Take the 2-minute tour ×
Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. It's 100% free, no registration required.

Time for new Tires on my Mountain bike.

I'm currently running a 2.1 (26").

What are the benefits of the 2.3?

I'm guessing:

  • you can run it at lower pressure and get some of the benefits of a tubeless (more traction) with the downsides (increased rolling resistance)
  • higher weight.
share|improve this question
    
The difference isn't enough to worry about. –  Daniel R Hicks Apr 18 at 22:28
add comment

1 Answer 1

up vote 4 down vote accepted

From Tom J. Stokes excellent article on choosing tires:

Wider tires tend to grip better during cornering and over rough terrain, at the expense of increased rolling resistance and weight. Wider tires will also float better in sandy conditions and are much more resistant to pinch flats when riding over sharp rocks or off of drops. For moderately rocky cross-country use, the sweet spot is between 2.0″ and 2.3″. If you primarily ride smooth hardpack or travel at a leisurely pace, choose a 2.0″ or even a 1.8″ tire. Likewise, if you tend to corner hard on the downhill and ride rough terrain, lean toward a 2.3″ tire. For downhill mountain biking where pedaling efficiency is less of an issue, look for a tire between 2.3″ and 2.6″. Tires up to 3.0″ wide are available, but rolling resistance becomes very significant past 2.6″.

The front tire is typically subjected to more cornering forces than the rear tire. Likewise, the rear tire is usually loaded with more weight while pedaling. Consider using a wider tire in the front with a slightly narrower tire in the back to get the cornering benefits of a wider tire with the rolling resistance advantages of a narrower tire in the rear. I’ve had good luck with a 2.5″ tire up front with a 2.3″ tire in the rear on my downhill bike.

Also note that widths are approximate. I’ve got a 2.3″ tire which measures 2.5″ wide with my calipers, and a 2.4″ tire which is actually only 2.25″ wide. Make sure that your frame and fork have enough clearance to support the width of the tire. Maximum tire sizes are listed in the owner’s manual. If you ride through mud often, allow for even more tire clearance to keep mud from building up between the tire and frame.

Honestly though, the difference between a 2.1 and 2.3 is very small - I would just get the highest quality tire you can afford that is between those measurements.

share|improve this answer
    
One thing too consider is that sizes of the inflated tire can vary between brands. A 2.5 from Brand A may fit between the chain stays, but a 2.4 from Brand B may be too wide. –  mikes Apr 18 at 20:09
1  
If you ignore the "size" label and look at the ertro you generally get a much more accurate guess at the true size of the tire. All tires have the ertro somewhere on the tire side. en.wikipedia.org/wiki/ISO_5775 –  Fred the Magic Wonder Dog Apr 18 at 22:18
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.