Your ape index is a comparison between your arm span and your height. If your arm span is longer than your height, go for a bigger frame. On a bigger bike, the reach to the handlebars will be longer. If you have proportionally longer arms, you are likely to feel more comfortable on a bigger frame. People come in all shapes and sizes, but there are typically only a few frame sizes of each model, so you will be forced into making a choice.
The good news is that bikes are adjustable and some parts replaceable. With a little work, you can get the bike fit just right. The seat post can slide up and down, the saddle can move backwards and forwards, and the handlebars and stem can be moved around. You can make all of these adjustments at home with a few standard tools. You can even do them while out on a ride if you need too. If you have space, you can use handlebar spacers to raise their height. Parts such as the stem, spacers and even replacement handlebars can be picked up cheaply and are simple to fit yourself.
To help riders find the best bike-fit, the new Carrera range of mountain bikes, road bikes, hybrids and e-bikes come in a wider variety of sizes which makes finding the right fit a little easier. If you cannot reach the pedals, the bike frame is obviously too large for your measurements. Ideally, you should be able to stand with your feet flat while straddling the top tube with the bike between your legs. If you struggle to make turns or need to sit up straight to reach the handlebars, the frame is likely too large.
You may also notice that you cannot quickly turn or pick up speed easily due to the way that you sit in a larger frame. Pain or discomfort after riding also indicates that the frame is too big for your size.
If you already suspect that the frame is too large and your body feels sore after riding, you should probably go down an inch or two. Standard bicycle frame sizes range from 13 inches to 21 inches or taller. Start with the recommended size for your height and move up or down an inch or two based on your proportions and riding style. To measure yourself for a bike frame, first stand with your feet as wide as they would be if they were on bike pedals.
Measure your inseam along the inside of your leg from the floor to your crotch. Frames are measured from the bottom bracket to where the seat post emerges from the top of the frame. Bike frame size recommendations offer a general idea of the best size for the average person of a particular height. As suggested earlier, the best most cost efficient option for you is to swap this bike for something smaller.
I am in a similiar position. I can stand over the cross-bar alright but its a bit of a stretch to the handle bars. I adjusted the seat and that felt alright. I just tried reversing the seat post so that the curve goes forward. I'll be cautious. The seat points up more than I would like but my initial impression is that this will work. I have also thought about bending the seatpost - I'll consider this but its not easy to recover from this and would make the bike difficult for a 2nd owner.
Likely using raised shoes may be more practical. Try aerobars that are adjustable so you can move the elbow padding closer in the direction of the seat. Be sure to test this going downhill as you would changing the handling characteristics with more weight over the front wheel. If it feels unstable, send your aerobars back.
Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Is it possible to make a larger bike fit a smaller person? Ask Question. Asked 8 years, 4 months ago. Active 5 months ago. Viewed k times. Improve this question. Can you stand over the top tube with flat feet? A Good LBS will find a compromise that fits your wallet as well as the bike.
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.
WTHarper, Hmm- no. I have to stand on tippy toes. I said upright that this was my first roadbike.. 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.
Show 2 more comments. Active Oldest Votes. Having too small of a bike places you too far forward on the bike. Sliding your saddle back can help solve this. The first way to do this is to loosen the bolts on the rails of the saddle and slide it back as needed. Standard typically ranges from 10mm to 20mm. And if you find a post with the right set back but the diameter is too small you can use pre-made shims to make it fit properly.
The next area of the bike that is probably going to be an issue is how close the handle bars are to your body. The solution to this is a longer stem which will push the bars further out in front of you. Depending upon how long the stem is now, you can get a stem around mm to mm in length.
The thing to watch out for here however is with an increased stem length, the handling of the bike decreases because of how far the bars are from the pivot point, the steerer tube. The last thing that you will probably have to do on a slightly small bike is to raise the bars. You can do this in two ways. The first is to make sure that the stem is placed at the very top of the steerer tube with no spacers above it.
The second is to get a stem with a high angle which will raise your bars. Zero to seven degrees or so is typically average but you can find stems with angles above fifteen degrees.
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