Mountain Bikes · Public discussion

riser bars/stem angle??

Started by Alan McClure · · Last activity · 10 posts · 982 views

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Mountain Bikes
Published
11 July 2003
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14 July 2003
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Alan McClure
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  1. This may be a simple/stupid question, but what the hell difference is there between having a riser
    bar and a stem that has more of an inclined angle to raise a flat bar up? It doesn't seem to me,
    that there would be any difference, but I'm sure I'm wrong, or why would riser bars even exist.
    Don't tell me it is a style thing.

    Alan McClure

  2. Alan McClure said:

    Don't tell me it is a style thing.

    But riser bars do have a better angle and layback than a flat bar, crazy angle stem combo.

    --
    Matt

    Fear of a flat planet

  3. "Alan McClure" <[email hidden]> wrote in message news:qKCPa.36069$Ph3.2985@sccrnsc04...

    Quoted message said:

    This may be a simple/stupid question, but what the hell difference is there between having a riser
    bar and a stem that


    has

    Quoted message said:

    more of an inclined angle to raise a flat bar up? It doesn't seem to me, that there would be any
    difference, but I'm sure I'm wrong, or why would riser bars even exist. Don't tell me it is a
    style thing.

    Alan McClure

    Fair question, and probably there is very little difference, but in general, it seems that risers
    are a little wider than mot flat bars and they also bend back a bit. Personally, I like the
    increased width of my risers and since I ride very few trails with close trees, I don't miss shorter
    flat bars.

    Also, with risers, you can rotate them front or back, thus changing the reach a bit as well. In
    small, subtle ways, it seems to me that risers give you a little more adjustability than flats w/ a
    higher stem. YMMV.

    --
    Craig Brossman, Durango Colorado (remove .nospam. if replying)

  4. "Alan McClure" <[email hidden]> wrote in message news:qKCPa.36069$Ph3.2985@sccrnsc04...

    Quoted message said:

    This may be a simple/stupid question, but what the hell difference is there between having a riser
    bar and a stem that


    has

    Quoted message said:

    more of an inclined angle to raise a flat bar up? It doesn't seem to me, that there would be any
    difference, but I'm sure I'm wrong, or why would riser bars even exist. Don't tell me it is a
    style thing.

    Alan McClure


    Your totally right there, there's abolutely no difference between the two. Nowadays both flat- and
    riserbars are available in 3,5,6,7,9,11 etc. degrees bend and in all widths. BTW ever heard of the
    syntace VRO system?? www.syntace.com IMHO the the best and even better of both worlds,

    Mars

  5. Quoted message said:

    But riser bars do have a better angle and layback than a flat bar, crazy angle stem combo.

    You almost never see any flat bars with an angle greater than 5 degrees, while risers have more
    motorcycle-like bends.

    --
    Phil, Squid-in-Training

  6. Craig Brossman said:

    "Alan McClure" <[email hidden]> wrote

    Quoted message said:
    Quoted message said:

    This may be a simple/stupid question, but what the hell difference is there between having a
    riser bar and a stem that


    has

    Quoted message said:

    more of an inclined angle to raise a flat bar up? It doesn't seem to me, that there would be any
    difference, but I'm sure I'm wrong, or why would riser bars even exist. Don't tell me it is a
    style thing.

    Quoted message said:

    Fair question, and probably there is very little difference, but in general, it seems that risers
    are a little wider than mot flat bars and they also bend back a bit. Personally, I like the
    increased width of my risers and since I ride very few trails with close trees, I don't miss
    shorter flat bars.

    I've done both - I used to ride very narrow, tree-lined trails and ended up cutting an inch off each
    end of my (already narrow) straight bars. That isn't what I'd do now that I ride in wide-open
    Arizona (trees? What are trees?).

    Quoted message said:

    Also, with risers, you can rotate them front or back, thus changing the reach a bit as well. In
    small, subtle ways, it seems to me that risers give you a little more adjustability than flats w/ a
    higher stem. YMMV.

    Craig got it dead on. If you have a flat bar and riser with the same sweep and the same width,
    there would be no difference at all (other than the fact the flat bar/riser stem combo would weigh
    less). Heh.

    Mark Hickey Habanero Cycles habcycles.comhabcycles.com Home of the $695 ti frame

  7. Phil said:
    Quoted message said:

    But riser bars do have a better angle and layback than a flat bar, crazy angle stem combo.

    You almost never see any flat bars with an angle greater than 5 degrees, while risers have more
    motorcycle-like bends.

    True for most of 'em sold - but the others are out there...

    9 degree - Titec Flat-Tracker (640mm width) 11 degree - Salsa Pro Moto (660mm width) 15 degree -
    Kalloy Flat Bar (560mm) 15 degree - Surly Torsion Bar (620mm)

    With a combination of one of the above and a riser stem, you should pretty much be able to replicate
    almost any riser bar / normal stem combination.

    Mark Hickey Habanero Cycles habcycles.comhabcycles.com Home of the $695 ti frame

  8. Alan McClure said...

    Quoted message said:

    This may be a simple/stupid question, but what the hell difference is there between having a riser
    bar and a stem that has more of an inclined angle to raise a flat bar up? It doesn't seem to me,
    that there would be any difference, but I'm sure I'm wrong, or why would riser bars even exist.
    Don't tell me it is a style thing.

    Alan McClure

    I think it started because with a riser you can add a support across the bend so that you get a bar
    with much more strength and rigidity, although you don't see that support much anymore. Also don't
    forget that with a riser bar you can change the tilt and get different riding positions. If you go
    the flat bar + riser stem route you should remember that the rise takes away from the effective
    length of the stem. It's easy to figure out the effective length:

    effective length = cos(angle)*length

    So if you have a 110mm stem, a 25 degree angle will effectively make it a 100mm stem.

    You can also figure out how much rise you will get with a riser stem:

    rise = sin(angle)*length

    Unfortunately, there aren't that many stems available with a big angle.

  9. Super Slinky said:

    If you go the flat bar + riser stem route you should remember that the rise takes away from the
    effective length of the stem. It's easy to figure out the effective length:

    effective length = cos(angle)*length

    So if you have a 110mm stem, a 25 degree angle will effectively make it a 100mm stem.

    You can also figure out how much rise you will get with a riser stem:

    rise = sin(angle)*length

    Or if you're lazy, you can go to:

    habcycles.comfitting.html

    Mark Hickey Habanero Cycles habcycles.comhabcycles.com Home of the $695 ti frame

  10. Mark Hickey said...

    Quoted message said:

    Or if you're lazy, you can go to:

    habcycles.comfitting.html

    Cool.

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