Chainring sizing?
#26
Newbie
Do that many of you actually use the 11, 12, 13 cogs with a 50T front? Question not a challenge. I can't turn those cogs. For me, the problem is that the 2-tooth gaps occur exactly where my "home gearing" is on the flats. Again, for me, that is 50T with the 19T. I like a close ratio cassette where my preferred cadence is spot on. So, I built my own cassette out of a 11-30 and a 14-28. (11 speed groupo) Wound up with a 14-30 that works great. And lots of 1 tooth gearing changes right in the middle of my sweet spot; 14 through 21.
Can I spin out occasionally with a 50-14 combination? Yes, occasionally; but that is at 28 mph; rare for me. I guess we all have different strengths, riding styles, outdoor conditions, etc. My point is that a lot can be done on the cassette end of things.
Can I spin out occasionally with a 50-14 combination? Yes, occasionally; but that is at 28 mph; rare for me. I guess we all have different strengths, riding styles, outdoor conditions, etc. My point is that a lot can be done on the cassette end of things.
#27
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Do that many of you actually use the 11, 12, 13 cogs with a 50T front? Question not a challenge. I can't turn those cogs. For me, the problem is that the 2-tooth gaps occur exactly where my "home gearing" is on the flats. Again, for me, that is 50T with the 19T. I like a close ratio cassette where my preferred cadence is spot on. So, I built my own cassette out of a 11-30 and a 14-28. (11 speed groupo) Wound up with a 14-30 that works great. And lots of 1 tooth gearing changes right in the middle of my sweet spot; 14 through 21.
Can I spin out occasionally with a 50-14 combination? Yes, occasionally; but that is at 28 mph; rare for me. I guess we all have different strengths, riding styles, outdoor conditions, etc. My point is that a lot can be done on the cassette end of things.
Can I spin out occasionally with a 50-14 combination? Yes, occasionally; but that is at 28 mph; rare for me. I guess we all have different strengths, riding styles, outdoor conditions, etc. My point is that a lot can be done on the cassette end of things.
It's really difficult to tell what you're actually asking about. Looking at Shimano cs-r8000, if you have an 11 speed cassette (not sure if you do) I don't see how you're missing the 18t that you want. In fact if you mixed 14-28 with 11-30, you'll get 14-15-16-17-18-19-20-21-24-27-30
and if the 21-24-27-30 is too big of steps for you, then you could use the full 14-28 as originally arranged 21-23-25-28
And if you don't have a low enough gear then you could change the 36t inner chainring to a 34t or 33t depending on the BCD, but that's also only a 6-9% drop, but enough to make up for the 7% increase from 30t to 28t of the last position cassette.
Or if you're stuck between 17-19 and want to be in 15-16-17, then that's a 12-13% increase in the cogs, so you'll have to drop the 52 chainring to a 46 to drop 13%.
If you have something different or I'm completely misunderstanding and you have a 12 speed cassette, you can get the Miche cassettes which will let you choose the 18t that you want.
Last edited by tomtomtom123; 02-14-24 at 05:43 PM.
#28
Junior Member
Do that many of you actually use the 11, 12, 13 cogs with a 50T front? Question not a challenge. I can't turn those cogs. For me, the problem is that the 2-tooth gaps occur exactly where my "home gearing" is on the flats. Again, for me, that is 50T with the 19T. I like a close ratio cassette where my preferred cadence is spot on. So, I built my own cassette out of a 11-30 and a 14-28. (11 speed groupo) Wound up with a 14-30 that works great. And lots of 1 tooth gearing changes right in the middle of my sweet spot; 14 through 21.
Can I spin out occasionally with a 50-14 combination? Yes, occasionally; but that is at 28 mph; rare for me. I guess we all have different strengths, riding styles, outdoor conditions, etc. My point is that a lot can be done on the cassette end of things.
Can I spin out occasionally with a 50-14 combination? Yes, occasionally; but that is at 28 mph; rare for me. I guess we all have different strengths, riding styles, outdoor conditions, etc. My point is that a lot can be done on the cassette end of things.
#29
Senior Member
I use 50x11 all the time, however I'm riding 20"/406 tires, and that's my highest gear of about 85 gear inches. On my old 700c road racing bike, I think my high was 52x13, I don't think I would ever need 11. On a long gentle downhill, pedaling as fast as I could, I topped out the speedo at 64 or 65 kph (40mph), that appeared to be its limit. Once I got away from flat land and into hill country, the best thing I did was put on a road triple crank, which I swapped from a bike I picked up cheap, for my 52/42 Biopace double, then resold that bike. The triple happened to be half-step-plus granny, I didn't need the half-steps, just that granny low.
#30
Newbie
Yes. I have 14-15-16-17-18-19-20-21-24-27-30. I did this versus the standard 14-28 for big climbs like Mt. Lemmon. This, combined with the compact 50/34 gives me a lot of flexibility. I ride 50/19 mostly at 17 to 18 mph and do not have much need for the 11, 12, 13 cogs. And with the 34 chain ring, I get some good climbing gears.
#31
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I undestand your point but road cycling is full of unnessesary upgrades and this one could be one 😄
My point is to get smaller cassette jumps in my comfortable area (cadence and speed) without massive cross chaining.
Mostly I'm using bigger ring and many times found myself using 19t 17t in back. Cadence 90 it is little over 30km/h. Almost never needed 11-13t sprockets and also 36t is rarely needed as my area is totally flat.
In ideal situation I just want 18t in back but that is not possible.
But you are right. I have to consider all option. Maybe even 1x could be one option with 46-48t chainring
My point is to get smaller cassette jumps in my comfortable area (cadence and speed) without massive cross chaining.
Mostly I'm using bigger ring and many times found myself using 19t 17t in back. Cadence 90 it is little over 30km/h. Almost never needed 11-13t sprockets and also 36t is rarely needed as my area is totally flat.
In ideal situation I just want 18t in back but that is not possible.
But you are right. I have to consider all option. Maybe even 1x could be one option with 46-48t chainring
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