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  1. #1
    Senior Member mrblue's Avatar
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    Parallax Fit Question

    I am considering getting a Cinelli Parallax (2015 - black version).

    According to the geometry chart on the MASH SF website I sort of fall in between sizes. If I go with a 52 the effective top tube length (51.5) will be good, but the stand-over (77.1) will be a bit higher than what I am comfortable with. However, if I go with a 50 the stand-over will be good (75.6), but the effective top tube length (49.1) will be a bit too short. At the moment I am riding a Cinelli Vigorelli, size 50, with a 90mm stem, and all is good (ETT: 52; SO: 76). One thought I had was to go with the size 50 Parallax and use a slightly longer stem (100-110mm) than what is on my Vigorelli.

    Any input on this?

    Thanks.

    Mash_Parallax_54102245b9469_grande.jpg

  2. #2
    pro in someone's theory prooftheory's Avatar
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    Standover height means nothing when it comes to fit. Also, post your fit calculator results.

  3. #3
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by mrblue View Post
    I am considering getting a Cinelli Parallax (2015 - black version).

    According to the geometry chart on the MASH SF website I sort of fall in between sizes. If I go with a 52 the effective top tube length (51.5) will be good, but the stand-over (77.1) will be a bit higher than what I am comfortable with. However, if I go with a 50 the stand-over will be good (75.6), but the effective top tube length (49.1) will be a bit too short. At the moment I am riding a Cinelli Vigorelli, size 50, with a 90mm stem, and all is good (ETT: 52; SO: 76). One thought I had was to go with the size 50 Parallax and use a slightly longer stem (100-110mm) than what is on my Vigorelli.

    Any input on this?

    Thanks.

    Mash_Parallax_54102245b9469_grande.jpg
    That is often the problem with pursuit style frames, and you just need to htfu, get the proper top tube length and learn to mount and dismount your bike w/o mashing your junk. If I had to worry about standover on my bikes, more than half of them would be unrideable.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  4. #4
    Senior Member mrblue's Avatar
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    Quote Originally Posted by TejanoTrackie View Post
    That is often the problem with pursuit style frames, and you just need to htfu, get the proper top tube length and learn to mount and dismount your bike w/o mashing your junk. If I had to worry about standover on my bikes, more than half of them would be unrideable.
    Thanks. That does help.

  5. #5
    Senior Member mrblue's Avatar
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    Quote Originally Posted by TejanoTrackie View Post
    That is often the problem with pursuit style frames...
    Excuse me if I sound ignorant, but I hear that term a lot: "pursuit style." What exactly is "pursuit style?" And what does it mean? Thanks.

  6. #6
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by mrblue View Post
    Excuse me if I sound ignorant, but I hear that term a lot: "pursuit style." What exactly is "pursuit style?" And what does it mean? Thanks.
    It's a frame with a short forward sloping top tube that places the rider in an aero racing position with a lot of saddle to bar drop. If you look in the bike porn thread you will see a lot of these. The term pursuit refers to a type of track time trial race.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  7. #7
    Senior Member mrblue's Avatar
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    Quote Originally Posted by TejanoTrackie View Post
    It's a frame with a short forward sloping top tube...
    Thanks. By that definition, then, I wouldn't consider the Parallax a "pursuit style." On the other hand the Histogram would be. Correct?

    Aside from that, however, your suggestion about focusing on the effective top tube length, as opposed to stand-over height, I concur, is a better way to determine frame size. Yup, I need to HTFU

    histogram.jpgparallax.jpg
    Last edited by mrblue; 04-22-15 at 10:51 AM.

  8. #8
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by mrblue View Post
    Thanks. By that definition, then, I wouldn't consider the Parallax a "pursuit style." On the other hand the Histogram would be. Correct?

    Aside from that, however, your suggestion about focusing on the effective top tube length, as opposed to stand-over height, is a better way to determine frame size.
    Yeah, sorry, I wasn't paying attention and thought it was one of the Cinelli pursuit style frames. It does, however, seem to have an unusually short top tube for a given seat tube length, which is why I just assumed it was a pursuit style frame.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  9. #9
    Senior Member mrblue's Avatar
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    Quote Originally Posted by TejanoTrackie View Post
    It does, however, seem to have an unusually short top tube for a given seat tube length, which is why I just assumed it was a pursuit style frame.
    So, having said that, does your suggestion of focusing on the TT length, over the stand-over height, still apply to non "pursuit style" frames, in general?

  10. #10
    pro in someone's theory prooftheory's Avatar
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    Quote Originally Posted by mrblue View Post
    So, having said that, does your suggestion of focusing on the TT length, over the stand-over height, still apply to non "pursuit style" frames, in general?
    It always applies. Standover height never matters, unless your goal is to spend a lot of time standing with both feet on the ground while straddling your bike.

  11. #11
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by mrblue View Post
    So, having said that, does your suggestion of focusing on the TT length, over the stand-over height, still apply to non "pursuit style" frames, in general?
    Absolutely ! To me, this is a universal principle of bike fit.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  12. #12
    Senior Member mrblue's Avatar
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    Quote Originally Posted by prooftheory View Post
    It always applies. Standover height never matters, unless your goal is to spend a lot of time standing with both feet on the ground while straddling your bike.
    I agree. That makes total sense. So, then, why is it many bike shops ask a customer to stand over a bike and check how much clearance they have between the TT and their junk, in order to determine fit?

  13. #13
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by mrblue View Post
    I agree. That makes total sense. So, then, why is it many bike shops ask a customer to stand over a bike and check how much clearance they have between the TT and their junk, in order to determine fit?
    Because they are ignorant idiots.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  14. #14
    pro in someone's theory prooftheory's Avatar
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    I'd also guess that it may be the best method for fitting bikes for kids. For kids balancing a bike that is somewhat high may be a challenge and their height is going be changing rapidly so getting the "right" top tube length will be a fools errand anyway so the bike shops go with the largest bike that is easily balance rather than the one that fits the best ... then they ignorantly assume that the same principle applies to adults. ugh.

  15. #15
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by prooftheory View Post
    I'd also guess that it may be the best method for fitting bikes for kids. For kids balancing a bike that is somewhat high may be a challenge and their height is going be changing rapidly so getting the "right" top tube length will be a fools errand anyway so the bike shops go with the largest bike that is easily balance rather than the one that fits the best ... then they ignorantly assume that the same principle applies to adults. ugh.
    It depends on the shop. My shop is totally pro, and uses a fit machine. They also tweak the bikes they sell with different stem lengths and bar dimensions. Of course, 90% of the bikes they sell cost over a grand, so their clientele is not the food stamps crowd.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  16. #16
    A Schooner IS a sailboat Wspsux's Avatar
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    Quote Originally Posted by TejanoTrackie View Post
    Because they are ignorant idiots.
    This.

    A very trendy popular shop with subpar customer service which will remained unnamed in SOHO NYC JUST SOUTH OF REI tried to sell my (ignorant) friend a 52 based solely on standover. I went on a test ride with him and could tell the top tube was clearly too short. Happily I was there to suggest a 56, which fit better. However we've decided a size 54 from a different manufacturer would be best.

  17. #17
    Senior Member GromCake's Avatar
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    a lot of shops just don't bother trying to actually fit most of their clientele because most of their clientele is going to ride very casually, and usually a fit at a shop costs more than a casual rider wants to pay. in this case standover works well enough cause the client likely won't be riding the bike enough for fit to matter all that much. as long as the person feels comfortable enough on the test ride, it'll work. those of us who ride more often and have been for years usually know our own fit, or will ask the shop for a proper fit, body measurements and all that jazz. sometimes the shop is just run by idiots. but my trusty lbs (all very skilled knowledgeable mechanics) uses standover for normies and proper fit if you ask for it. their clientele is pretty much divided between casual riders that want a bike to ride to class and serious riders that already know the size of bike they need. most of the in-between go to the other shops cause the other shops have done fancy expensive remodels and the intermediate folks think that means it's a good shop.
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