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  1. #1
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    Help with sizing specialized sirrus I'm 5'9"

    Hi everyone, I've been browsing the web trying to find a reasonable answer to this question and found lots of similar ones on here but nothing that answers it 100% so I thought this the best place to ask!

    Anyhow, I'm 32 and recently started cycling again to get fit and for a bit of fun, I'm 5'9" tall with a short leg. Currently I have a Giant Sedona small frame size that I had fitted by a local bike shop a few years ago and it's too small, I did say to them at the time it felt too small but they assured me that they were certain that was my size, I now realise they were trying to dump stock on me.

    Because of this I've been considering getting a newer bike or something that fits better and I've been looking at things like Specialized Sirrus models, I've now got an opportunity to possibly get a second-hand sirrus that is a couple of years old *but* it sized as an L which checking out the sizing guides is suggested for people 5'9" and taller and the medium is sized for people up to 5'9" so I'm right in the middle of the crossover.

    My question is... will a size L likely be too big for me? I know that If I got a M size then it'd be an improvement on what I have now. Even so if I do get the L and it's too big I could always sell it on and start looking for an M or I might even splash out on a new one in which case I'd be 100% certain I got the right size!

    I just don't really trust any of the bike shops around here due to the previous experience and as they all seem to have a bit of a snobbish attitude when I've asked newbie questions of them before and most of them don't really have much of a range to try out and want to push you towards what is in stock which after my previous experience really puts me off!

    Any advice appreciated!

  2. #2
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    I tend to believe somewhat larger is much better than too small. If you Google "bicycle sizing" you will come up with several sizing charts but you need your actual inseam measurement. I still think the recomendations run on the small side. For example, my GF is 5' 9" with a 31" inseam. According to the size charts she would take a 17.5" frame. However a 19" fits her perfect. Actually we keep raising the seat post little by little so I'm glad we didn't go any smaller. I have a Cypress which is the same frame as your Sedona in 19" and she has ridden it also. I should mention that both our hybrids have sloping top tubes so the standover isn't a problem.

    Beware of the S M L sizing. My 19" Giant says Large where her Raleigh 19" says Medium. I think it best to go with the actual measurement taken from bottom bracket center to top of seat post.

    The LBS sold us a used 14" mountain bike for her originally. It was absolutely killing her on the trail. The shop is a nice bunch of guys but I don't know what the salesman was thinking that day. They offered to put it on the floor and sell it for us. Nothing worse than a bike that doesn't fit.

  3. #3
    aka Phil Jungels Wanderer's Avatar
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    I also like larger bikes - if need be, you can downsize it with a shorter stem. And the slope of the tube on a Sirrus should also leave you enough seat tube to make plenty of adjustments.

    I much prefer the more stretched out comfort of a larger (than they suggest) bike frame. It's almost always easier to make it smaller, but harder to make it bigger. the difference in a 56-58-61 cm tope tube is only about an 3/4 to 1 inch between sizes.

    "Retirement is the best job I ever had!" Me, 2009


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  4. #4
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    i have a feeling that the large size is too big for you.

    fit really depends on riding style and what you feel is comfort able.

    (1) riding style - racer's prefer low handlebars & long stems so they can stretch out low ; casual - higher handlebars and enjoy the view. (2) comfort - flexibility is one thing to consider. another is if you're hands hurt you may like the seat back to put more weight on your rear and less on the hands.

    truth is, only you can know if its appropriate or not. if specialized is giving specs like i understand, then a SO of 824 mm is really high! i'm going by 2010 specs even though your bike is a bit older. i usually don't worry too much about SO but I like to keep it within reason. I'm 5'9 with average proportions and 824 mm would leave me no room to lift the bike when i straddle over it. i know top tube length is what counts but SO should be given some consideration

    i'm comfortable with a bike that has a top tube length ~55cm and a SO of 74-75.4 cm. i like my handlebars high and i don't race or commute. but that's just me. you could feel differently. make sure that the stem does not have a radical rise or is not ridiculously short.

    i know people don't care too much for standover but it's a good rough, sloppy 5-second test. straddle over the bike. lift it as high as you can until it presses against your pubic bone with the same amount of pressure as you feel when you're on the saddle. your tires should be at least 2" above the ground. if it's lower than use your discretion and preference.

    btw - i think it's ridiculous that 5'9" like us (average height in the US for men) don't have an easier time with sizing. you'd think they have a size specially centered for this group and then have the next size with is for 6'1 or 5'4
    Last edited by common man; 05-16-10 at 08:05 AM.

  5. #5
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    FWIW, I just (yesterday) purchased a 2010 Sirrus Comp. A few thoughts. I'm just a touch over 5'8", but with relatively long legs/arms and shortish torso. So fitting's always been a problem for me. I went with the Medium -- fits like a glove

    Although I'm more concerned with t/t length as a rule, standover is important. Assuming that the L you're looking at is an 07 or 08, I do think it very likely that although the t/t will be fine for you standover is going to be pretty tight. OTOH, a M from those years has a relatively short t/t.

    Specialized has changed this (I think beginning 09) -- the M now has an effective t/t of 565mm (previously 545, both with 74 degree seat angles), which was the t/t on the 07/08 Large.
    So, if you like the Sirrus line I would strongly suggest looking at the Medium in the newer series; ymmv but I do think you'd find them a much better fit than the Large (or a Medium for that matter) from earlier years.

    P.S. A wonderful bike, I think (but then I would, wouldn't I!). Since taking up riding again back in 02 I've stuck with various roadified mtbs, having never until now found a more genuinely road-oriented bike on which I felt really, really comfortable/relaxed/efficient. Marketing hype aside, whatever Specialized has done with the Sirrus (at least the top models with carbon rear triangles) it works for me and my arthritic spine.
    Last edited by badger1; 05-16-10 at 10:51 AM.

  6. #6
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    I'm 5'8" or so, and I have a 54cm 2009 Sirrus. Fits great, perfect ride (IMO). I also had a 54cm Allez from 2006-2008 that fit decent as well, though drop bars were just not my style.

    I think the 54cm is a M, I dont know I want a number, not a size when it comes to bikes.

    And, I feel for ya on the bad bike shop. I have a great one about 45 minutes from me (by car) that is great...girlfriend and I stopped there today on our 22 mile round trip bike ride They have always taken great care of us, and will answer any question we can throw at them

  7. #7
    Specialized Secteur Sport EDDIE1963's Avatar
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    I purchased a new Sirrus a week ago. I used to ride large frame bikes. I am 5' 9" and a medium is perfect in the Specialized Sirrus for you height..

  8. #8
    aka Phil Jungels Wanderer's Avatar
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    According to Specialized spec sheet, a M would be a 56, and a L would be a 58.

    "Retirement is the best job I ever had!" Me, 2009


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  9. #9
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    Ok, thanks with all the comments, I think if I can get this bike cheap enough then I'll go for it. Try it out and sell it on if it's no good (or sell on the old bike first if this is better) and then keep saving up for a new Sirrus or similar and then I will at least know my size.

  10. #10
    aka Phil Jungels Wanderer's Avatar
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    Make sure you report back, with your findings, and opinions.

    "Retirement is the best job I ever had!" Me, 2009


    Specialized Crosstrail Sport - '08
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    Marin Stinson - misappropriated by my youngest grandson - '01
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  11. #11
    Senior Member Loose Chain's Avatar
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    I prefer bikes to the smaller side of my fit range. For a person of your height and with "short" legs per your OP then I would think a Medium would be correct, my guess.

  12. #12
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    Ho hum,

    After all that the guy selling the bike decided that he wasn't going to sell any more so I never got a chance to go and test it. I'll just have to keep looking...

  13. #13
    aka Phil Jungels Wanderer's Avatar
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    While you are waiting, visit some LBS, and ride the different bikes, and sizes. That way you will have a better idea of what you want, and what fits.

    Wo knows? You may end up with a bike from a LBS, later on.

    But, your experimenting will give you lots of ideas. And better prepare you for the used markets. Both bike styles, and sizes.

    You may even end up with a new bike now ----- LOL

    "Retirement is the best job I ever had!" Me, 2009


    Specialized Crosstrail Sport - '08
    Nishiki Sport - misappropriated from my youngest son (circa 1984)
    Marin Stinson - misappropriated by my youngest grandson - '01
    "The Beast" - 1990 Schwinn Airdyne (in the basement for winter torture)

  14. #14
    Senior Member Norboo's Avatar
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    Hate to be a wet blanket, but that bike is going to be big for you. I recently sold my 19.5 Police bike because I felt too stretched and wasn’t easy on my back. I tested few specialized bikes and I’m in between size M to L. According to Specialized, I should be easy L but in reality, M is little small and L is little big. I am 5’11”, inseam 30/31, avg reach.

  15. #15
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    ^^^ i use the "size" as a starting point for a rough idea. but you should go by the actual geometry (like top tube length & standover) because manufactures among themselves and within themselves have a lot of variety for the same sizes. my model had a 55.5 cm TT in 2009 for the 19" but in 20010 the 17" model had a 55.5 cm TT. so a L or an M or 19.5 or 17.5 are not absolutes. but i do agree with you...I'm 5'9 myself and L seems way too big going by the geometry.

  16. #16
    Senior Member albanian's Avatar
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    You will probably fit a medium better than a large. I have a large and I am almost 6'. You could certainly ride a large with no problems so if after checking out the med and the lg, you are still not sure, get the large. A larger bike will be more comfortable than a bike that is too small.

    A quick easy way I can tell if a bike is too small for me is if I feel like I am sliding off the back of the seat when I peddle.

    I have a feeling that since you have short legs, a medium would probably be a better fit but I don't think a large would be too big for you to ride either. You are blessed (or cursed) by being in between a med and a lg in most bikes. That means that you can ride both and probably be okay. When in doubt, go larger. A larger bike is still ridable while a bike that is too small is cramped and less safe.
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