Know the rules The Paceline Forum Builder's Spotlight


Go Back   The Paceline Forum > General Discussion

Reply
 
Thread Tools Display Modes
  #1  
Old 10-09-2014, 08:46 AM
FastforaSlowGuy FastforaSlowGuy is offline
Senior Member
 
Join Date: Nov 2011
Location: Andover, MA
Posts: 2,030
CX single ring on a double crankset - advice

I'm putting together a CX build and am interested in turning my double crankset into a single ring setup. Do I install the ring on the outside (as Praxis shows), or on the inside with a bashguard on the outside (as I've seen elsewhere?
Reply With Quote
  #2  
Old 10-09-2014, 08:48 AM
bicycletricycle's Avatar
bicycletricycle bicycletricycle is online now
Senior Member
 
Join Date: Sep 2009
Location: RI & CT
Posts: 9,046
inside with bash on outside should yield better chainline unless you are always super truckin in the 11
__________________
please don't take anything I say personally, I am an idiot.
Reply With Quote
  #3  
Old 10-09-2014, 08:49 AM
thirdgenbird thirdgenbird is offline
Senior Member
 
Join Date: Dec 2012
Posts: 9,615
I've done inside with a bash guard. Praxis probably doesn't want to hide their product.
Reply With Quote
  #4  
Old 10-09-2014, 08:56 AM
Bruce K's Avatar
Bruce K Bruce K is offline
Peter Pan Oath adherent
 
Join Date: Dec 2003
Posts: 20,176
As said above

Inside with a bash guard or chain keeper ring on the outside yields a better chain line

Keeper on the inside or over the top to prevent drops

BK
__________________
HED Wheel afficianado

Age is a case of mind over matter. If you don't mind, it don't matter.
Reply With Quote
  #5  
Old 10-09-2014, 08:58 AM
Kirk Pacenti Kirk Pacenti is offline
Senior Member
 
Join Date: Sep 2004
Posts: 2,656
Inside w/ guard on the outside, plus a keeper if you're not running a thick thin style ring w/ a clutch RD.

Cheers,
KP
Reply With Quote
  #6  
Old 10-09-2014, 08:59 AM
FastforaSlowGuy FastforaSlowGuy is offline
Senior Member
 
Join Date: Nov 2011
Location: Andover, MA
Posts: 2,030
This makes the most sense to me. The Praxis thing confused me. It seems a lot tougher to get the chain deflector positioned properly if the chain is on the outside, and then you're loosing the drop protection you'd get from the guard.

After yesterday's news that I'll be working through the last road race of the season (on Columbus Day), I've decided to drown my sorrows in CX. I'm sure I'll come very close to killing myself, but a little fun and competition is what's needed right now. I spent last night dialing in the fit, and I think I'll make the 1x leap to simplify things.
Reply With Quote
  #7  
Old 10-09-2014, 09:02 AM
robin3mj robin3mj is offline
Senior Member
 
Join Date: Feb 2009
Posts: 806
What kind of r/d are you using?
If conventional, I would put the ring on the inside, and get a bashguard and dog-fang. BBG makes all BCD/sizes/colors for nice and cheap.

If using a clutch r/d, you can put the narrow-wide ring on the outside and fuhggedaboutit.
Reply With Quote
  #8  
Old 10-09-2014, 09:05 AM
old fat man's Avatar
old fat man old fat man is offline
but not really
 
Join Date: Aug 2005
Posts: 3,998
Quote:
Originally Posted by FastforaSlowGuy View Post
This makes the most sense to me. The Praxis thing confused me. It seems a lot tougher to get the chain deflector positioned properly if the chain is on the outside, and then you're loosing the drop protection you'd get from the guard.

After yesterday's news that I'll be working through the last road race of the season (on Columbus Day), I've decided to drown my sorrows in CX. I'm sure I'll come very close to killing myself, but a little fun and competition is what's needed right now. I spent last night dialing in the fit, and I think I'll make the 1x leap to simplify things.
If you're cutting corners on your 1x setup, you will not simplify things. I've raced cx all over New England with a 2x10 drivetrain for nearly a decade and never had issues nor felt that it was complicating things. Plenty of 1x setups again these days, but you need to do the following at a minimum ATMA

- use a wide/narrow front ring (best thing to do)
- use a clutch type derailleur if possible (X9 or the CX specific ones)
- keep your chain length to a minimum
- if not using a clutch type derailleur, i'd recommend a chain guide of some sort up front for the added security. keep in mind though, if your chain gets stuck with the guide, it'll be even worse than not having a guide
Reply With Quote
  #9  
Old 10-09-2014, 09:34 AM
sandyrs sandyrs is offline
Senior Member
 
Join Date: Mar 2012
Location: Colorado
Posts: 3,736
Racing this weekend?
Reply With Quote
  #10  
Old 10-09-2014, 09:38 AM
FastforaSlowGuy FastforaSlowGuy is offline
Senior Member
 
Join Date: Nov 2011
Location: Andover, MA
Posts: 2,030
Quote:
Originally Posted by sandyrs View Post
Racing this weekend?
A buddy is trying to talk me into doing Lancaster on Saturday. Everything is full except the SS race. I haven't made up my mind on that yet, but I spent $30 to register so I could mull it over in peace. I think I'll get up Saturday morning, see whether I can figure out the dismount/remount thing, and then decide.

Otherwise, I'm definitely going to do a race in Keene, NH next weekend. Looks more technical, so maybe tougher for a first-timer.
Reply With Quote
  #11  
Old 10-09-2014, 03:55 PM
FastforaSlowGuy FastforaSlowGuy is offline
Senior Member
 
Join Date: Nov 2011
Location: Andover, MA
Posts: 2,030
A related stupid question: What do the tooth-size references mean on chainguards (size of the chainring it's replacing, or the max size of the chainring it can guard?), and how closely do I need to match it to the chainring I'm using?
Reply With Quote
  #12  
Old 10-09-2014, 04:06 PM
sandyrs sandyrs is offline
Senior Member
 
Join Date: Mar 2012
Location: Colorado
Posts: 3,736
Quote:
Originally Posted by FastforaSlowGuy View Post
A buddy is trying to talk me into doing Lancaster on Saturday. Everything is full except the SS race. I haven't made up my mind on that yet, but I spent $30 to register so I could mull it over in peace. I think I'll get up Saturday morning, see whether I can figure out the dismount/remount thing, and then decide.

Otherwise, I'm definitely going to do a race in Keene, NH next weekend. Looks more technical, so maybe tougher for a first-timer.
Lancaster is on Sunday!!
Reply With Quote
  #13  
Old 10-09-2014, 04:21 PM
eBAUMANN's Avatar
eBAUMANN eBAUMANN is offline
Imshi Cycles
 
Join Date: Oct 2010
Location: Saxtons River, VT
Posts: 9,631
if you don't have a clutch, adhere to the "WWBBD?" motto.

if you do have a clutch, a wide narrow ring works on either the inside or outside of the spider, though will probably yield a better chain line on the inside, as you will probably use the top end of your cassette more than the bottom in a cx race.

i think a bash guard is unnecessary for clutched wide-narrow drivetrains, and even for non-clutched - see ben's setup for a great example.

bottom line, these days, there is no reason to NOT have a wide narrow ring, they really do make a huge difference.
__________________
For Sale --- Instagram
Reply With Quote
  #14  
Old 10-09-2014, 04:24 PM
zacstanley zacstanley is offline
Senior Member
 
Join Date: Oct 2012
Posts: 923
I'm using a plain ol' Rival RD with no-clutch and a 44t wolf tooth on the outside. Nary a single dropped chain when using wolf tooth's method for chain length.

Zac
Reply With Quote
  #15  
Old 10-09-2014, 04:35 PM
eBAUMANN's Avatar
eBAUMANN eBAUMANN is offline
Imshi Cycles
 
Join Date: Oct 2010
Location: Saxtons River, VT
Posts: 9,631
Quote:
Originally Posted by zacstanley View Post
I'm using a plain ol' Rival RD with no-clutch and a 44t wolf tooth on the outside. Nary a single dropped chain when using wolf tooth's method for chain length.

Zac
fine for general riding when a dropped chain only means a stop and some dirty fingers - in a race however, a dropped chain without a fd to shift it back on is a pretty huge set-back. not to mention if mud is involved...that chain won't be on there for very long.

a clutch/catcher-less setup is possible, and it will work almost all of the time, but its that one time it drops and ruins your race that will have you singing a different tune
__________________
For Sale --- Instagram
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:45 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.