While there is nothing wrong with 3x10 system, the 1x11 are getting more and more popular. Why? 1x11 provides a wide range of gear ratios, you have only one shifter, no repeating gears, less weight and much cleaner looks.
The math- is it really worth it?
I did fast gear ratio calculations for my current set up which is 11-36 cassette with 22-30-40 chain rings. With green I have marked my 2 favourite gears I use when pedalling full speed, last gear has too big ratio and is useful for me only on straight and long descents on the tarmac or really hard sprinting. As it goes for climbing, I don't really use first gear, it is too slow and I lose balance because of lack of speed or rear wheel looses traction, 28t seems like the sweet spot with its 0.79
Next table has 1x setup ratios. On the first row, I have
What I will need to convert to 1x11?
The cassette is the easiest part, 11 speed Shimano cassette is compatible with 10-speed Shimano cassette, I only need to choose which configuration suits me best and swap cassettes on my rear wheel. Judging from gears how I use on my 3x10 set up,
Nothing really to add here,
3) Rear Derailleur
This one is a bit tricky. M8000 rear derailleur comes in 2 sizes, medium and long. Long is meant to be used with 11-46 cassette and 2/3x set ups, it will work with 1x11, but chain dropping might be an issue, but if you ever think about changing back to 2x11 or 3x11 set up, buying long version derailleur might save some money.
4) Gear Lever
New derailleur with more gears means new gear levers. In my case, any 11 speed Shimano gear levers will fit. I choose Deore XT M8000, to match all groupset.
Chain Ring, Opportunity to Save Money
I have Shimano FC-M523 Octalink Crankset which has 3 chainrings. My bottom bracket is
Option one is to buy M8000 bottom bracket and XT 1x cranks. Price is about 100$ for cranks, 40$ for chain ring and 20$ for
Option two is to buy only 96mm 34t chain ring for 50$, shorter chain ring bolts for 10$. Remove all chain rings from current cranks and