monster6667

I am about to purchese my first roadbike i messured myself and came up that im gonna need 60 to 59cm bike. Come to find out the bike im getting is 57cm. How bad is this going to be for me to ride? is there any suggestions on how to make the bike more rideable for my size? im new to these forums

-joshua

alanbikehouston

Is the bike a gift? Is there a reason you must ride a bike that you think is the wrong size? If you are buying a new bike, insist that the store order exactly the size that you need.

I am about 5 feet 9 1/2 inches tall. The inseam on my slacks is 32 inches, and my leg length from the pubic bone to the floor is 34 1/2 inches. With road bikes that have "traditional" geometry, the bikes that fit me the best are sizes 58 to 60. If your leg length is similar to mine, a size 58 would work for you.

I've gotten rid of most of my smaller road bikes, but still have several that are about size 56. By raising the saddle and raising the bars, I can get a good fit with a 56. Modern headsets make it necessary to buy a new stem when you raise the bars more than an inch or so, but new stems can be found at reasonable prices.

the beef

Nah, if you haven't even gotten the bike yet, cancel it or change it. You won't be happy on a frame size that doesn't fit. In addition to measurements, you really ought to go down to the shop and test ride some frame sizes, find the one that works for you, and then get that size instead.

monster6667

from pelvic bone to floor im at 34" exactly. The bike is a 57cm. I dont know if i can pass up the deal on this bike. How bad off would i be?

supcom

Three to four inches is a deal breaker. Don't throw your money away.

LordOpie

How'd you come up with 59-60cm? My inseam is 34."5 and I ride a 57cm.

Regardless, get properly measured and buy the right bike.

However, maybe you want to ride and you simply d.on't have enough money and this bike is "cheap". So, if you want it, before you buy it, figure out what size stem you'll need for proper reach. If it's between, say, 80-130cm. That should be close enough. Also, where will the handlebars be in relation to the saddle? If not high enough, you can get a stem riser to bring them up.

You want to adjust saddle height and fore/aft before you adjust the other parts

monster6667

thanks for your help guys. I triple checked my messurements and it seems I was off. I should be riding a 57cm bike with a 34.2Inch distance to pelvic. Im gonna ride the bike before purchese it. So i hope all is good=)

urbanknight

First of all, find out if the bike is measured center to center (C-C) or center to top (C-T). If it's the first (most likely), you might, maybe, could possibly be ok with a longer stem and seatpost. If it's the latter, that frame would fit my 30" inseam! Either way, it needs to be a really, REALLY great deal, because you'll probably be spending another hundred $$$ to make it fit you better (bar, stem, post)

alanbikehouston

Assuming you are measuring from the pubic bone to the floor to arrive at 34 inches, your slack's inseam ought to be about 32 inches. If those numbers are correct, a road bike with traditional geometry size 57 is in the ballbark. A traditional size 57 would have a standover of around 31 1/2 inches to 32 inches, which is comfortable with a total leg length of 34 inches.

Most cyclist tend to refer to the length of their slack's inseam when they say "leg length". Those are two very different terms. A guy with a 32 inch inseam usually has a leg length of about 34 inches. A guy with a 34 inch inseam has a leg length of about 36 inches. It is leg length, not inseam, that matters.

Because bike companies use three different methods to measure size, measuring standover is easier. It is the distance from the top surface of the top tube, directly behind the stem, done to the floor. Obviously, standover needs to be less than leg length, but not by much.

If you stand flat footed over the bike, and the top tube is brushing lightly against your jeans, that is okay. But if the top tube is pressing firmly against you, the bike is too tall.

monster6667

The bike is a 57cm Releigh Rush Hour.

the beef

A fixie, huh? Cool, cool

Anyway, good luck, and have fun.

Scooper

I don't think you'll be happy with a 57 cm frame; you'll probably feel cramped even if you buy a taller stem with an extension. With a 34" leg length, you should be thinking 60 to 62 cm, depending on your height.

I purloined the attached chart from the Windsor website. It's not a $200 custom fitting, but it's a starting point. We're all assuming you're talking about a traditional road bike frame geometry with a horizontal top tube.

oilman_15106

Darn I thought this was going to be a story about someone taking a hack saw to a $3000 carbon frame to make it fit.

monster6667

****ty, according to that chart, 34" , 6"0' is 60-62cm

im gonna have to cancel with this dude i guess =((( i really wanted it.

DannoXYZ 

Pelvic or pubic bone? big difference...

monster6667

pubic bone

monster6667

double post opps.

monster6667

Ok

from pelvic bone to floor, no shoes, im 34inches aka 34*2.54== 86.36cm

so my Center to Center should be 86.36*.65== 56.134cm
and my Center to Top should be 86.36*.67== 57.8612cm

not sure where being 6"0' comes into play.

This is the chart for the bike specs. Is does this seem like a pretty close fit?

Bike Chart Info



Sorry to keep badgering this i just want to atleast know if i need to go out of town to check out this bike.

plodderslusk

It all comes down to seat post and stem length and riding position. If you are comfortable with a stretched position like most of the pros use a 57 with a longer stem than the stock 100 mm should be fine. I have an old steel frame with a 56 cc seat tube and a 140 mm stem (5 degree rise stem) that works OK for me and I am also 34".

kleng

The forum always refers to the competitive cyclist fit calculator, have you used this to verify your
frame size

https://www.competitivecyclist.com/za...LCULATOR_INTRO