26 jan 2016
GETTING THE PERFECT 1X11 SETUP WITH MEGATOOTH
There are many benefits to running a single ring at the front, but with the revolutionary MegaTooth design, not all of them are obvious.
Clearly you’re going to drop plenty of weight – removing the front shifter, mech, cable and extra rings will ditch around half a kilogram (1lb) – but you’ll also benefit from some clever new design.
As there’s no need to derail the chain onto another ring, the MegaTooth can be designed for fantastic chain security. Very long, asymmetric teeth in a thick-thin alternation create a tremendously quiet, secure engagement.
On a mountain bike this creates further weight savings, as it also removes the need for a heavy chain device.
How easy are they to fit? Surprisingly easy, so long as you note a few important details – as follows.
Chainring Bolt Circle Diameter
First, you must make sure you get a chainring with the correct Bolt Circle Diameter (BCD) for your cranks. The BCD describes the spacing of the mounting holes in the ring, and determines if they’ll align with the spider on your crank.
To find your BCD, check the existing rings – they probably have it stamped on them. If not, either try the crank manufacturer’s product page, or measure center-to-center across opposing bolts (not adjacent bolts).
MegaTooth rings are available in five BCDs, with the common 104mm option bracketed by standards from 76mm to 110mm.