mgilman
04-16-04, 01:38 PM
how can you run two different sized cogs on the hub?if you flip it to the other side wouldnt you have to either lengthen or shorten the chain as needed?
Singlespeed & Fixed Gear - if you use a flip flop hub,
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hair07
04-16-04, 01:48 PM
this is a good point and something i hadn't thought of before. i think the difference in rear cogs is usually pretty small; let's say 2 teeth. i guess w/ horizontal dropouts, you probably have enough play in the chain so that you can switch between the 2 gears. at least i think you'd have to set it up as such. does that make sense/work?
dan
dan
roadfix
04-16-04, 01:59 PM
With horizontal or semi-horizontal dropouts you'll have enough room for adjustment which actually isn't that much with a 2 teeth cog difference, for instance. No need to alter chain length.
riderx
04-16-04, 02:05 PM
how can you run two different sized cogs on the hub?if you flip it to the other side wouldnt you have to either lengthen or shorten the chain as needed?My dropouts on my Crosscheck are long enought that I flip-flop from a 42x17 (road and fire road) to 42x21 (singletrack) without having to shorten or lengthen my chain. In fact, I could probably go one or two teeth smaller and still have it work. I believe the rule is 1 tooth changes chain length by 1/8 inch.
singlespeed
04-16-04, 04:08 PM
I run a 52 front with a 17 fixed and a 15 freewheel. There are no problems with it as far as chain length. That is on an old Schwinn LeTour.. Great horizontal dropouts.. I have always been told that the rule of thumb was a two tooth difference was about the most you were going to get.
riderx- that is pretty amazing that there is that much room in there to be able to switch and use a four tooth difference!
riderx- that is pretty amazing that there is that much room in there to be able to switch and use a four tooth difference!
kurremkarm
04-17-04, 02:44 AM
I run a 52 front with a 17 fixed and a 15 freewheel. There are no problems with it as far as chain length. That is on an old Schwinn LeTour.. Great horizontal dropouts.. I have always been told that the rule of thumb was a two tooth difference was about the most you were going to get.
riderx- that is pretty amazing that there is that much room in there to be able to switch and use a four tooth difference!
I have a 52 front with a 21 in the back, fixed, guess we know which of us isn't a wimp :P
riderx- that is pretty amazing that there is that much room in there to be able to switch and use a four tooth difference!
I have a 52 front with a 21 in the back, fixed, guess we know which of us isn't a wimp :P
fixedgearhead
04-17-04, 06:34 AM
how can you run two different sized cogs on the hub?if you flip it to the other side wouldnt you have to either lengthen or shorten the chain as needed?
In all the years of running a flip flop hubs(10), I have only reversed the hubs twice. That was to see if the chain would still allow the other cog to fit on the sloping dropouts, and once on a tour thru the Colorado Rockies. I think that the use of a flip flop is totally unnecessary unless you ride in "Extremely" steep terrain. Just suck it up and stand up and peddle. It is more trouble to stop and reverse the wheel for a short uphill section of road. Now a "long" uphill is another matter. By long, I mean over 1 mile or more. Yhen it would make sense.IMHO.
fixedgearhead
In all the years of running a flip flop hubs(10), I have only reversed the hubs twice. That was to see if the chain would still allow the other cog to fit on the sloping dropouts, and once on a tour thru the Colorado Rockies. I think that the use of a flip flop is totally unnecessary unless you ride in "Extremely" steep terrain. Just suck it up and stand up and peddle. It is more trouble to stop and reverse the wheel for a short uphill section of road. Now a "long" uphill is another matter. By long, I mean over 1 mile or more. Yhen it would make sense.IMHO.
fixedgearhead
shecky
04-17-04, 11:48 AM
My old coaster brake equipped MTB has seen cog diferences from 12t to18t without needing to alter the chain. There's about 1.5" of useable horizontal adjustment on those dropouts.
singlespeed
04-17-04, 12:02 PM
Holy chihuahua! that is a lot of room that you guys seem to have in your dropouts. I thought that I had a lot on my old Schwinns, but not nearly that much room to change up!
The nice part is that the closest thing that we seem to have around here in the city to a hill are the over passes that go over the highways! So running bigger gears is pretty easy around here:)
The nice part is that the closest thing that we seem to have around here in the city to a hill are the over passes that go over the highways! So running bigger gears is pretty easy around here:)
SchreiberBike
04-17-04, 12:18 PM
The nice part is that the closest thing that we seem to have around here in the city to a hill are the over passes that go over the highways! So running bigger gears is pretty easy around here:)
Yeah, but there are also those hour long rides into a 20 mile wind at 10 miles per hour, then you have to almost coast back, because I can't spin 150 for the 30 minutes it takes to get home. (rough numbers) I've been thinking about a flip/flop for wind purposes.
Yeah, but there are also those hour long rides into a 20 mile wind at 10 miles per hour, then you have to almost coast back, because I can't spin 150 for the 30 minutes it takes to get home. (rough numbers) I've been thinking about a flip/flop for wind purposes.