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I bought a used road bike to commute into school each day (only about 4 miles roundtrip) and to go on casual rides for fun. I've only had it for about 3 weeks and prior to that have not had a bike since I was a kid. Anyway, I went to a bike store for the first time in this area and as I was getting a replacement tire for a flat, I was fitted. According the salesperson there, the bike I own is for a person 3" taller than me.

He suggested I test ride some bikes from the store and buy a new one, but I'm not able to do that right now. Is there anything I can do in the meantime to adjust the bike to better fit my body, besides buying a different bike?

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Can you stand over the top tube with flat feet? –  WTHarper Jun 20 '13 at 20:57
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A Good LBS will find a compromise that fits your wallet as well as the bike. Did he suggest ways to modify the bike to fit you better, or jump straight into the formula "Have a look at the new shiny ones, yours is <problem>...." sales pitch. At "for someone 3"", my suggestion is find another LBS. Knowing what size is it and how tall you are would be very helpful ) –  mattnz Jun 20 '13 at 21:39
    
@WTHarper, Hmm- no. I have to stand on tippy toes. –  mdegges Jun 20 '13 at 23:04
    
@mattnz, Thanks- I will go to another bike store tomorrow and see what they say. I said upright that this was my first roadbike.. maybe I should not do that next time. –  mdegges Jun 20 '13 at 23:05
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If you can't stand over the top tube, the frame is definitely too big for you. You already have some suggestions about how to make do, but you might want to consider eventually selling it and buying a different (smaller) used bike. And since you bought it used anyway, you shouldn't expect to lose money selling it. –  amcnabb Jun 20 '13 at 23:15

5 Answers 5

A couple of things to tide you over:

  1. Obviously, put the seat down as far as you can. If the post can't go any lower, you might see if you can get a shorter post, or have the current post "chopped" to a shorter length (although that will probably cost you).

  2. Move the seat as far forward as possible. To do this, you loosen the seat from the post using a hex-wrench; move the seat up, and then tighten back up. To really get the most possible, you can even try tilting the seat forward, although this might leave you feeling like you're sliding off of the bike (this is what my wife did to fit into her antique 3-speed).

  3. You can loosen the handlebars and turn them upward, so you're not as stretched over the frame. To take it one step further, you can remove the handlebars, turn them around, and put them back on backwards ("bull horn" handlebars), but that will require re-taping and doing some more serious cable adjustments. It sounds like you just want to make a quick fix without too much work.

In general, being 3" too short for a bike probably isn't too bad. All of these fixes will lead to the overall fit changing. Stay on the lookout for someone who looks a tad too small for their own bike, and maybe you can engineer a trade at some point!

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Lowering the saddle to the lowest level and see how it affects your overall position on the bike is a good start point. Coincidentally, a colleague and friend of mine has done exactly the same, and I almost thought it was you until you mentioned about school :p. Some people would stand-and-pedal, but that is not ideal to do all the time!

Another thing to try is that if your saddle slides front-and-back, see what position you require it to be fixed. This is to get your heap ergonomics right. I hope you have got your allen-key turner available at home :)

UPDATE Mind you that frame sizes for road bikes and MTBs vary a bit. What I mean is that the if you want to buy a road bike, the appropriate frame size for you will be slightly bigger than its MTB counterpart (e.g. 19" road/hybrid bike fr == 18/17" MTB fr).

If you are in the UK, the bike shops usually have charted measurements available for you to find out the optimum height and frame size for it. It would really help us if you give further information such as what exactly is the problem that you experience with this current frame size? Bob (or whoever the guy you spoke to) might have said things to sell a bike to you, but he could very well be right about the size. Coming back to the colleague of mine's bike, it was a carrera 18" MTB and his height is 5' 7". It was just about right, but he could have used a smaller frame. But when we adjusted the seat post height, it was alright although we could have used a slightly smaller bike size. If your round trip ride does not contain too much of steep hill climbing, you should be fine pedalling through. Again, it would be good to know what your height is and the size of bike frame you have.

Try lowering your saddle first and meanwhile, let us know your height and frame size. To help you understand, I am 6' 3" and have a perfect fit bike of 19" frame (48 cm). I can probably do with a smaller frame, tried in the past.

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Thanks for all the info. I tried lowering the seat and that helps a little. The bike I have is '54cm' and I am only about 5'5. The salesman said I needed a 50cm frame, (which sounds odd now since you said you only have a 48cm frame at 6'3!!) I am thinking I just got a dud bike salesman... –  mdegges Jun 20 '13 at 23:00
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@mdegges, hagubear was referring to frame sizes for mountain bikes, which measure smaller than road bike frames. So your salesman isn't crazy. –  amcnabb Jun 20 '13 at 23:07
    
@amcnabb My BAD!!!! I should have gone a bit easy on Bob! Yeah, Bob seems to be a helpful guy after all. Andy is right and referring again to Andy's comment above, my bike is a Jamis 2012 Hybrid and completely ignored that. I will update my answer to look a bit better. –  hagubear Jun 21 '13 at 6:16

Getting the seat/pedal distance is the first important measure so that your extension is optimal, usually about 30 degrees. With that set, then reach, fore/aft & the other variables can be dealt with & if it doesn't feel comfortable after a couple of 40-50 mile rides, get the proper size. All bikes feel good at first, but the best test is comfort for knees & back.

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As @WTHarper and @amcnabb have mentioned, you can't do much if your top tube prevents you from standing with your foot flat. You'd be replacing too much of the bike to lower it (wheels, crank, etc.).

You are not alone though. I also ride a bike that is slightly too large for me, but closer to .5".

On casual rides, I can overcome this by wearing shoes with a slight heel. If you're a lady, some wedges could easily take care of 3". Cowboy boots are also a nice option.

You probably can't mount your bike without already knowing this, but it also helps to angle the bike when standing over the frame. There isn't any reason why the bike needs to be perfectly perpendicular to the ground.

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Your best option is to sell your bike and buy another better-fitting used model.

If that isn't possible, know that bike fitting is as much by convention as by natural law, and that many early safety bicycles had what we now consider very large frames for the rider: http://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Columbia_Model_40_Mens_Safety_Bicycle%2C_1895.JPG/1024px-Columbia_Model_40_Mens_Safety_Bicycle%2C_1895.JPG To compensate, bicycles of that era used rear-facing handlebars, which significantly shortened their reach. Velo Orange makes similar handlebars today, and you could potentially refit your bike to fit you by purchasing a pair. Be aware that the handlebar diameter may differ, and you should learn and research what that means for your stem/brake levers/shifters.

You may want to add a top-tube pad to protect your crotch in the case of rapid dismount, as well.

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