I wouldn't consider any bike where you can change the gears WHILE RIDING to be a single speed. This is obviously not the case here. But with a three-gear hub where you can shift and change the gear ratio while riding, that is not a single-speed for obvious reasons.
And wether or not people consider a double/double and single speed, and what the point is.... I can say I can only do flat centuies on a dedicated single speed but having a double lets me do more and varried rides. I use my taller gear 99% of the time, but on my last century there was a 800ft climb and I swapped the gear to the easier one. I would have had to have walked in my clipless carbon soled road shoes with LOOK style cleats up a big hill.... not ideal.
Last edited by Hirohsima; 05-01-09 at 01:03 PM.
I've got one on a flip flop setup. DOS on one side, fixed on the other. I find myself riding fixed about as much as free, the fixed and one of the gears on the DOS are the same size, and I have a lower free gear for pulling my 1.5 year old son around in the trailer. Perfect setup. I'm running a 1/8" chain right now until I can get a 3/32 cog. There doesn't seem to be any prob with the 1/8" though so far. Bottom line, great product, freewheel is loud as hell (reminds me of those Mavic freehub bodies, but cleaner somehow), I expect it to last a long long time.
Just to confirm, a 1/8 chain will work with on both gears of the White Industry DOS freewheel?
“Life is like riding a bicycle. To keep your balance you must keep moving” - Albert Einstein
White Industries recommends a 3/32 8-speed chain on their website....
....Used, but not used up....
1/8" chains tend to like pretty good chainlines. 3/32" chains don't care.
Steel quick releases work fine with FG and SS. Around 1990 or so it became relatively common for track racers to change gears several times during a workout. Rather than change cogs, some fellows just made up three or four wheels, each with a different cog, and added quick releases. I saw world class kilo riders do full power standing starts with quick release wheels, and never saw anybody pull a wheel.
I have a couple of two speed freewheels made in the 20's or 30's. I also have some three and four speed ones, in addition to the dozen or so 5, 6, and 7 speed ones from relatively modern times. I am looking forward to the continuing technological progression today's fixie riders are enjoying. I note that Retro-Directe was "invented" a few years back. At this rate I expect someone to invent a Cambio Corsa or Margherita/Osgear derailleur system within the next two years. Downtube levers cannot be much farther behind. Y'all will be shifting with your brake levers (still not connected to any brakes, of course) before the decade is out!
You'll want to use 3/32" chain, 1/8" likes to rub on the larger cog when you're using the small cog.
Introduces too many decisions and defeats my purpose for riding fixed or ss. I have 20 gears to play with on my other 2 bikes. To me it's not just minimal gears, it's factoring out the gear changing option
I note Sturmey-Archer has reintroduced the three-speed fixed gear internally geared hub. I may be the last fixed gear rider on the planet to be aware of this, but it's still very interesting to me. And throws another wrench into the "what counts" discussion.
I would like to ask for you advice, if it is possible.
I have a spare road frame and want to convert it to my first single speed with eno eccentric hub. Because I am not sure which size of freewheel will fit me ( I live in pretty flat city of St. Petersburg, Russia but we do have strong winds because of the wide streets and a lot of water), I was thinking of trying dos eno. It seems like a good idea, so I can try 17/19 with 48 tooths crank.
So my question is about chainline.
Eno eccentric hub which I am getting has 47.5 chainline and a crank
Fsa gimondi has chainline 45mm with Recommend bottom bracket axle length: 110.5mm.
Is the chainline same (47.5) with dos eno? Or more precisely, the chainline is different for each cog but would be okay to run it with 45mm crank? Does this difference matter if I use 3/32" chain?
For summary here is list of my test setup:
FSA GIMONDI crank
Shimano un55 bb 110mm
Eno eccentric hub
Dos eno 17/19 freewheel
For 700x25 wheels, I get
frontrear 16 17 18 19 20 22
48 79.4 74.7 70.6 66.9 63.5 57.7
I read somewhere that 70 is a good average, so 66 and 74 seem like good values to try.
A more general question would be:
Is this all worth to bother? Maybe I can just stick with normal 18 freewheel? But people seem to recommend WI freewheels and DOS is just 20$ more than normal WI freewheel? I could simply buy two different cheap freewheels to test, but on other hand I would like to build a bike that will last a long time. If the chainline is not a big issue with DOS, I willing to give it a try.
Thank you in advance.
Hope to hear your advice.