. Jim V.

    Jim V. Guest

    I'll give the shorteners a look. I was really hoping to have a triple ring set-up. I don't do hills
    well, and I could really use a "granny". I think drilling will be my last resort.

    Thanks, Jim Vincent Vision R50 - RANS Screamer
     
  8. Geob

    Geob Guest

    Do a search on a.r.b.r., several sources have been cited.

    I am using some BMX cranks by Redline. 155mm. I am about to talk to a machinist about drilling
    and tapping it for my granny chain ring, as it has only two on there. I paid $25 total for mine
    from eBay.

    I wouldn't go back. The shorter crank made a dramatic positive difference for me.

    GeoB
     
  9. Steve

    Steve Guest

    Chris, I'm looking at getting some of these but was wondering how they fit on a set of Ultegra
    cranks? I saw they have 2 sizes and I haven't measured my cranks yet. Is there a secure mount to the
    cranks so you don't get any play in the adapters?

    Steve
     
  10. Mark Stonich

    Mark Stonich Guest

    [email protected] (GeoB) wrote in message news:<[email protected]>...
    > I am using some BMX cranks by Redline. 155mm.

    I've been curious about those. Is there room between the spider and the crank arm to use 2
    chainrings and a derailleur? I like a low Q factor, which is the weak point on the Doteks.

    > I am about to talk to a machinist about drilling and tapping it for my granny chain ring, as it
    > has only two on there.

    If that doesn't work out, contact me. I just had a machinist CNC me a drilling plate, with 58, 74
    and 110 BCD bolt circles and a center hole for a BB spindle. I made an adaptor last night, which
    worked out perfectly. See http://bikesmithdesign.com/fittings/DrillGuide.jpg

    I'll be doing some crank arms next week. If they work out well, I may buy a batch of Doteks and
    re-sell them as triples. BTW the 1st box of Doteks that QBP sold as BMX cranks accidentally came
    drilled as triples.

    > I paid $25 total for mine from eBay.

    Very good deal!

    > I wouldn't go back. The shorter crank made a dramatic positive difference for me.

    Same here, I don't know of anyone who has gone back.
     
  11. [email protected] (Steve) wrote in message
    news:<[email protected]>...
    > Chris, I'm looking at getting some of these but was wondering how they fit on a set of
    > Ultegra cranks?

    I am not positive, but they (Tandem East) fit very tightly on my squarish shaped Deores (or whatever
    they are on WizWheelz!!); they have ears and do not move at all. The shorteners were under $100., so
    when I ordered I had no idea what they would fit on.

    I saw they have 2 sizes and I haven't
    > measured my cranks yet.

    I just had a very lucky guess!

    Is there a secure mount to the cranks so you
    > don't get any play in the adapters?

    Very secure and large allen-bolt- same size as the pedals that has a secure lip molded in. No play
    at all in mine- and I overpower an electric motor; I am very hard on the chain; the chain is giving
    way first and not the shortener.

    Chris J.

    > Steve
     
  12. Geob

    Geob Guest

    > > I am using some BMX cranks by Redline. 155mm.

    Mark Stonich:
    > I've been curious about those. Is there room between the spider and the crank arm to use 2
    > chainrings and a derailleur?

    I *am* using two chainrings and a derailleur. I took my non-stock triple off to put this on, and
    simply adjusted the deraileur to fit.

    This is geared taller than my triple, I may eventually choose to get my C'dale Coda BMX cranks
    re-drilled (170mm 44,34,22), if I could find somebody that would get the alignment straight. I been
    burned so often I don't trust Mother Theresa. Maybe I should get the shorteners.

    > I like a low Q factor, which is the weak point on the Doteks.

    Is this the distance between the cranks? Isn't that a function of the BB? Forgive my
    ignorance please.

    > > I am about to talk to a machinist about drilling and tapping it for my granny chain ring, as it
    > > has only two on there.
    > If that doesn't work out, contact me.

    Are you interested in drilling my spider for me? I'd like that. Where are you? Is that what your new
    plate is for?

    > I'll be doing some crank arms next week.

    Drilling them for the triple, the granny gear?

    Thanks GeoB
     
  13. Jim Vincent

    Jim Vincent Guest

    My LBS, after much looking, found a supplier of the 155mm cranks. They are supposed to be available
    in about 2-3 weeks for shipping. Also, they are good for triple chainrings and also supposed to have
    130 holes. I ordered the shorteners and are giving them a try first, to see if it helps as much as I
    hope. I'm a short guy, only 5'5", with a 38" X-seam. The 170's on my Vision and the 175's on the
    Screamer were giving me sore knees on rides where it was hilly and I couldn't keep my RPM's up.

    Jim Vincent Vision R50 - RANS Screamer
     
  14. Mark Stonich

    Mark Stonich Guest

    [email protected] (GeoB) wrote in message
    > This is geared taller than my triple, I may eventually choose to get my C'dale Coda BMX cranks
    > re-drilled (170mm 44,34,22), if I could find somebody that would get the alignment straight.

    That shouldn't be a problem, if there is enough material. I've been told that 175s have to be
    shortened to 152, to leave enough material past the eye, so I assume 170s will have to go to 147.

    > I been burned so often I don't trust Mother Theresa. Maybe I should get the shorteners.

    I wouldn't. I find having the pedals too far apart to be more annoying with short cranks.
    >
    > > I like a low Q factor, which is the weak point on the Doteks.
    >
    > Is this the distance between the cranks? Isn't that a function of the BB? Forgive my
    > ignorance please.

    "Q Factor" determines the distance between the pedals. The Dotek arms angle outward from the BB to
    the pedal eyes. Great if you have an ankle to crank arm clearance problem, but most people don't.

    > Are you interested in drilling my spider for me? I'd like that.

    I should be able to take care of you, but I want to do a few other cranks first.

    A) I doubt there is any way to screw this up. But in case there is, I want to find out on my cranks,
    not yours.

    B) At this point I don't know how long it will take, so I can't quote a price. The drilling won't
    take long, but ensuring that the tap is aligned perfectly might. I may buy a tapping machine,
    which whould also be good for tapping new pedal eyes accurately.

    > Where are you?

    Minneapolis MN

    > Is that what your new plate is for?

    Yes.

    > > I'll be doing some crank arms next week.
    > Drilling them for the triple, the granny gear?

    Yes, but I may not get to it this week after all. We are moving my father-in-law into an assisted
    living facility next weekend, and it's getting complicated.
     
  15. Rorschandt

    Rorschandt Guest

    [email protected] (Mark Stonich) wrote in
    news:[email protected]:

    >
    > B) At this point I don't know how long it will take, so I can't quote a price. The drilling won't
    > take long, but ensuring that the tap is aligned perfectly might. I may buy a tapping machine,
    > which whould also be good for tapping new pedal eyes accurately.
    >
    >

    In case you haven't seen these:
    http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=46343 is for a drill press. I
    haven't used this particular unit, but similar.
    http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=46502 is a manual machine with no
    electricty. I have considered the latter, but considering that I generally tap the ends of round
    stuff, I probably will just invest in a larger lathe. I would not recommend their taps.

    -rorschandt- <A HREF="mailto:p[email protected][127.0.0.1]">

    --
    <A HREF="mailto:p[email protected][127.0.0.1]"
     
  16. Mark Stonich

    Mark Stonich Guest

    rorschandt <[email protected]> wrote in message
    > > B) At this point I don't know how long it will take, so I can't quote a price. The drilling
    > > won't take long, but ensuring that the tap is aligned perfectly might. I may buy a tapping
    > > machine, which whould also be good for tapping new pedal eyes accurately.
    >
    > In case you haven't seen these:
    > http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=46343 is for a drill press. I
    > haven't used this particular unit, but similar.
    > http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=46502 is a manual machine with no
    > electricty.

    I just ordered a large manual tapper from http://www.mscdirect.com Part # LA09491002 It is similar
    in principal to the manual Harbor Freight one, but much more heavy duty, weighing 50 lbs and with a
    capacity of 5/8" instead of 5/16". It's on sale this month for $109 instead of the usual $234.
     
  17. Review Boy

    Review Boy Guest

    Are you using the Hase or Tandems East shorteners?

    thanks

    "Christopher Jordan" <[email protected]> wrote in message
    news:[email protected]...
    > Hostel Shoppe < does> have those bolt-on crank arm shorteners I have them on my TT, and the
    > highest gearing (less RPMs) is awesome after using lower and longer 'stock' crank arms for many
    > years. Best addition I have found yet! Has 4 length adjustments. Why mess with the whole crank?
    >
    > Chris Jordan
     
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