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11spd Experiments

March 8, 2014, 5:04 p.m.
Posts: 50
Joined: Nov. 13, 2006

I have been obsessing over gearing for a new build, and I though I would post up my visual aid: a plot a gear inches on a log scale, for various drivetrain configurations (all points are for 26 inch wheels). Ideally the points would be equally spaced on this scale.

The first set of points, the blue triangles is the gearing for a 12-32 8 speed cassette with 22T/32T chainrings, which I used for many years.

The second set of points is the standard 11-36 10 speed cassette with 24T/32T chainrings up front, which I have been using more recently.

The next set of points, the red circles, is the SRAM 11-speed configuration with three different chainring sizes.

The purple triangles are the 10 speed 1x conversions: a 10 speed 11-36 cassette with the 17T cog removed and a 42T cog added, again plotted with three chainring sizes.

The green circles are for a Canfield micro-drive hub with the Canfield 9-11-13-16 cogs mated to the bottom end of a 10-speed 11-36 cassette.

The x's are for a Canfield micro-drive as above but with a 42T cog added and the 21T cog removed. Not sure how easy that would be to do, as the cassette would have to be drilled to separate the cogs. I think I saw someone saying they had done this on MTBR.

The final row is a Leonardi 10-speed 9-42 cassette for a SRAM HD style freehub. I don't know if or when that cassette will be available.

March 8, 2014, 8:07 p.m.
Posts: 816
Joined: Jan. 31, 2005

What kind of bike is this for?

There's nothing better than an Orangina after cheating death with Digger.

March 8, 2014, 8:18 p.m.
Posts: 18128
Joined: Oct. 28, 2003

I have been obsessing over gearing for a new build, and I though I would post up my visual aid: a plot a gear inches on a log scale, for various drivetrain configurations (all points are for 26 inch wheels). Ideally the points would be equally spaced on this scale.

The first set of points, the blue triangles is the gearing for a 12-32 8 speed cassette with 22T/32T chainrings, which I used for many years.

The second set of points is the standard 11-36 10 speed cassette with 24T/32T chainrings up front, which I have been using more recently.

The next set of points, the red circles, is the SRAM 11-speed configuration with three different chainring sizes.

The purple triangles are the 10 speed 1x conversions: a 10 speed 11-36 cassette with the 17T cog removed and a 42T cog added, again plotted with three chainring sizes.

The green circles are for a Canfield micro-drive hub with the Canfield 9-11-13-16 cogs mated to the bottom end of a 10-speed 11-36 cassette.

The x's are for a Canfield micro-drive as above but with a 42T cog added and the 21T cog removed. Not sure how easy that would be to do, as the cassette would have to be drilled to separate the cogs. I think I saw someone saying they had done this on MTBR.

The final row is a Leonardi 10-speed 9-42 cassette for a SRAM HD style freehub. I don't know if or when that cassette will be available.

..

March 9, 2014, 9:36 a.m.
Posts: 2309
Joined: April 2, 2005

there's a better tool for that: http://www.ritzelrechner.de/

MTB-Freeride.TV

March 17, 2014, 12:59 p.m.
Posts: 3518
Joined: May 27, 2008

I'm going to guess that the answer is no, but I can't find anything concrete: can 1x11 work with 135mm dropouts?

Being cheap is OK. Being a clueless sanctimonious condescending douchebag is just Vlad's MO.

March 17, 2014, 1:09 p.m.
Posts: 21
Joined: Nov. 20, 2002

I'm going to guess that the answer is no, but I can't find anything concrete: can 1x11 work with 135mm dropouts?

why not?

http://www.epiccyclist.com/

March 17, 2014, 1:10 p.m.
Posts: 816
Joined: Jan. 31, 2005

I'm going to guess that the answer is no, but I can't find anything concrete: can 1x11 work with 135mm dropouts?

You need the special XD driver (freehub body) to be able to run the 11spd cassette. I'm pretty sure the XD driver width is the same as 10spd.

I can't seem to find specs that say SRAM makes a 135mm hub with the XD driver. But it looks like Hope does: http://www.jensonusa.com/Hope-XD-Driver-For-Sram-XX1

There's nothing better than an Orangina after cheating death with Digger.

March 17, 2014, 1:11 p.m.
Posts: 3518
Joined: May 27, 2008

why not?

Pictures I've seen online seem to indicate a thru-axle, which points me to 142mm since that's all the rage. As I said I can't find anything concrete that tells me that it's possible to run an 11spd SRAM drivetrain on a bike with 135 dropouts.

Being cheap is OK. Being a clueless sanctimonious condescending douchebag is just Vlad's MO.

March 17, 2014, 1:26 p.m.
Posts: 3518
Joined: May 27, 2008

Ok so according to this link there is a conversion kit for Stans hubs for 135 XX1.

Being cheap is OK. Being a clueless sanctimonious condescending douchebag is just Vlad's MO.

March 17, 2014, 1:39 p.m.
Posts: 21
Joined: Nov. 20, 2002

Pictures I've seen online seem to indicate a thru-axle, which points me to 142mm since that's all the rage. As I said I can't find anything concrete that tells me that it's possible to run an 11spd SRAM drivetrain on a bike with 135 dropouts.

142 and 135 is the same spacing, the only difference is the frame (or dropouts) have a 3.5mm step.
http://www.pinkbike.com/news/12x142-explained.html

http://www.epiccyclist.com/

March 17, 2014, 1:48 p.m.
Posts: 3518
Joined: May 27, 2008

142 and 135 is the same spacing, the only difference is the frame (or dropouts) have a 3.5mm step.
http://www.pinkbike.com/news/12x142-explained.html

I realize that but before I saw the conversion kit I wasn't sure if the larger cassette (hence different freehub) meant that maybe it wasn't possible to wedge XX1 into 135mm.

Being cheap is OK. Being a clueless sanctimonious condescending douchebag is just Vlad's MO.

March 17, 2014, 2:07 p.m.
Posts: 816
Joined: Jan. 31, 2005

I realize that but before I saw the conversion kit I wasn't sure if the larger cassette (hence different freehub) meant that maybe it wasn't possible to wedge XX1 into 135mm.

I believe the special freehub was to accommodate the 10t cog rather than the extra gear.

There's nothing better than an Orangina after cheating death with Digger.

March 17, 2014, 3:17 p.m.
Posts: 3518
Joined: Dec. 17, 2003

I believe the special freehub was to accommodate the 10t cog rather than the extra gear.

This. DT also makes 135 QR XD drivers.

March 18, 2014, 10:01 a.m.
Posts: 5635
Joined: Oct. 28, 2008

I'm going to guess that the answer is no, but I can't find anything concrete: can 1x11 work with 135mm dropouts?

It can and does. See Morgan's Root Down for proof.

Wrong. Always.

March 18, 2014, 10:32 a.m.
Posts: 835
Joined: Sept. 10, 2012

Bike is a Santa Cruz Nomad:

- 42T WT GC
- SRAM PG 1070 cassette
- SRAM chain PC 1031
- Shimano Zee derailleur and shifter
- Race Face 30T NW ring
- stock B tension screw…didn't need the extra long one that came with the WT GC

I gave it a shot and it works just fine. At least in the stand. I'll get a full test ride in shortly.

I removed the 15T cog as I use the bigger cogs much more than the smaller ones. I was going to ditch the 13T cog, but it mates with the 11T cog to generate the correct spacing so I left it.

I cycled the suspension and there is enough derailleur capacity to deal with chain growth.

Selling my large Cotic BFeMAX [frame only] ---> https://www.pinkbike.com/buysell/3234988/

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