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Ending The Debate: 29er vs. 26″ Mountain Bike

Posted on October 22, 2011 by Dave W

29er vs 26 inch Mountain Bike

With the widespread adoption of the 29er mountain bike in manufacturing and the mountain bike community, the growing debate of 29er vs. traditional 26? mountain bikes is getting hot amongst riding groups. If you are in the market to upgrade your current mountain bike or get into the sport, your options are wider than ever which is a good thing for the sport but can be debilitating when looking to purchase a new rig.

There is no “right answer” for every mountain biker, so let’s take a look at the 26? vs. 29er mountain bike debate and see where it shakes out in my opinion. This topic is probably the most debated in the industry, so you will find that every rider has what they think is the right answer for you (typically what they bought).

Before we get into what will work best for you, let’s take a look at this larger wheel size and see how it affects the mountain bike in a general way.

What does a 29er do well?

Rolls over rocks and roots easier due to the wider circumference.More distance covered per pedal revolution.Higher air volume in tires smooth out ride.

The larger diameter wheels of the 29er mountain bike can create the sensation of having an 1? more travel than the bike is spec’ed due to the larger air volume and larger contact patch with the ground. For this reason, it has become the go to size for much of the hard tail and shorter travel mountain bikes in the industry. The racing world has really embraced the larger wheels size for these benefits it brings to the trail.

What are the drawbacks of a 29er?

Large size equals larger weight.Harder to maneuver in tight, twisty single track.Longer travel (5.5? and higher) 29ers feel REALLY big.Sizing and geometry issues with smaller riders.Larger radius needs stiff wheel build and fork to prevent deflection.

Just as with any big change, it is not all good news. While the true 29er zealots will probably tell you these things are not true, the reality is that you are adding bigger wheels to the mountain bike than traditional 26?, so there are going to be negative side affects that go along with the positive changes.

When you are taking a look at the 26? vs. 29er mountain bike, there are several personal questions you need to ask yourself as you make your decision. As with all things, there is no right answer that fits all people. How you ride your bike and how you want it to react is the most important factor when making this decision…not what your friend bought and says is the best.

So here is how I see it shake out…

As the distance from your head to the ground increases, the 29er wheel size actually becomes more proportional to your size. Riders in the 6 foot and up crowd that are looking for a XC to light AM mountain bike should test ride a 29er just to see how they like it. You might find that it fits perfectly and you have finally found a bike that feels like it actually fits. Shorter riders in the 5’6? range and lower will need to take a serious look at geometry and test ride different frames as they might find the bike feels too big or isn’t able to maneuver as well. I have known shorter riders that have loved the bigger wheel size, but that is typically in hard tail applications.

Taller Riders: YesShorter Riders: Maybe

While the argument that a 29er “adds an inch” of travel is almost true in theory, there is a big difference in 140mm forks and 160mm forks in mountain biking. The thicker stanchions and construction make a huge difference for riders looking to get into the more technical side of riding. If you are in the market for a 140mm or 160mm travel mountain bike, a 120? travel 29er is not going to give you that same stiffness and confidence from a bike build and component standpoint. Also, as you move up in travel the bike feels bigger and when you add in the larger wheel diameter, that gets multiplied and can hold you back in slow tech and DH situations.

However, if you are looking at lighter 130mm to 140mm travel 26? mountain bikes and you are taller, the 120mm travel 29er might be a great option. It will roll over technical rocks and roots on most single track easier and you will still be able to keep the overall bike weight under 30 pounds in most cases.

In the short travel and hard tail mountain bike market, the 29er mountain bike has almost completely taken over.

HT and 100mm travel and under: Yes120mm to 130mm: Yes140mm: Maybe160mm and up: No

As mentioned before, 29er mountain bikes do take more to maneuver through tight single track. If all of your riding is filled with tight turns in trees, you will want to try out a 29er on your own local trails before making a decision. On the other side of the spectrum, if your trails are more open and rocky, the 29er wheel size can really excel and bring more speed as you can hit sections faster.

Do a lot of racing and forest service road riding? A 29er is almost a no brainer in those situations. If you don’t believe me…just try to keep up with a 29er rider on a FSR. This adds up with the shorter travel and hard tail mountain bike market.

Tight and twisty: MaybeOpen and rocky: YesRacing and FSR: Yes

When I spec out my personal mountain bikes given trail conditions, this is how everything lays out for me personally given my specs. I would describe my riding style as technical. I like to find the nasty lines possible and make them ridable at speed. For this reason, I typically like to ride mountain bikes with big forks and more travel, but I also like to dip into the XC and race side every now and then as I have a background in those applications. At 6’1? tall, I fall into the taller side of the sizing spectrum in between large and x-large. To fit my need to find all tech riding, I am on large size mountain bikes to keep the bike easier to move in slow tech.

Singlespeed and Hard Tails: 29erShort Travel Race Bikes (100mm and under): 29erTrail bike (140mm and higher): 26 inch

As of right now, I have not found a 29er mountain bike that has been able to handle what I want to throw at a 140mm travel or higher mountain bike. It has not been agile enough and the 32mm stanchion forks mated with higher radius wheels are not built to withstand the abuse. Given the specs of 29ers, I do not see this changing for me as a rider.

On the shorter travel end, there are a lot of advantages of the larger wheel size that have made a couple of 29ers the fastest bikes I have ever ridden for those applications. I doubt if I will ever go back to 26? wheels for anything under 100mm worth of travel.

As you take a look at all of these specs, you have to look inward at your body type and riding style to see which wheel size will be the best option for you. There is no right option for everyone and the 29er wheel size is not going to take over the mountain biking industry like a lot of the Kool-Aid drinkers are trying to say. The larger wheel diameter does have some serious advantages in certain situations, but it also does not work for others.

The best option…test ride your top 26? candidate on your local trail and the top 29er candidate if they are available. If they aren’t, find the closest substitute. At the end of the day, you are the one making the investment in your mountain bike and you will be the one riding it…not everyone else that is trying to inject their opinion in your buying decision.

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