You’re ready to buy a bike, but feeling intimidated by all the numbers and specs? One of the first steps in picking a new bike is knowing which size bike you need.
There are a couple of different ways women’s bikes are measured and sized, and we’re going to walk you through all of it. And there’s no need to feel intimidated: it’s all super straightforward.
Video Explanation
Step 1: Understanding Bike Measurements
The first thing to understand is that there are two basic measurements when we’re talking about bike size: frame size and wheel size. Wheel size refers to the diameter of the wheel and is less important than the size of the frame.
Mountain bike wheels come in three basic sizes: 26″, 27.5, and 29″. Very petite women may want a 26″ wheels but most will be best served by a 27.5″ or 29″ wheel.
These two wheel sizes are becoming more common on modern mountain bikes, so if you are buying a bike new, it’s likely to have 27.5 or 29 inch wheels. If you are buying an older used mountain bike, it may very well have 26 inch wheels.
Hybrid bikes and cruiser bikes usually have wheels that are sized in inches like mountain bike wheels, although they may also be sized like road bike wheels.
Road bike wheels usually come with 622 mm diameter (700C) wheels, although smaller women may want 571 mm (650c) wheels. Commuter bikes may use this same sizing convention as well.
All that said, wheel size should be a secondary consideration to frame size.
Step 2: Know How Women’s Bike Frames are Sized
Frame size determines how big or small a bike is and whether or not it’s going to fit you. Unfortunately, not all bikes are measured in the same way.
Women’s bike frames may be measured in inches or centimeters, or come in generic sizes (S, M, L). Much of this is dependent on the type of bike you are looking for.
Women’s Road Bike Sizes
Most women’s road bikes measured in centimeters. The centimeters refer to the length of the seat tube.
The smaller the measurement, the smaller the bike. Because different bike brands size their bikes differently, your best bet is to check the website of the bike manufacturer you are considering buying from. They should have a bike sizing chart that will use your height and inseam to tell you which of their bike sizes is best suited to you.
That said, you can also use the chart below help you get a general guideline of which size bike you should be shopping for.
Women’s Road Bike Size Chart
| Rider Height | Frame Size (in centimeters) | Frame Sizes (S,M,L) |
|---|---|---|
| 4'10"-5'1" | 44-46 | XXS |
| 5'1"-5'3" | 47-49 | XS |
| 5'3"-5'5" | 50-52 | S |
| 5'5"-5'8" | 53-55 | M |
| 5'8"-5'10" | 55-57 | L |
Women’s Mountain Bike Sizes
Many mountain bikes are measured in inches. The inches refer to the length of the seat tube.
These will commonly be sized as 15″, 17″, 19″, and 21″. The smaller the seat tube, the smaller the bike. Mountain bikes may also be sized more generically: S, M, L, etc.
Bike manufacturers usually have their own sizing guides, so once you’ve narrowed it down to a few bikes you might like, then look on the manufacturer’s website to ensure you’re getting the right size. These charts will usually use your height and inseam length, so make sure you have your measurements handy.
Although these sizes won’t be universal amongst manufacturers, you can also use this chart as a basic guideline of what size bike you’re probably going to need.
Women’s Mountain Bike Size Chart
| Rider Height | Frame Size (in Inches) | Frame Sizes (S,M,L) |
|---|---|---|
| 4'10"-5'2" | 13-14 | XS |
| 5'2"-5'6" | 15-16 | S |
| 5'6"-5'10" | 17-18 | M |
| 5'10"-6'0" | 19-20 | L |
Hybrid, Commuter, and Cruiser Bike Sizing
Bikes that are intended for recreational and commuting type riding may be sized like a road bike, although they are more commonly sized in inches like a mountain bike. Use the guidelines above for road bikes and mountain bikes to understand the sizing.
The other thing to be aware of with these bikes is that the frame may have a lower top tube–these are known as a step-thru frame. This may make them a better fit for women with a short inseam (or simply those who would like to wear a skirt).
- Read: 9 Best Women’s Hybrid Bikes
- Read: 5 Best Women’s Cruiser Bikes
- Read: 9 Best Women’s Commuter Bikes And City Bikes
Additionally, some of our favorite city bikes (like the electric Radpower RadCity) come in a one size fits all frame. Both my husband (5’10”) and myself (5’5″) are easily able to ride the RadCity by adjusting the seatpost length. This may be a good option if the idea of finding the right size bike just feels overwhelming.
Step 3: Make Sure to Ride the Bike Before Buying
The best way to know if a bike is going to fit you is to get on the bike and ride it for a while. If you’re buying from a bike shop, they should let you go take it for a lap around the block. Some shops will even let you demo a bike so that you can have the bike for a day or two to determine if it’s a good fit.
(Note: while trying a bike before buying is ideal, a lot of bike shops right now have very low or no inventory. Or, you might be eyeing a bike that is only sold online. If this is the case, don’t panic…..keep on scrolling and we’ll give you some tips on how to buy without riding the bike first).
How do you know if the bike fits you? You should be able to stand over the frame of the bike with both feet on the ground. Swinging your leg over the bike to get on and get off should be easy.
The seatpost (which is adjustable) should ideally be neither dropped all the way or raised all the way. You should adjust the saddle so that it hits you right at the hip bone if you are standing next to the bike.
When riding the bike, the reach to the handlebars should be comfortable. You shouldn’t feel stretched too far over to reach the handlebars, nor should you feel cramped. Your knees should have plenty of clearance between them and the handlebar when at the top of your pedal stroke.
The bike shop should also be willing to help you ensure you’re buying the right size bike. If they are unhelpful or make you feel intimidated, walk out and look for a different shop.
Bonus Step: Get a Professional Bike Fitting
If you can afford it, we highly recommend a professional bike fitting. Not every bike shop will offer this service, so ask google for one near you or ask friends who bike.
While this service isn’t cheap, it will ensure that you get the correct size bike and that it is set-up correctly for your body. In addition to helping you find the right size frame, a bike fit may show that you need differently sized components, like a shorter stem or narrower handlebars.
Size Charts For Some Of Our Favorite Bike Brands
There are several brands we recommend time and time again to the women in our community. While this is nowhere near an exhaustive list, here are direct links to the size charts of some of our favorite companies.
Do You Need A “Women’s” Bike?
Not necessarily. While I love that more and more companies are offering women’s-specific bikes, don’t feel that you need to limit yourself to a women’s bike. A unisex bike might work great for you.
Some reasons you may want to choose a women’s specific bike are that they often come with women’s-specific components (like anatomical saddles) and that they usually come in smaller size frames. That can be important if you are more petite.
Finally, women’s specific lifestyle bikes will often have step-thru frames that makes it easier to ride with a skirt. And lets not forget that women’s bikes often just look more femine.
For more information on this topic, read our article on the pros and cons of womens specific bicyles.
Tips For Ordering Online
While you’d ideally try a bike before buying it, the current environment is making that challenging. Many bike shops have very low or no inventory right now.
Additionally, some of our favorite women’s bikes aren’t even sold through local dealers–they are only sold online. If you are considering ordering a bike without seeing it first, take the extra time to get good body measurements (height, inseam, arm length, etc) and compare it to the size chart on the website.
Fortunately, a lot of direct to consumer bike companies that are selling solely over the internet have created tools to help make this process a lot easier. A lot of them will ask you to input your measurements and then tell you what size bike you need.
If the company has great customer service (and I’d only be inclined to buy from a company that does), you can also call or email them with your measurements and let them tell you which size would fit you best.
Tips For Short Women
Shorter women are those that struggle most with finding the correct sized bike. Unfortunately, the bike industry still heavily favors male (aka taller) riders.
Here are a few tips to help you find a bike that actually fits:
- Pay attention to stand over height. The single most important measurement you’ll want to pay attention to is stand over height. This is the height of the top tube of the bicycle. You want to be able to stand flat footed over the top tube of the bike. If you can’t do this, you won’t be comfortable on the bike.
- Consider “youth bikes.” There are an increasing number of youth-sized 26″ and 27.5″ bikes. Woom and Trailcraft are two of our favorite brands offering these bikes. The frames are sized smaller and can be a great fit for shorter women.
- Consider a custom frame. If you’re new to cycling this may not be a great option, but women who LOVE bikes and struggle to find the right size bike might want to consider a custom frame. Yes, it’s expensive but it’s a great way to get a bike that fits like a glove.
Get More Help
Now that you better understand which size bike you need, use these guides to help you pick out the best bike for you and then get rolling
Really great information to keep in mind when buying. Would have Judy guessed..
Glad to help!
I am still confused I’m 5′ 8″ but have a short leg only 28 inch so I’m just having real trouble what to buy size wise also I’m in the heavy side so will need a bike that would support my weight
Any advice would be gratefully received
Hi Debbie,
If you have short legs you want to pay particular attention to the minimum seatpost height and the standover height of the bike you’re considering, or the inseam length recommended in the bike’s size chart. Some brands will share this information on their websites, others don’t and you might have to email them or visit a local dealer to try the bike.
One bike that would fit you well is the Priority Turi (size small): https://snp.link/d297e4ea
Just make sure to buy a good quality bike (like the Priority or one from your local bike shop) as opposed to a big box store bike. Cheaper bikes don’t hold up well, especially for heavier riders.
Hope that helps a little!
Cheers,
KB
Thanks for the information! I do have a question about bikes for petite women….I’m 4″11 with a 24in inseam…after looking at sizing for some brands, it looks like youth bikes might be better for my size. However, there seems to be less information about sizing for youth bikes and wheels seem to max out at 24 inches for youth bikes. Do you have any suggestions for very petite women? Can youth bikes still work for me? I only plan on using the bike for leisure/cruising in the city less than 5km.
Hi Krista,
Yes, you would be a GREAT candidate for a youth sized bike. I’d suggest a 26 inch bike youth-sized bike. Here is a list of great options from our sister site, Rascal Rides: https://rascalrides.com/26-inch-bikes-kids-teens/
Hi Kristen,
Great article a couple of years after the fact. I’m a frustrated spouse trying to find a road bike that fits my 4’11” wife. The selection in 26″ road bikes is pretty grim:
https://rascalrides.com/best-24-road-bikes-kids/
The component sets are questionable at best but I’m looking through my 105 lenses. Most on the list aren’t available or are in the UK (US for me). I ended up getting a Tommaso Forcella XXS (44cm) and while the standover height is works, the top tube is too long. I’m coming to the realization that drop bars may not be viable for her given her size. I think like 10 years ago you could get some adult road bikes with the 650 wheels, but no one who has one today seems to want to let them go (understandably!).
Hi Krista,
I’m also 4’11 and I am having hard time looking for an appropriate bike size. Did you end up getting the 26″ youth size? How did it go? I’m considering size 24″ but I saw your comment and thought I might ask you first. Thank you!
Hiii. I am also 4’11…yesterday I have tried a youth bike size 24 inch… Seems suit me
.but yet I need to tried size 26inch with smaller frame… So have you managed to get a bike yet
i have concern with my mountain bike, i am 5’1 and have a 24″ bike is this too small for me? I find my foot rubs the front wheel when I turn. I have never encountered that issue before. PLease help me adjust my bike or i just have a worng bike
I see no other reply, but seeing as I’m an avid road and mtn biker, I already did the research for my girls. you can adjust your 24″ wheel bike all you want, but your foot will always rub on front wheel when turning a bit(current bike for my girls, too). this is dangerous as you can lose steering control, hence balance and then take a spill. for your safety, please upgrade to a more permanent(for 5’1″ with 24″+ inseam) hybrid bike like Liv Rove 2 DDisc (xs) or Liv Bliss 2 disc xs or s; depending on standover height (give yourself a couple of inches of clearance). need to try in-store; check arm reach, too to complete sizing. Liv’s website does have online measurements. I find Giant/Liv best cost to benefit ratio. Trek/Specialized may on average be $100 more for name and possibly slightly better wheels. Make sure rear hub body (under cassette) can be upgradeable to 11-speed(width=35mm); which these are.
I am a tall large woman with a long torso. Often bikes are too short front to back. My cannondale fits well that way but as I age I am less able to be stable while standing and need a curb to mount the bike. It’s really too big to stand over. Is it possible to use smaller wheels? I’m also looking at a 19” Schwinn that is a step thru. Will it be too short front to back?
try CGN youtube for proper sizing; which is key. what i’m reading is that your current bike is close but, wrong size for you. didn’t mention which year, model and size of cannondale you have. need some measurements of body to verify on each bike website. must have height, inseam and reach(body at waist to hands with 90degree bend at shoulder). only way to be sure is to try, in-person in local bike shop. they can help. some places take trade-in or kijiji it. good luck.
Terrific video and article! Thanks so much for your knowledge. I feel confident to go pick out the right sized bike now.
Thanks for this very helpful information. I’m having a difficult time finding the right city bike. I’m 5’ 10” and have a 34” inseam. Wondering if you can recommend or give some additional guidance.
Thanks!
Hi Marcia, take a look the Roll City bike. Women’s Size 2 is what you would want.
Hi Kristen,
I’d like to buy a road racing bike for my time still in France then to live in NZ. I’m 5’4″ in height with inleg seam at 69cm so a size frame as small. I’d like carbon fibre if possible. What do you suggest at a price range as low as possible?
Thanks Alessandra
Hello! I know this guide is a couple of years old but I’m hoping you’ll get this & reply. I have a 10 yr old son (August of this year) who’s 4’4” with a 23-23.5 inseam. So he’s probably on the shorter side. New rider. What brand of bike would you suggest? Would you go with a 20” wheel? Thank you in advance,
Hi, I’m trying to help my wife search for a bike and I have a couple of questions.
I’m curious why there’s such a large difference between recommended frame sizes between road bikes and mountain bikes – looks like about 3.5 inches (47cm ÷ 2.54cm/in = 18.5in vs 15in for mountain).
Also I’m surprised that the recommended road frame size is 18.5+ inches for the 5’1″-5’3″ height range. That seems quite large, though I’ve seen it on at least 1 other web site.
I was originally advised in Halfords to buy a medium Boardman road bike which I did. Then it got nicked. I looked up new ones again and although I’m 5’3.5 the chart is saying a small. Can you explain this?
My wife and I decided to buy a bike after consulting the women’s bike size chart. It saves us a lot of time when choosing an expensive and suitable bike.
I just purchased a new LIV 3 bicycle. I am having a difficult time getting comfortable on the saddle. What do you recommend for a less painful riding experience?
Hi I recently purchased a secondhand specialised road bike but without doing my homework I’m not sure if the frame size is too small for me
I’m 5ft 4ins 29in leg the frame size 37cm