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-   -   Addiction LXXVIII (https://www.bikeforums.net/showthread.php?t=1197210)

Velo Vol 05-25-20 05:45 AM


Originally Posted by datlas (Post 21495590)
Holy carp. A local cyclist who I know (not well, but I have done some group rides with him and follow him on Strava) Everested yesterday and he did it on a fairly short hill just a few miles from here.

It could have been you.

ls01 05-25-20 05:55 AM

It is so quiet here this morning its kinda creeping me out a little.

bampilot06 05-25-20 06:04 AM

https://cimg6.ibsrv.net/gimg/bikefor...ac5dd13e2.jpeg
https://cimg7.ibsrv.net/gimg/bikefor...f71931ce6.jpeg

Smallest chain ring and smallest cog and my chain is resting against the chain stay. Is something off?

datlas 05-25-20 06:08 AM


Originally Posted by Velo Vol (Post 21495633)
It could have been you.

I am not disciplined enough. No thanks. As Dirty Harry said, ďA manís got to know his limitations.Ē

datlas 05-25-20 06:10 AM


Originally Posted by bampilot06 (Post 21495658)
https://cimg6.ibsrv.net/gimg/bikefor...ac5dd13e2.jpeg
https://cimg7.ibsrv.net/gimg/bikefor...f71931ce6.jpeg

Smallest chain ring and smallest cog and my chain is resting against the chain stay. Is something off?

I am thinking chain needs to be a little shorter? But see what others say.

seedsbelize 05-25-20 06:23 AM


Originally Posted by bampilot06 (Post 21495658)
https://cimg6.ibsrv.net/gimg/bikefor...ac5dd13e2.jpeg
https://cimg7.ibsrv.net/gimg/bikefor...f71931ce6.jpeg

Smallest chain ring and smallest cog and my chain is resting against the chain stay. Is something off?

Effectively cross-chained. Have you tried riding it in that configuration? Often it doesn't work. There's no reason, as you can get that ratio elsewhere. As I recall, the rule for chain length is big ring/big cog and add a link. Somebody please correct me if I'm wrong.

rjones28 05-25-20 06:23 AM


Originally Posted by ls01 (Post 21495647)
It is so quiet here this morning its kinda creeping me out a little.

Thunder storm rolling thru.

datlas 05-25-20 06:29 AM

Time to ride.

seedsbelize 05-25-20 06:34 AM

A song for the times. It popped into my head this morning.

rjones28 05-25-20 06:35 AM


Originally Posted by seedsbelize (Post 21495675)
Effectively cross-chained. Have you tried riding it in that configuration? Often it doesn't work. There's no reason, as you can get that ratio elsewhere. As I recall, the rule for chain length is big ring/big cog and add a link. Somebody please correct me if I'm wrong.

Close. Big, big, plus two. That's without running the chain thru the RD, BTW.

bampilot06 05-25-20 06:48 AM


Originally Posted by seedsbelize (Post 21495675)
Effectively cross-chained. Have you tried riding it in that configuration? Often it doesn't work. There's no reason, as you can get that ratio elsewhere. As I recall, the rule for chain length is big ring/big cog and add a link. Somebody please correct me if I'm wrong.


Are you saying Iím riding cross chained in that configuration? I would have thought that with only two chain rings, the smallest chain ring and smallest cog would be fine, nor does it look like itís causing the chain to be at any angle vs largest chain ring and largest cog.

seedsbelize 05-25-20 06:58 AM


Originally Posted by bampilot06 (Post 21495704)
Are you saying Iím riding cross chained in that configuration? I would have thought that with only two chain rings, the smallest chain ring and smallest cog would be fine, nor does it look like itís causing the chain to be at any angle vs largest chain ring and largest cog.

Well, that's the definition of cross-chained. That configuration might be fine on your bike. I can only speak from experience, on 40 year old bikes. Jonesy can clear this up, I'm sure.

rjones28 05-25-20 07:08 AM

Modern drivetrains tolerate cross-chaining pretty well. It looks like R7000 on [MENTION=510040]bampilot06[/MENTION]'s bike.

LAJ 05-25-20 07:09 AM


Originally Posted by datlas (Post 21495666)
I am thinking chain needs to be a little shorter? But see what others say.

You're correct, sort of.

The chain is too long for that gear choice, and it's by design. Little/little gear ratio can be has with the big chain ring and a more suitable cassette cog, as seedsbelize said. In this case, the cross chain isn't angle, it's the physical capabilities of the bike.

rjones28 05-25-20 07:10 AM

I mean, it's still less efficient. Extreme chain angles create more friction.

rjones28 05-25-20 07:12 AM

But I have been known to cross-chain for short stretches. Especially, in rolling sections when I don't want to bother with the FD.

LAJ 05-25-20 07:16 AM


Originally Posted by rjones28 (Post 21495741)
But I have been known to cross-chain for short stretches. Especially, in rolling sections when I don't want to bother with the FD.

Same, but usually in big/big. Little/little gives me noise I don't like.

bampilot06 05-25-20 07:16 AM

Iím not good at quoting everybody. But thank you for clearing that up. My CAAD was the old three chain rings and I typically rode the middle chain ring, when I switched to this I just assumed it was similar and didnít think anything of it. I was concerned because in that picture the chain looks to long, but if I go big and big it looked appropriate and I didnít think I could take any more links out. Appreciate the help.

Velo Vol 05-25-20 07:25 AM


Originally Posted by datlas (Post 21495662)
I am not disciplined enough. No thanks. As Dirty Harry said, ďA manís got to know his limitations.Ē

You'll never be an elite cyclist with that attitude.

Bah Humbug 05-25-20 07:30 AM

Had my best/ longest run since banging up my heel a while ago. Felt awesome.

In other news, a local race company seems to be intending to run an actual live & in-person sprint/Oly in mid-July.

WhyFi 05-25-20 07:32 AM


Originally Posted by bampilot06 (Post 21495749)
Iím not good at quoting everybody. But thank you for clearing that up. My CAAD was the old three chain rings and I typically rode the middle chain ring, when I switched to this I just assumed it was similar and didnít think anything of it. I was concerned because in that picture the chain looks to long, but if I go big and big it looked appropriate and I didnít think I could take any more links out. Appreciate the help.

I recall you saying that you were getting some chainslap previously, and I mentioned that it was probably too much chain - this certainly looks like too much chain. Well, either that or the RD doesn't have a cage long enough to take up the slack of the gearing range, but I wouldn't think that Cervelo/Competitive would make that kind of mistake. Do the Shimano sizing that rjones mentions - big/big +2.


Bah Humbug 05-25-20 07:33 AM


Originally Posted by bampilot06 (Post 21495749)
Iím not good at quoting everybody. But thank you for clearing that up. My CAAD was the old three chain rings and I typically rode the middle chain ring, when I switched to this I just assumed it was similar and didnít think anything of it. I was concerned because in that picture the chain looks to long, but if I go big and big it looked appropriate and I didnít think I could take any more links out. Appreciate the help.

Di2 generally prevents small chainring/ smallest two cogs for this reason. The problem with that is, small/small is generally the easiest gear combo for rear wheel removal on a tri bike.

bampilot06 05-25-20 07:51 AM


Originally Posted by WhyFi (Post 21495778)
I recall you saying that you were getting some chainslap previously, and I mentioned that it was probably too much chain - this certainly looks like too much chain. Well, either that or the RD doesn't have a cage long enough to take up the slack of the gearing range, but I wouldn't think that Cervelo/Competitive would make that kind of mistake. Do the Shimano sizing that rjones mentions - big/big +2.

https://www.youtube.com/watch?v=LC8_ndnXJUY

Yea I kept forgetting to post a picture of it, I was waiting to hear from seattleforrest as well if he had a similar issue with his c3. Iím surprised that CC would have left too much chain. But Iíll fix it and stop riding small small.

WhyFi 05-25-20 07:57 AM


Originally Posted by bampilot06 (Post 21495805)
Yea I kept forgetting to post a picture of it, I was waiting to hear from seattleforrest as well if he had a similar issue with his c3. Iím surprised that CC would have left too much chain. But Iíll fix it and stop riding small small.

In general, I like to avoid the small chainring - front shifting has gotten really good, but it's still no comparison to what a rear derailleur can do. Being down at sea level and with very little elevation nearby, I'd probably never use the little chainring unless I was pedaling in to hurricane headwinds.

bampilot06 05-25-20 08:01 AM


Originally Posted by WhyFi (Post 21495820)
In general, I like to avoid the small chainring - front shifting has gotten really good, but it's still no comparison to what a rear derailleur can do. Being down at sea level and with very little elevation nearby, I'd probably never use the little chainring unless I was pedaling in to hurricane headwinds.


I honestly thought it would be worse for the rear derailer if I was large chain ring and on the 4 5 6 cog. Atleast that was my logic.


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