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Re: 1x11 gearing on a bent

Posted: 6 Jul 2019, 6:03pm
by UpWrong
Still no cassette, but this looks good if I can make a customised 13-40T cassette:
http://ritzelrechner.de/?GR=DERS&KB=33, ... H&DV=teeth

Re: 1x11 gearing on a bent

Posted: 7 Jul 2019, 3:21am
by UpWrong
In the name of science, I have ordered a Goatlink and a 40T expander sprocket :lol:

Re: 1x11 gearing on a bent

Posted: 24 Jul 2019, 10:16pm
by speedy7777
You probably went the right way with the double. My recumbent bike is set up with 44t single front ring and 11-40 - 10 speed cassette. After about a thousand K im finding id like a little more top speed (currently spinning franticaly to hit 60kmh) eg 48t or 50t. It would also be a better road bike if the gears had smaller gaps between them. But the simplicity of 1x is quite nice nice too. So a double would have suited me well and i might try it one day with a 11 -32 cassette but in the mean time maybe try a 46 tooth front ring.

Re: 1x11 gearing on a bent

Posted: 30 Jul 2019, 4:27am
by UpWrong
I've been riding my RANS Stratus XP with its 3x9 and it's given me pause for thought. The triple on that is so easy and nice to use - it has SRAM X9 with its 1:1 actuation ratio. I believe the exact ratio is 1.1 to 1. My Paseo currently has a 2x9 using Deore RD, actuation ratio is 1.7 to 1. It's performance has deteriorated with use. (See https://www.artscyclery.com/science-behind-the-magic/science-behind-the-magic-drivetrain-compatibility/)The triple on the RANS is a 28-38-48 Spa chainset with Sora FD. Ring changes are easy and smooth with the 10T gaps.

So I either change my Paseo to 2x10 with XT-Dynasys (actuation ratio 1.2 to 1) or re-instate the 3x9 with SRAM X9. The double solution will use a 33-48 compact double. I'm wondering how slick or not the 15T change will be.

Re: 1x11 gearing on a bent

Posted: 29 Dec 2019, 4:06pm
by UpWrong
I have made up a 13-40T 10 speed cassette with XT RD mounted on a Wolf tooth goat link and XT shifter. Cabling and gear adjustment was very easy.
IMG_20191229_123539.jpg
IMG_20191229_150408.jpg
IMG_20191229_150717.jpg

Re: 1x11 gearing on a bent

Posted: 12 Jan 2020, 6:28pm
by UpWrong
So got to do a test ride with the new configuration today. It felt strange to be back on it after 6 months of using other bikes. It will take me a while to get my confidence back. Have to says it's an easy machine to balance though. It's amazing how you can set things up on a stand but still need to make adjustments whilst on the road. I over-ran the bottom sprocket and had to screw the limit screw in a bit more. As a reminder this is the gearing,
http://ritzelrechner.de/?GR=DERS&KB=33,48&RZ=13,15,17,19,22,25,28,32,36,40&UF=1990&TF=80&SL=3.5&UN=MPH&DV=teeth

I seemed to be ok starting in bottom on the big ring. I will probably change the FD to an SRAM X5 double, which should make the pull onto the big ring easier. I will then have to weigh it if this really is my final config.

Re: 1x11 gearing on a bent

Posted: 8 Feb 2020, 6:07pm
by UpWrong
I have done some further rides and the 2x10 gearing is working out. I kept the SORA FD double operated by Deore LH triple shifter. I just had to rotate the shifter to make it easier. The XT RD and XT Dynsys shifter are a delight. A big improvement over the 9 speed Alivio. I removed a chain link to eliminate a small amout of chain wrap and all 20 gears are perfectly usable. With the 33/48 double and 13-40 cassette the RD is having to cope with 42T difference which is well within spec. The step up and down at the front (around 45% change up) is slick enough not to cause me grief.

So I just need to do a final weighing.