1x11 Cassette: Largest Cog Size You Run? (42T, 46T, 50T...)

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1x11 Cassette: Largest Cog Size You Run? (42T, 46T, 50T...)
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Posted: Jan 24, 2020 at 10:55 Quote
I am upgrading to 1x11 from 1x10. While riding 1x10, I used an extended range cassette from Sunrace and a 32T front chainring.

I ride mostly northeast area super technical trails that have short and super steep and technical ups, followed by short and technical downs. I hardly pedal on the downhill, if ever. However, this year I am going to make it up to NH and VT more (kingdom trails, etc) where I may need to do some extended climbing up fire roads followed by some fast descents.

I was planning on using a 30T chainring up front and an 11x42T cassette from Sunrace for my 11 sp setup (HG driver hub). When shopping for this cassette, I noticed that there are some options for largest cog on cassette being anywhere from 42T to 52T.

What do you run? What would you recommend for my riding area?

Posted: Jan 30, 2020 at 13:58 Quote
am-i-back wrote:
I am upgrading to 1x11 from 1x10. While riding 1x10, I used an extended range cassette from Sunrace and a 32T front chainring.

I ride mostly northeast area super technical trails that have short and super steep and technical ups, followed by short and technical downs. I hardly pedal on the downhill, if ever. However, this year I am going to make it up to NH and VT more (kingdom trails, etc) where I may need to do some extended climbing up fire roads followed by some fast descents.

I was planning on using a 30T chainring up front and an 11x42T cassette from Sunrace for my 11 sp setup (HG driver hub). When shopping for this cassette, I noticed that there are some options for largest cog on cassette being anywhere from 42T to 52T.

What do you run? What would you recommend for my riding area?

I literally just did this conversion about 2 weeks ago. I moved from 1x10 to 1x11. I run a 30T oval NW chainring up front and a Sunrace 11-50T 11spd cassette. Deraileur I use is a Shimano SLX medium cage 11spd and a 11spd XT shifter.

It all works flawlessly. Shifting is smooth going both directions. Absolutely love it.

Posted: Jan 30, 2020 at 16:52 Quote
I have a Sunrace 11-50 with an XT medium cage derailleur, and have run it with a 32T, 36T and 38T chainring.
They all work fine, but it was a bit fiddly initially to get it shifting smooth when using the 38T. Someone on reddit mentioned using a 12 speed chain which definitely helped and all the shifting is now smooth and easy.
The shifting is not as fast as the old XT cassette, but it's certainly good enough.

Definitely works slightly better with the 32T. I use the 38T when I'm using my bike as a "road bike". (its a Scott Spark 940).

Posted: Jan 30, 2020 at 19:43 Quote
I'm going 30T front ring and Sunrace MX 11sp 11-42T black rear cassette.

Thanks everyone.

Posted: Mar 13, 2020 at 18:24 Quote
Does anyone know the configuration of the Spacers on a 12 speed Sram GX1275 it’s a HG driver
I took mine off & the rings & spacers fell off & went everywhere. I managed to put it back together but I think the spacer between the 10th & 11th gears are off the chain Skips it’s not a derailleur issue the bike shifts great in all the other gears. I just noticed the spacing is off on the 10th & 11th gears. There’s about 10 spacers mostly the small flat kind there’s 1 large that goes between the 2 halves of the cassette & 1 medium that I know is not in the right place. Any help would be greatly appreciated really don’t want to take it to the shop.

Posted: Mar 14, 2020 at 4:23 Quote
What is the best option today for a 1x11 (30x11-42) - shimano vs sram ?
Talking about top-lines as xtr & x01 (xx1)..

Posted: Mar 28, 2020 at 18:49 Quote
SoCalTrailRailer wrote:
Does anyone know the configuration of the Spacers on a 12 speed Sram GX1275 it’s a HG driver
I took mine off & the rings & spacers fell off & went everywhere. I managed to put it back together but I think the spacer between the 10th & 11th gears are off the chain Skips it’s not a derailleur issue the bike shifts great in all the other gears. I just noticed the spacing is off on the 10th & 11th gears. There’s about 10 spacers mostly the small flat kind there’s 1 large that goes between the 2 halves of the cassette & 1 medium that I know is not in the right place. Any help would be greatly appreciated really don’t want to take it to the shop.
Some of the cogs have built in spacers. The others have loose spacers that are each the same thickness. Just have a look and check that the gaps between cogs are even, if not it should be obvious.

Posted: Mar 28, 2020 at 18:57 Quote
jasminov wrote:
What is the best option today for a 1x11 (30x11-42) - shimano vs sram ?
Talking about top-lines as xtr & x01 (xx1)..
I ran xt m8000 11-42, then upgraded to 11-46 to make climbs easier.
My new bike came with SRAM XO1 11 speed 10-42 that I had pre-judged to be not as good and planned to swap my XT over to the new bike.
The SRAM had a more defined and definite “CLACK-CLACK-CACK” as it shifted through the gears. I decided to keep the SRAM and sell the Shimano XT.

Posted: Mar 29, 2020 at 0:38 Quote
Been on 30T chainring 10-42 cassette for a while, it’s perfect on a trail bike riding areas without long steep sustained climbs. Recently put a 12 speed 10-45T on my enduro bike still with a 30T chainring and that bit lower gear really helps with the heavier less efficient bike in the climbs. I’m still not convinced the huge range 50T cassettes are needed, unless doing serious climbing & 30 - 10 on my 650b wheeled bike provides the highest gear I ever need off road so don’t feel I need any bigger chain ring. Maybe they are on 29ers - no experience on big wheels but as the wheels are bigger I’d imagine a bit more range maybe required.

Posted: Mar 31, 2020 at 14:52 Quote
jasminov wrote:
What is the best option today for a 1x11 (30x11-42) - shimano vs sram ?
Talking about top-lines as xtr & x01 (xx1)..

Makes no sense. I would go 32x46 give yourself higher gearing. 30x11 spins out too soon even for me with legs like jack skellington. Obviously sram gives you the option of a 10. Alternatively if you genuinely intend to spend that much, go for the ethirteen 9-46 if your frame will take it and you have massive range.

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