1x11 gearing on a bent

DIscuss anything relating to non-standard cycles and their equipment.
UpWrong
Posts: 734
Joined: 31 May 2009, 12:16pm
Location: Portsmouth, Hampshire

Re: 1x11 gearing on a bent

Postby UpWrong » 6 Feb 2019, 10:21pm

So, the poor shifting wasn't caused by a worn chain. It was caused by the RD mounting bolt loosening :shock: Anyhow, I now have new chain fitted (old one will be kept for re-use) and the RD bolt torqued to 10Nm along with a washer to stop the bolt protruding on the inside of the chain stay and fouling the chain.

But the shifting between first and second is still poor. The biggest sprocket is holding on to the chain because there isn't enough clearance to the top jockey wheel I think. And there's no B-screw on these shadow derailleurs. I'm going to have to try an 11-34 cassette rather than the 12-36 to see if that improves it. And if it does then may have to think about changing the chainrings from 34/48 to 33/44.

UpWrong
Posts: 734
Joined: 31 May 2009, 12:16pm
Location: Portsmouth, Hampshire

Re: 1x11 gearing on a bent

Postby UpWrong » 8 Feb 2019, 9:56pm

I was right, the shifting is much improved with an 11-34 cassette. I think there is something non-standard with the RD mount on the drop out of my Nazca. THe 12-36 cassette should work with the Shadow Deore RD. I also found that an 11-34 cassette did not work with an SRAM X9 RD, even with the B-screw all the way in. Again, that's an in-spec combination.

Still have to sort out the FD shifter and the rear brake. Shouldn't be long now. :)

UpWrong
Posts: 734
Joined: 31 May 2009, 12:16pm
Location: Portsmouth, Hampshire

Re: 1x11 gearing on a bent

Postby UpWrong » 9 Feb 2019, 12:44pm

squeaker wrote:
UpWrong wrote:Zach Kaplan's comments on the MD here are that it resulted in a lot of boom flex,
http://www.bentrideronline.com/messageboard/showthread.php?t=144548
Oooh, nice link. Worth looking at the onward FB link for the pix. (I'd never heard of Mitas tyres either!)

Curiosity has got the better of me. I have ordered two Rubena/Mitas Speedo LT Elite 47-406 tyres. They are each 165g lighter than a BA. I'm determined to get my Paseo below 18Kg :evil:

nigelnightmare
Posts: 408
Joined: 19 Sep 2016, 10:33pm

Re: 1x11 gearing on a bent

Postby nigelnightmare » 10 Feb 2019, 1:29pm

The Deore Shadow RD M592 9 speed "DOES" have a "B" stop screw.

Mine does.

Looking from the rear there are three(3) screws, on the left you have the High & Low adjustment screws one above the other,
and to the right (the other side of the gear cable) is the "B" stop adjustment screw.

What it doesn't have is a gear cable adjustment.

According to the specs it has a range of 11-34 Min-Max on the cassette, which may explain the difficulty you had with the 36t first gear.
HTH
*EDIT*
I'm surprised you had problems with the Sram X9 as well.
Maybe the hanger is slightly bent!

UpWrong
Posts: 734
Joined: 31 May 2009, 12:16pm
Location: Portsmouth, Hampshire

Re: 1x11 gearing on a bent

Postby UpWrong » 10 Feb 2019, 8:34pm

nigelnightmare wrote:The Deore Shadow RD M592 9 speed "DOES" have a "B" stop screw.

Mine does.

Looking from the rear there are three(3) screws, on the left you have the High & Low adjustment screws one above the other,
and to the right (the other side of the gear cable) is the "B" stop adjustment screw.

What it doesn't have is a gear cable adjustment.

According to the specs it has a range of 11-34 Min-Max on the cassette, which may explain the difficulty you had with the 36t first gear.
HTH

Aha, you are right about the B stop screw being present. I never realised. I should have read the installation guide, except there wasn't an installation guide in the box. I think it's ridiculous that Shimano don't include a paper installation sheet in the box. It's not as if they give a simple URL link either.
Anyhow, I now have to make a decision about whether or not to try the 12-36 cassette again, which is in spec according to the technical service instructions I managed to find (but not on the Shimano web site).

UpWrong
Posts: 734
Joined: 31 May 2009, 12:16pm
Location: Portsmouth, Hampshire

Re: 1x11 gearing on a bent

Postby UpWrong » 18 Feb 2019, 11:21pm

I reinstalled the 12-36 cassette, adjusted the B-screw and all is fine. I changed the rings on the compact double to 33/44. I am able to start in bottom gear on the big ring ok, and all the gear changes work well. The steps in gears are comfortable. Compared to what I had with the SA CS-RK3 I have basically lost the two ratios at the top of the range, so now have 11 non-overlapping ratios rather than 13. The total gear range is 400% so the whole thing is similar to a 1x11 with a 12-48T cassette, if such a thing existed, with a 44T chainring.