27 Inch Bike for What Size Person? (27 Inch Bike Size Guide!)

Are you considering buying or upgrading a new bike that suits you better? Choosing a bike shouldn’t be hard.

However, if you’re inexperienced in buying a new bicycle, it’s understandable if you don’t have the confidence to decide which one to buy.

Many people are like you. They’re afraid to make a buying decision on something they don’t understand.

Fortunately, you can learn if the 27-inch bike suits your needs. So kindly read on to know if this Mtb suits your height and requirements.

Who Uses a 27.5-inch Bike?

Adults with heights from 5’2″ to 5’10” can use the 27.5-inch bikes. However, children aged 12 years and above may use them if they’re taller than 150 cm or 59 inches.

27.5-inch Bike

If you prefer to use the 27.5-inch adult bike, you should compare the bike’s standover height and your inseam length.

To measure your inseam, you should stand straight and measure the distance between your thigh’s uppermost part and your ankle.

Then, check the bike’s standover height or the distance between the bike’s top tube and the ground.

If your inseam length exceeds the bike’s standover height, you can use the 27.5-inch bike.

However, if you don’t meet the requirement, you may opt for any bike lesser than the 27.5-inch bike.

The 27.5-inch bicycle is for competitive and recreational cyclists because it provides better maneuverability and speed than other mountain bikes.

Generally, this bike is for challenging landscapes. It has larger wheels for you to accelerate faster.

The 27.5-inch bike has no age restriction. However, children may use it if they can bike comfortably.

Like adults, a child should have an inseam length higher than the bicycle’s standover height.

What Does 27.5-inch Bike Mean?

Many people don’t realize that the 27.5-inch bike description is for the mountain bike wheel size, not the bike frame size.

Many cyclists refer to the 27.5-inch mountain bike as a “Tweener” because it’s between the 26-inch and 29ers. Its wheels can quickly navigate through tricky and tight trails.

Moreover, the 27-inch bike has shorter chainstays, optimized rear suspension, and tube systems for smoother and more accessible maneuvering.

History of the 27.5-inch Bike

Kirk Pacenti introduced the 27.5-inch bike in 2007. The bicycle’s design divides the speed and handling control for easier maneuvering and faster acceleration.

However, the 27.5-inch mountain bike only became famous when Nino Schurter won the world cup in South Africa using it.

Moreover, Nino Schurter won an Olympic silver medal in London with the 27.5-inch bike.

Manufacturers began producing more 27.5-inch bicycles. Today, professionals and recreational cyclists use this bike.

27-inch vs. 27.5-inch Bikes

Features27-inch bike27.5-inch bike
Tire Width25 to 27 mmUp to 56 mm
Rim Diameter27 inches27.5 inches
Wheel Diameter680 to 684 mm584 mm
Terrain TypeOn-road cyclingOff-road riding
SuspensionSame suspensionSame suspension
Handlebar TypeDrop barsFlat bars
GeometryRace geometry (speed-oriented and more aggressive)Similar to many mountain bike geometries (cyclists sit in an upright position)
Bike Weight More weighty than the 27-inch bike

27.5 vs. 29er Bike

Attack AngleGoodBetter
FitShorter ridersTaller riders

Pros and Cons of 27.5-inch Bikes


  • Lighter than a 29er; therefore, easier to carry
  • Balanced size
  • Faster acceleration than a 29er
  • Better traction than a 26-inch bike
  • More comfortable for a smaller rider
  • Better handling


  • More expensive
  • Components aren’t readily available
  • Slower acceleration than a 26-inch bike
  • Less traction than a 29er wheel
  • Heavier than a 26-inch bicycle
  • Less maneuverability than a 26-inch bike

Bike Accessories for a 27.5-inch Bike

  • Tracking tape, GPS
  • Frame protection tape
  • Hydration bladder
  • Emergency bike repair kit
  • Puncture-proof tires
  • Storage compartment, saddlebag

How Mountain Bike Manufacturers Size the Bikes

Manufacturers categorize mountain bikes by their frame size, which comes in all sizes and shapes.

Mountain Bike

However, manufacturers agree on a standard way for frame size description – the vertical distance between the seat post clamp and the pedals’ middle.

This component is the seat tube. Therefore, if you’re buying a mountain bike, you should ensure that your height and proportions match your preferred bicycle.

On the other hand, many brands now use T-shirt sizing (S to XL) for their frames because the MTB geometry can produce shapes making the conventional seat tube measurement unreliable.

Therefore, you should check the MTB brand websites for their calculator or bike size chart.

If the site has a calculator, you can enter your leg inseam and height to know your correct frame size.

Alternatives for Wheel Sizes

Aside from frame sizes, it would help if you also considered the wheel sizes. For example, mountain bikes can have 26-inch, 27.5-inch, and 29-inch wheels.

26-inch Wheels

Cruisers often use the 26-inch wheels, and many mountain bikers used them from the 1970s to 2000s.

However, the 26-inch measurement refers to the tire diameter that can fit on the wheel. The rim diameter for this mountain bike is 22 inches or 522 mm.

If your height is from 5’5″ to 5’7″, you can find your perfect match in 26-inch Mtb because of its efficient maneuverability.

27.5-inch Wheels

You may prefer 27.5-inch wheels if you’re into downhill mountain biking. They are excellent with obstacles and with better responsiveness than the 26-inch mountain bike.

Moreover, the 27.5-inch wheels offer more playful and quicker handling. They’re stiffer and lighter than the 29-inch wheels.

If you specialize in technical terrain, tricks, and jumps, you’ll love the 27.5-inch Mtb. In addition, if you’re a mid-sized cyclist, you’re the best fit with a 27.5-inch mountain bike.

29-inch Wheels

You may opt for a 29-inch mountain bike if you must tackle significant obstacles and roll over rough terrain. Its bigger diameter allows more traction and maximized downhill speed. You gain confidence with your ride. The 29-inch Mtb is also for taller riders.

Size Chart for Mountain Bikes

Mountain bike frame geometry differs from the hybrid bike, cruisers, and road bike models, so it’s crucial to study mountain bike-specific charts when determining the right size for you.

Suggested Wheel Size (inches)Suggested Frame Size (inches)Leg inseam (cm)Leg inseam (inches)Height (ft./in.)Height (cm)
2613 to 1462 to 7025 to 284’10” to 5’3″147 to160
2615 to 1663 to 7625 to 305’4 “to 5’7”160 to 170
27.516 to 1766 to 7826 to 315’5″ to 5’9″165 to 175
27.517 to 1868 to 8127 to 325’9″ to 6’0″175 to 183
2918 to 1971 to 8328 to 336’0″ to 6’3″183 to190
29More than 1973 to 8629 to 346’1″ to 6’6″190 to 200

How to Find the Right Wheel Size

Rider Height

The quickest and most efficient way to find the right bike size is to determine your height, which is a reliable estimate for arms reach and leg length.

Rider Height

However, some cyclists may have short or long limbs; therefore, they need additional measurements to get the right fit.

Bike Size Calculator

Many bike brands have a size calculator on their website. You may enter your leg inseam and height to get the right bike size.

However, the calculator is unique; therefore, you can use it if you already know your preferred bicycle.

Leg Inseam

You should measure your leg inseam to get the best bike for you. The inseam is the distance between your crotch and the ground.

Leg inseam is helpful because it relates to the distance between the pedals and the bike seat. You won’t reach the pedals if you opt for a too-big bike for you.

On the other hand, if you choose a bike too small for you, you won’t be comfortable with your pedal strokes.

T-Shirt Size

Many mountain bike manufacturers now use the T-shirt size instead of the conventional inches because the new frame shapes don’t reliably measure the seat tube anymore.

Unfortunately, it would be best if you did your research about the size you need. Therefore, you’ll notice size calculators on the bike brands’ websites help you choose the right bicycle.

What to Do if You’re in Between Sizes

Sometimes, bike size charts can’t provide a definite recommendation. Therefore, you may find yourself sandwiched between sizes.

You should use several bike sizing methods to help you get the recommended frame size for your mountain bike.

Generally, you choose smaller Mtb if your height is below 5’4″. On the other hand, opt for a larger frame if you have long legs or arms.

If you’re a growing teen or kid, you should choose the larger size.

Ape Index

You may use the Ape Index if you prefer a good bike fit. The Ape Index is your arm span minus your height.

If the Ape Index turns out positive, you have long arms; therefore, you should choose the larger size.

On the other hand, if you get a negative Ape index, you have shorter limbs; therefore, you should buy a smaller bike.

Generally, you don’t need to compute for the Ape index, but it’s helpful for you to double-check before buying a bike.

How to Fine Tune the Bike’s Fit

If you decide on the appropriate wheel and frame size, your next step is to fine-tune the fit to boost performance and make you more comfortable.

It would be best if you periodically tinkered with your bike setup because your riding styles and body change.

Standover Height

The standover height is the distance between your crotch and the bike’s top tube. You should stand over your bike and ensure at least an inch of a gap.

This measure ensures your safety when you make a sudden stop. Moreover, it makes you more comfortable when you hop off your bicycle.

Standover height is less significant because it’s challenging to generalize the rule across several mountain bike frame shapes.

Saddle Height

It would help if you considered saddle height to maximize efficiency and pedaling power. If it’s too high, your feet won’t reach the pedals.

Moreover, your hips will compensate by rocking side to side, increasing your risk of injuries.

Saddles positioned too low make an awkward stroke because your knees need to come far up, thus, lowering efficiency.

You should adjust the seat height to ensure that your leg slightly bends 10 to 15 degrees.

You should check the saddle position to ensure your knees don’t overextend or lockout.

You should be comfortable and able to provide power to your pedaling if your seat position is correct.

Effective Top Tube and Reach

You should also consider your upper body when shopping for a bike.

For example, your reach and effective top tube length dictate how far you should bend to hold the handlebars.

The effective top tube length is the horizontal distance between your saddle and head tube.

On the other hand, reach is the length from the bottom bracket to the head tube length. A shorter reach results in a roomier feel when you ride.

The reach is too short if you feel cramped. Decide whether you prefer a roomy and relaxed posture or a stretched-out and more aggressive position.


Who can use a 26-inch bicycle?

People with a height from 4’10” to 5’7″ can use a 26-inch bicycle. This type of bike often comes in kids bikes, cruiser, hybrid, and mountain models.

Who can use a 27.5-inch bike?

A 27.5-inch mountain bike is suitable for riders from 5’5″ to 6′. Its wheel and tire size is the new standard because of increased speed and traction.

Who can use a 29-inch bicycle?

If you’re a cyclist at least a 5’6″ height, you may opt for a 29-inch mountain bike for additional speed and traction on challenging terrain.

Which is better: a 27.5-inch or 29-inch bike?

You’ll find the 27.5-inch bike easier to maneuver. Moreover, you can quickly complete tricks or jumps with it.

On the other hand, the 29-inch bicycle is best when dealing with enormous obstacles. Moreover, it’s more efficient for long rides.

However, you may find the 29-inch bike too large if you’re a small cyclist.

A 27.5-inch bike is suitable for all trails, while the 29-inch bicycle is best for cross-country racers.

Thomas Kersten

Hi, I am a passionate biker, and I have been riding for more than ten years and share my biking tips and tricks with the world. I've tested more than 300 bikes.

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