Mountain bike gear charts


Seeing the rise in interest in new wheel sizes and 11 cogsets sourced it is time to bring up new gear charts for MTB’s.

29ers and 650b wheels have greater circumferences and therefore the distance travelled per crank revolution is modified in proportion.

622mm bead seat rims with 50mm wide tyres (aka 29er) have 11.2% more perimeter than 26 inches wheels (559mm).

As far as for the 650b wheels are concerned (584mm) the discrepance is only 4.5%.

You can still use the old 26 inches chart by multiplying by the factor of 1.112 or 1.045.

Rows:  sprocket size | Columns: ring size

26″x1.95-2.0″ (2070 mm wheel circumference). Classic MTB wheel size

26 inches Bicycle gear Meters of Developement

26 inches wheel chart (meters of developement)

27.5/650b (2160 mm wheel circumference)

26 inches wheel chart (meters of developement)

27.5 inches wheel chart (meters of developement)

29er/700c x 50mm (2300 mm wheel circumference)

29er Bicycle gear Meters of Developement

29er wheel chart (meters of developement)

For further and detailed calculations I suggest this site:

http://www.bikecalc.com/

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s