I'm not sure how solid the tensioning woujld be but to run different cog the singulator is good, allows movement side to side so more than one cog can be used and allows a straight chainline.
http://www.surlybikes.com/parts/popu...Singleator.jpg

I think that's the one I have but it drops chain carvin' over tracks, I can't imagine running roughy in the muck and bumps with it, it would drive me mad it would. I think it needs a spring from a Chevy.

Nice! This is what I wrote about it... I sent it to the editor although there are things about what I wrote that I'm sure will cause it not to be taken seriously. I can live with that, though. :)

Linky

What about a chainring tensioner, like DH riders use?
Or go for the bling and run the Paul tensioner. Chain runs through like a rear der.
http://ucycle.com/images/312.jpg
Of course runs $120 at urbane.

hmm only 100$ more than my tensioner..and mine moves back and forth to do the chainline with multicogs... I wonder if it's a case of you get what you pay for? I wonder about the DH style off the chainring, a combo of both just might do it.

Just read an MTB forum post about using non-ramped chain rings being the secret...this unfortunately isn't possible just yet.

So true. We have about 100 cyclist door prizes per year in GTA and I'm adding my vote that motorist/motorist door prizes are rare to non-existent; never heard of it in my 20 years in this city (and I'm also a motorist at times).

I guess the door prize is a natural consequence of the cyclist being legallly entitled to take the lane as required for safety, but rarely acting on that entitlement. Motorists are always in the main lane, they rarely get so close to parked cars

Re the skinny streets: As you note, the motorist refuses the enter the door prize zone on their own side of the street. What that often does, in my observation, is shift that risk onto an oncoming cyclist on the opposite side of the street! because the motorist is basically running straight down the centreline of the street. The sense of entitlement never ceases to amaze me.

I think this is a great question for motorists to respond to. Thanks for your efforts re the Star.

I try to ride the line between the two lanes generally but, like you said, it's not always possible. I do find myself in the doorzone ALOT. I've practiced seeing folks in their cars, but I've spooked a couple times this year.

So in the vein of taking the lane for SAFETY sake ..... if the curb lane with parking is now changed to accidentally running into an open being door into traffic where you then get run over, I suppose taking the centre lane should conceivably alright. Just quote the story and completely aviod the curb lane when cars are there. This applies to all of Queen and King with the exception of rush hour when no parking is allowed. I wonder how that will fly in the core?

I'd like to know why a lot of motorists can't seem to stick to their lanes, either - more often than I care to remember I've been buzzed by or witness cars that straddle the 1/3 curb lane by the parked cars and 2/3 of the left lane for no apparent reason - I've been forced to the curb in a pretty violent way when one cab tried to take that 'lane' on Danforth, too. I had to yell at a driver yesterday who was driving half/half, and at the time (rush hour eastbound traffic) there were a bunch of cyclists around me, which I was passing all in the curb lane - this idiot was trying to overtake, but didn't have anywhere near enough room so was tailgating the truck/trailer while half/half. My yell was a "respect your effing lane markings, a-hole" - not perhaps the most diplomatic thing to say I admit.

tell him it's Lane Straddling .. 150 bones and 2 demerit points.
Thing that drives me bonkers is the drivers' weird need to be three and a half feet from the streetcar... it's not gonna move buddy you can get closer you know. Or that the fact that if in the centre lane the drivers' side tire should be on or to the left of the track. They all seem to think if they get close the the lane divider they will lose the left side of their vehicles, despite the fact that the streetcar fits in the lane.

fwiw #1: that's close to how I remember it being worded on CP24 this morning, so they don't *all* have their heads up their arses.

fwiw #2: I've nearly taken off a couple people's doors that were flung open into my path while driving. I'm not a curb hugger, either, I drive with my car's wheels to the LEFT of the tracks most of the time. :) Both instances it was giant SUVs poorly parked on narrow streets.

Tell the story like it is I says ;)

Others may argue, but I'm 110% on the non ramped chainring/cog setup for s/s. Never had a chain jump since going this route. With ramped had chain throw one more than once.

Then to the crank switch it is, rampless crank ring here I come. As well to find the 20-something cogs. Then I should be set to get dirty DSR style.

Misfit Psycles is your friend. Or spend a bit more and get the fancy ones

Damn you Chris... eno DOS freewheel...yumm 30 buk per single cog... not ******** all things considered.

Australia sounds scary to ride in.. there's a bunch of letters to Cycling News responding about the road rage incident there from a couple weeks ago: http://www.cyclingnews.com/letters.p...8/05-23letters

Also, re rings/cogs: on my Roger I'm running Blackspire non-ramped rings (one 42t DH ring, one 38t mono-veloce) up front, and a 20t WTB ss cog + an unknown-brand 16t ss cog (can't remember what.. from Cycle Therapy) out back. Of course, I also have track-style dropouts, so I can tension the chain properly. I've been happy with it all, however, and none of it was very pricey.

I have the $4 cog from them, works fine for me. Yeah Dos freewheel is nice, match it up with the $225 crank and you're good to go.

I'm thinkin it'll go with my mismatched crank currently on the Pake when I swap that out for the DA/octi.
Then I can rampless ring it , as opposed to fighting with the XT stuff.

I'm trying to decide if I should get this frame.
http://bikeisland.com/images/26oc2.jpg
$120US. All I would need is a headset. Hmmmm.....decisions to make.

k, I think the guys @ Racer Sportif are f*****g with me. I went in to ask about building up a fixie, and they said your fixed crankset has to have a 144 BCD in order to work as a fixie/with a 1/8 chain... I did some searching on BF and it sounds like most people are running 130 BCD converted 'road' cranks. What's the deal here?

144 bcd is the track standard, so chainrings of that size usually come in 1/8 width. Many people (myself included) with conversions use their existing 130 bcd road double crank + chainring in 3/32.. there are lots of 3/32 cogs to select from, so the entire drivetrain can be 3/32.

ok, so you can safely ride a FG on a 3/32 chain with a 130bcd? The guy I talked to said it had to be done with a 144bcd or something... maybe I was just getting confused.

100% Safe.

Seriously, go somewhere else!

Agreed.

Cupcrazy4: all my fixed gear bikes are/were 130bcd 3/32 chain setup. Before the RPM crank I used an older shimano crank that had biopace rings on it. Pretty much any road crank will work for a fixed gear. With all the bike shop people on this T.O. thread I would go to one of their shops to get stuff you need. Cycle Therapy, Cycle Solutions on Parlament, Curbside, La Carrera, Urbane, amongst others. Never ever had a problem dealing with these places.

So dirty singletrack folk - anyone still up for riding Kelso on Sunday morning?