I am not familiar with 10 speed at all - you are going to probably need a mid-cage RD though.

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I'll echo the no-drops. I have used both Wolf Tooth and Sram X-Sync chainrings and the only time I have ever dropped a chain is in a crash (CX race).

I commute daily through San Francisco and dropping/hopping curbs, crossing train tracks, potholes, terrible pavement, etc has not led to any drops. Only used standard Shimano and SRAM derailleurs without a clutch.

If you use a narrow/wide ring, you do NOT need a clutch for chain retention.

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/kj

http://kjmcawesome.tumblr.com/

I am running a 46t front ring matched up to a 11/28 rear. For training rides this has been OK for now. I have done some training rides on the course for my next race and I am finding that I am not needing anything more than my 23 so I am thinking about running an 11/23 for that race and keeping it tighter spacing for the race.

I am still playing with the set up but maybe a 50t front ring as well would be a nice option to have as well.

Thanks, I think I'm going to put a SRAM wifli on there

Thanks for all the info everyone.
I think I'm going to go with a 32 at the back and a 50 on the front.

I'm a bit of a spinner, owing maybe to the short cranks, 155s. I risk losing a bit of easy leverage in the saddle if I slow down on hills. So I think it's best to go with caution!

So I've been looking at the courses

One of them has a longish section of 7% grade but that's about it.

The other has lots of short sharp hills, mostly only 0.5k long, around 7-8% but one has a 12% section in.

I've never been good at judging hills but 12% is fairly high!

155 cranks then definitely a 50. When I was on 162.5 I had a 52t and that was plenty. Even at 165 I used a 52t for some time. When I went back up to 172.5 I bumped up to 54t

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Can anyone recommend a chaining, 50t in 130bcd?
All the sram x sync ones seem to be 11bcd for 50t

I was going to say Wolf Tooth but it looks like they only have 44t and 52t and nothing in between? I take it you have a crank that is also a power meter?

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I have P1 pedals.
My cranks aren't as short as the OP - I use 165, but figure I could do with a 50t. The cranks are a bit special so I don't want to change BCD

I can't get over the fact that we have an apparently 5w/kg ametuer triathlete here. Can't be many of those around even on ST :)

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24 Hour World TT Champs-American record holder
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Me?

There are plenty around surely.

Here goes the front door brag, and the explanation.

FTP around 360-380, tends to vary a little but tests indicate.

This is also going uphill, in aero I'm shocking!

Weight 69-71kg.

CdA - 0.26!! 0.26 dammit! This is post wind tunnel!

Have I solved your mystery?

Your front door brag is well earned.

I don't think there are hardly any age groupers. A few sure.

I live right outside Minneapolis / St. Paul. There are some very fast triathletes here. A few that are generally in the running for Triathlete of the year / etc. I can't imagine anyone is 5w/kg.

I am close on a road bike, but I can't touch it in the TT position. 5 w/kg on a road bike seems like a completely different ball game to many of us than 5w/kg on a TT bike which to me makes it super impressive.

Unless I'm completely in the dark I don't think the top pros are making much over a legit 5w/kg on their TT bike. I think even Lionel is only like 5.3 on his potentially happy Powertap pedals?

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24 Hour World TT Champs-American record holder
Fat Bike Worlds - Race Director
Insta: chris.s.apex

Another quick question.

If I was to run a 52, just so I could use it for TTing, I would use a 32 at the back.
The jumps on this are huge,

Can you in theory run half a climbing cassette - so the top 3 sprockets being 25-28-32 and then using the bottom set from a normal cassette so something like 11-18.
Would that jump from the 25 to the 18 cause too many issues?

How do y'all size your chains? I'm going to be using a 50t, 11-32, and 6870 DI2 Ultegra (med cage). Does SRAM's "big-big plus 4*" apply to this drive-train as well?

*Is the quicklink included in this 4 or not?

I'd rather take the gradual jumps of the stock cassette than a huge jump mid-cassette.

But then again, I've been riding a 10-speed 11-28 for ages, and SRAM 1x 10-42 off-road, so maybe I'm just less bothered by small jumps.

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ZONE3 - We Last Longer

For a 10 speed 11-32 set up I ran a standard SRAM Force mid-cage RD (also worked on an 11sp set up)

The new SRAM X1 Force and Rival (clutch) RD's are compatible with both 10 & 11 speed. I changed to an X1 Rival RD as I did get one or two chain drops with the standard RD (very rare, however). Since then I haven't dropped a chain once.

Oh and my current set up is a 54 front, 11-32 rear 11sp.

My ideal cassette ratio would be the following, alas I can't find one anywhere... :(

11-12-13-14-16-18-21-24-27-30-34

I run a 52T ring and 11-28 for racing. 11-32 for training or hilly races. Perfect for me.

I did big big plus 2 then the quick link. I think that's what shimano prescribes? Maybe arts cyclery? Forgot where but that's what I did and so far so good! Don't want it too tight but also didn't want it too slack since 11-32 is a big gap. But honestly not sure how much of a difference the extra two links make.

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I changed to a 50/34, 11/25 170mm 9-speed (I'll post my "budget build" shortly). I was previously using 53/39, 175mm. Position feels better but the race this weekend will be the test I guess. I'm between 250-250 ftp on the powerbeam.

Btw, I need to get some good tips on how to ride time trials (I'm trying to change from a swim focus to bike focus). Looks like here is a good place. 350ftp and up?? Damn man that's as fast as Justin Rossi. I just saw the trainer road videos on YouTube and he averaged like 370 watts for the Nationals 40k tt!! Awesome video btw.

No experience with this aspect sorry. As for jumps not the big of a deal IMO. Don't even notice.

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Sorry to bring this up again.

I'm considering converting to 11spd, it will cost a considerable amount as I currently have a set of 10spd zipp 808s.
With all the extra money and faff, is it worth it for 1 extra gear?

Nope.....train more or lose weight, get a better skin suit or helmet....just my two cents.

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"see the world as it is not as you want it to be"

Wtf has that got to do with the question?

The questions was specific to the thread regarding 1x setup, and going from 10-11 to give the extra range.

It has nothing to do with anything you mentioned, so what you said was stupid and a typical I'm going to ignore your question and try and put you down.