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Old 06-30-06, 06:08 PM   #1
buttfish77
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any 6 footers riding a 57cm frame?

I bought a 57cm Sirrus sport, and I'm 6' tall. It feels a little smalle to me, but the guy at the LBS told me that the next size up, 61cm, is only for giants.
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Old 06-30-06, 06:38 PM   #2
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You'd think the next size up would be a 59. It is for some makes of bikes but maybe Sirrus does not have that size. If not, my guess is their 61 is not measured c-to-c, in which case, it's not all that big--definitely not for giants. Looking at some other bikes, for example, a 61 Bianchi or Trek is no bigger than a 59 Lemond wheras a 63 Bianchi or Trek is equal to a 61 Lemond.

P.S., I just checked out the geometry on Specialized's website and they sure make it hard to know what's going on there. They're not giving you what the measurement would be assuming the top bar was horizontal. Even so, the headtube lengths on your brand does seem big, e.g., about 40 mm longer for your 58 than for my 61c Lemond and 63c Trek. It must be a bike that is made for more upright riding. Even your wheelbase is longer (y just a little) so I'd you probably do have the right size frame. If you feel too scrunched, maybe you just need a longer stem.

Last edited by wagathon; 06-30-06 at 07:11 PM.
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Old 06-30-06, 09:49 PM   #3
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Quote:
Originally Posted by wagathon
You'd think the next size up would be a 59. It is for some makes of bikes but maybe Sirrus does not have that size. If not, my guess is their 61 is not measured c-to-c, in which case, it's not all that big--definitely not for giants. Looking at some other bikes, for example, a 61 Bianchi or Trek is no bigger than a 59 Lemond wheras a 63 Bianchi or Trek is equal to a 61 Lemond.

P.S., I just checked out the geometry on Specialized's website and they sure make it hard to know what's going on there. They're not giving you what the measurement would be assuming the top bar was horizontal. Even so, the headtube lengths on your brand does seem big, e.g., about 40 mm longer for your 58 than for my 61c Lemond and 63c Trek. It must be a bike that is made for more upright riding. Even your wheelbase is longer (y just a little) so I'd you probably do have the right size frame. If you feel too scrunched, maybe you just need a longer stem.
Thanks! I guess my only gripe is that the saddle needs to be slid all the way back in its track in order for my knee to be properly positioned over the pedal at 3:00 o'clock. The seat tube is definately not 57cm (more like 51cm) but I think they measure it as though the top tube were horizontal. It's a hybrid bike, so it has a little bit of an upright riding position, but it's less upright than I'm used to on my old mountain bike.
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Old 06-30-06, 10:14 PM   #4
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The most important measurement on a bike frame is the top tube length. Find out how much reach you need first, then go from there.
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Old 07-01-06, 05:40 AM   #5
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I've got 2 58cm frames and a 61cm frame. I'm 6'1".

The 61cm frame works, but the reach feels a bit too far, even with a 10mm shorter stem. The 58cm frames initially feel a little small, but after many long rides, they are certainly comfortable.

I have yet to try a 59cm frame for any distance.

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Old 07-01-06, 09:12 AM   #6
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Originally Posted by buttfish77
. . . I guess my only gripe is that the saddle needs to be slid all the way back in its track in order for my knee to be properly positioned over the pedal . . . .
Even so, sounds like you made it work. That can be a bigger challenge on a road bike, compared with mtb bikes with more shallow seat tube angles, for some guys with longer legs (it's also a challenge for riders, especially gals, whose upper leg is relatively long compared to overall leg length). Setback seatposts have simplified things; otherwise, you need a road bike with a more layed back seat tube angle. Then, you're further away from the bars and that can be a problem so you need a shorter stem, or you need a larger frame but there's too little standover height so you need a downward sloping top tube, or . . . My guess is you have a few things to consider which make it more difficult to get an ideal fitting bike right off the rack.

Last edited by wagathon; 07-01-06 at 09:22 AM.
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Old 07-01-06, 09:23 AM   #7
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Originally Posted by Patriot
The most important measurement on a bike frame is the top tube length.
Word. I don't know what this crazy obsession with seattube length is... Pretty pointless.
If you can't measure up the bike and have to go by the manufacturer's sizing, you're better off looking at the range of sizing... E.g.: "they make 5 sizes of this model, I'm 5'11", so the second biggest should be about right"

Sounds like your ideal size would have been a 59, but a bit smaller is not too bad at all.
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Old 07-01-06, 10:19 AM   #8
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I'm 6ft and ride a 57, but check the geometry of it first. I'm riding about 566 Seat Tube / 570 Top Tube.

Different companies use all different geometries. But if its close to what mine is, I ride mine just fine. In fact, I daresay its the perfect height for me.

Seat tube matters, but it matters to me on how relative I want my handlebars to my seat. If I'm riding drops and the frame is too small, my saddle is going to be rather high, which is going to affect the ride (because the bars will be slightly lower, technically).
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Old 07-01-06, 11:58 AM   #9
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Thanks for all the replies! I'm doing OK with the 57cm so far, I just wanted to see if my choice of frame size was way off base.
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Old 07-01-06, 12:11 PM   #10
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bike fit depends a lot on the bike--and the rider
I have a 57 track bike (fixie), a 56 road bike (standard frame) and a 54 road bike (compact geometry)--I am 6 feet tall. All the bikes 'fit' me pretty well.
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Old 07-01-06, 10:27 PM   #11
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Lemond Reno 1998 model in a 57 for me. The top tube is (duh, Lemond) too long but otherwise it fits fine.
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Old 07-02-06, 06:16 AM   #12
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My Jamis Nova is 57cm and I'm 6'-0". Fits like a glove, although some days (maybe when I too tired to get my leg over) it seems a tad too tall.
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Old 07-02-06, 02:37 PM   #13
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Quote:
Originally Posted by buttfish77
Thanks for all the replies! I'm doing OK with the 57cm so far, I just wanted to see if my choice of frame size was way off base.
It's up to you. I am 5'11", but all leg. I felt smushed on a Trek 56 cm frame and so am riding a 58 cm frame. Need to move the seat forward both for knee positioning and reach, but it much more comfortable for commuting to have the extra leg room.
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Old 07-02-06, 03:20 PM   #14
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Not that it matters, because as said it really depends on the maker and the particular rider, but I'm 6' 2", with a longish torso and have a 57cm (classic geometry) Litespeed frame (among a couple of 58 cm frames).

I was advised that better a bit too small than too large, and to some better a bit too small than 'right' size. (I surmise, to minimize flex) It took some time and adjustments and man is it one sweet ride! I just finished a particularly grueling solo century and afterwards I hurt in all the right places!

Last edited by EGreen; 07-03-06 at 01:25 AM.
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Old 07-03-06, 09:09 PM   #15
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Try using one of the online fit calculators to see what size frame you should be using given your body measurements. If you aren't of average build, one or more of the frame dimensions will likely need to be compensated for and the calculator will give you an idea of which one.

I'm 5'11", average build, riding a 57cm Sequoia with a 56.5cm top tube. Based on a fit calculator, the top tube length is about an inch too long for my build so I felt a bit stretched out with the stock 120mm stem and saddle, even with the saddle pushed almost all the way forward. Switching to a 110mm stem and Brooks B-17 saddle (which could be adjusted farther forward) allowed me to get the handlebar/seat distance just right.
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Old 07-04-06, 12:05 AM   #16
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I'm 6'2" and my road bike is a 57 with a 57cm top tube. With a 120mm stem and a post with a little setback it's comfy. The only time I wish I had a slightly bigger frame is on steep seated climbs where it takes more effort to keep the front end down and tracking straight than I'd like. I think a lot of that has to do with the steep head angle though.
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