What Size Bike Do I Need? A Sizing Guide for Valley Riders
- Aug 7
- 3 min read
The most common mistake we correct in this shop is a bike one size too big. It is also the hardest one to live with, because a frame that is too long stretches your back, puts weight on your hands and turns hour three into something you stop looking forward to.
Online size charts get you close. They cannot see how long your legs are relative to your torso, how flexible you are, or how you actually ride. Here is what we look at, and what you can check before you come in.
Start with standover, but do not stop there
Standover is the clearance between the top tube and you when you straddle the bike flat-footed. On a road bike you want an inch or two. On a mountain bike you want more, because you will be getting off it in places you did not plan to.
Standover only tells you the bike is not dangerously large. It says nothing about whether it fits. Plenty of riders clear the top tube on a frame that is completely wrong for them.
Reach is the real number. It is the horizontal distance from the saddle to the bars, and it decides whether your back and hands are comfortable. Two people the same height often need different reach, which is why height-only charts fail so often.
Saddle height is the fastest win
Most riders we see are running a saddle too low. It feels safer at the stoplight and it wrecks your knees and your power over any real distance.
The rough test: with your heel on the pedal at the bottom of the stroke, your leg should be almost straight. Move to the ball of your foot and you will have the slight bend you want. If your hips rock side to side as you pedal, it is too high.
This one adjustment changes more about how a bike feels than any component upgrade at any price.
Road, mountain and hybrid are sized differently
Road bikes use centimeters and run smaller numbers, and the fit is longer and lower because you are trying to hold an aerodynamic position for hours. A Cervelo Caledonia and a Giant Contend will feel different in the same nominal size.
Mountain bikes use S, M, L and XL, and modern geometry has gotten longer and slacker across the board. If you are coming off a bike more than five years old, the size you used to ride is probably not the size you want now.
Hybrids and cruisers sit upright, so reach matters less and standover matters more. On an Electra with Flat Foot geometry the whole point is that you put both feet down at a stop without leaving the saddle.
Women-specific is not marketing
Liv builds from women-specific geometry rather than shrinking a men's frame. That usually means a shorter reach relative to standover, different bar width and a saddle designed for different anatomy.
It does not mean every woman needs a Liv. Plenty of riders are best served by a unisex frame in the right size. It means the option exists and it genuinely fits some people better.
Sizing a kid is a different problem
Kids get sized by wheel diameter, not frame size. 16, 20, 24 and then adult 26 or 27.5. The temptation is to buy one size up so they grow into it, and it is the wrong call. A bike too big is harder to control, scarier to ride and it gets left in the garage.
Buy the size that fits now. Raise the saddle as they grow. You will get two seasons out of most sizes.
What to bring when you come in
Wear the shoes you will ride in. Bring your current bike if you have one, because what you like and dislike about it is the most useful information in the room. And tell us the riding you actually do, not the riding you are planning to do. We will size to the first one.
We stock 318 bikes across seven brands in every size we can get, and every one is assembled and fitted here before it leaves. Assembly runs $80 to $300 depending on the build.
Call to Reserve: (818) 818-6262. We are at 8913 De Soto Ave in Canoga Park, open seven days.
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