27.5” vs. 29er:


Which Mountain Bike is Proper for Me?


For years, wheel dimension wasn’t one thing most mountain bikers thought of when searching for a motorcycle. That’s as a result of all mountain bikes got here with commonplace 26 in. wheels.

Then, alongside got here two wheel sizes which have, for probably the most half, overtaken 26 in. wheels. First on the scene have been 29 in. wheels (29ers), adopted just a few years later by 27.5 in. (also called 650b) wheels.

The proper dimension for you largely will depend on what you’re seeking to get from a mountain bike and the kind of terrain you wish to trip.

At-a-glance comparability of 27.5” vs. 29er mountain bikes:






Extra environment friendly




Assault angle










Favors shorter riders

Favors taller riders

Take take a look at rides: As you think about 27.5 and 29 in. wheels, remember the fact that one of the simplest ways to be taught the variations is to really feel them for your self. Swing by your native fitnessinf or bike store and take each for a take a look at trip.

Store 27.5 Mountain Bikes
Store 29er Mountain Bikes


27.5 in. wheels have sooner acceleration whereas 29ers are extra environment friendly on longer rides.

Smaller wheels speed up sooner than bigger wheels. That is due principally to the place the burden of the wheel is distributed. Bigger wheels place the burden of the spokes, rims, tubes and tires farther from the middle of the wheel, leading to increased rotational mass and slower acceleration. If you lower down on the rotational mass of a rolling object it should roll sooner and with extra ease.

27.5”: Quicker acceleration is commonly cited as one of many greatest advantages of a 27.5” wheel when in comparison with a 29” wheel. Wheels that speed up sooner give a motorcycle a handy guide a rough, responsive really feel that many riders need.

29”: Wheels that speed up slower take longer to stand up to hurry, presumably giving the bike an unresponsive really feel. Nevertheless, as soon as the bigger wheels attain prime pace, they’re truly extra environment friendly for longer rides than smaller wheels as a result of they require much less effort to maintain their momentum going.


Due to their higher floor space (aka “contact patch”), 29 in. wheels have higher traction (when evaluating comparable tires).

27.5 in.: These wheels present superb traction and are good for many functions. Different issues, resembling acceleration, weight and match could in the end be extra necessary components in your alternative of wheel dimension.

29 in.: These wheels, with their bigger contact patch, could also be your most suitable option if grip on slippery rocks and roots is a prime precedence.

Assault Angle

29ers roll over objects extra simply.

Assault angle is the angle fashioned when the spherical wheel touches a sq. object. A shallower angle is healthier as a result of the wheel can roll extra simply over the thing.

27.5 in. wheels don’t roll over objects as simply as 29ers, however they’re nonetheless very succesful. Take into consideration the place you’ll be driving: in case you’ll principally trip clean trails, 27. 5 in. wheels will serve you simply nice.

29 in. wheels have a barely shallower assault angle than 27.5 in. wheels, making them higher at rolling up and over any logs, roots and rocks that you simply’ll encounter on the path. Many riders really feel extra assured with bigger wheels.


27.5 in. wheels are lighter.

There’s no method round it; a bigger wheel is heavier. Bikes with 29 in. wheels can weigh about 2 lbs. greater than bikes with 27.5 in. wheels because of extra wheel materials and extra tire rubber.

Relying on the kind of driving you do, the burden of your bike could or is probably not essential.

In the event you’re an off-the-cuff rider: The burden distinction between 27.5 in. wheels and 29 in. wheels is probably not your greatest concern. You would possibly care extra about traction and assault angle.

In the event you’re aggressive or go on long-distance cross-country rides: You’ll most likely be searching for methods to save lots of weight. Going with a smaller wheel is one option to cut back weight, but it surely’s not the one method. You can even look into ultralight carbon fiber frames, handlebars, seatposts and rims.

Setting your wheels as much as be tubeless is one other nice option to cut back weight. Tubeless wheels not solely cut back total bike weight, however additionally they speed up sooner due to decreased rotational mass and so they have the additional benefit of with the ability to run at decrease tire strain for higher traction.

Maneuverability (Body Flex)

27.5 in. bikes are extra maneuverable.

A 29 in. bike is extra versatile as a result of elongation of the body that comes with the bigger wheel dimension. This can lead to a motorcycle that feels more durable to deal with in tight turns.

In the event you repeatedly trip tight, twisty trails, you would possibly want the texture of a 27.5 in. bike. 27.5 in. wheels retain numerous the snappy really feel of the unique 26 in. dimension, whereas sustaining most of the advantages that include a bigger wheel.

29ers roll over obstacles extra simply, so you might discover you don’t miss the snappy really feel of smaller wheels, as you’re in a position to go up and over rocks and roots somewhat than attempting to shortly maneuver round them.


29ers are sometimes higher suited to taller riders.

The bigger 29 in. wheels have an effect on the general geometry of a motorcycle body extra drastically than 27.5 in. wheels. This will make it tough for shorter riders (particularly these shorter than 5 ft. 6 in.) to discover a 29er that matches properly. Check trip each wheel sizes in case you can.

Taller riders, particularly these over 6 ft. tall, could want the texture of a motorcycle with 29 in. wheels. Nevertheless, a motorcycle with 27.5 in. wheels may also match tall riders properly, so determine the place your priorities are associated to acceleration, traction, assault angle and weight first.

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