Wednesday, October 04, 2006
Question from the readers to the readers..Singlering advice
I get a lot of emails about cyclocross (I love it dont get me wrong) but I thought, Id pose this reader question to the World Wide Web of Plus One Lap readers. As well as posting my response.
"I've recently re-set up my c-cross bike, and i have a single chain ring up front, but when i ride it hard, over logs or curbs
(as it is used for commuting too), my chain pops off. a friend of mine recommended
just putting on a front dérailleur to keep the chain on, but i am having a hard time 'adjusting' the dérailleur to deal with the nine speeds in the back. is there anything i am able to put on in place of a dérailleur to keep the chain on that is not some freaking down hill thing?
thanks for your help
This is very common. There are several options to hold the chain on in the front (Chain ring guard with a Deda Dog Fang or NGear Jumpstop; an old Front Derailleur or 2 chainguards that go on each side of the chainring, and maybe others?)
I have used, the Dog Fang, NGear, and a Rohloff Chainguide that looks basically like an old front derailleur but it costs like $50. I have never used double chainguards. What I have used didnt work. Not well enough at least.
With the fake front derailleur option, the chain will rub on the derailleur no matter what on one of the extremes, and if you space out the derailleur by bending it, there will be enough space for the chain to slip past it. With the Dog Fang or Jumpstop I still had a problem with the chain bouncing off, even after I shortened my chain to the right length.
Maybe the dual chainguard is the solution that works? The funny thing is, the single chainring has a myth that its the chaindrop solution, but I've known more people to drop chain with a single ring than with a double.
You could always, rig up the front derailleur and have a shifter going to it, but only having one chainring. That way, you could adjust the rub, but still have just the one ring. But if you're going to do that, why not toss on another chainring and double the amount of gears you have?
So my answer? Try double chainring guards, shorten the chain, perhaps running a chain tensioner in addition to the derailleur might help (like the Kore tensioner or the Dimension tensioner posted above) or do like I did and go either double ring or Singlespeed.
Does anyone have a better idea?
at 1:42 PM