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A bigger chainring provides closer gear ratios. After all these events are won by seconds over an hours effort. Even the tiniest percent improvement in efficiency matters. …

TA makes a 38t 110 bcd chainring. For whatever reason, it's generally easier to find odd size parts on the European Web sites. Wiggle is generally a good source. … http://www.wiggle.com/ta-110-pcd-zephyr-mtb-middle-chainring/ Vuelta chainrings are generally more easily available in the USA, but aren't as nice as the TA ones. …

(i.e. 22 teeth vs 21 teeth on the front chainring.) Unless the initial chain sizing was overly generous, you should not notice any significant difference in that small a chainring size change. …

My recollections from previous discussions about this topic is that you need to be careful to not get too low a gear ratio; if you get the front chainring very small you can have problems with stripping …

One thing to look for in modern chainrings is that the mark for the crank arm is matched on the chainring. The pins and ramps are meant to be at a certain point on the ring relative to the crank arm. … There should be a small bump or mark on the chainring to indicate how it should be positioned relative to the crank arm. …

How do you choose chainring setups? You need to analyze the gear ratios and speeds that you ride at and figure out the correct overlap for your riding. … As a rough guide if your typical speed is 25 kph, having a couple gears higher and lower on the same chainring at the rpms you find comfortable would be a good setup. …

The smallest chainring that will fit on a compact double 110 BCD is 33t and they are quite hard to find ( Only TA or custom chainwheel manufacturers make them). …

4 chainrings seems to be the feasible limit: http://abundantadventures.com/quads.html However if you add an internal planetary gear setup, A 100 speed might be possible if not practical. Here's a 6 …

The product you want does exist, but it's not significantly lighter than a front derailleur, it just works better for single rings. The are much heavier and more robust chain keepers used for Downhill …

If they use the same bottom bracket, it's at least worth trying. While 9,10,11 speed chains are different widths on the outside, they are the same width on the inside so there is a reasonable chance t …

A triple derailleur often has a shape that will not work well with double chainring. …

The gear ratio is exactly the same, the only possible difference is in the efficiency of the power transmission. Big/Big is generally more efficient, so it should be better for both, unless there is s …

Switching to a single ring crankset is going to move the chainring in about 3mm at best. The change in the widest chain angle is going to be 0.43 degrees assuming a 40cm chainstay. …