Old 07-17-15, 08:31 AM
  #17  
ThermionicScott 
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Join Date: Aug 2011
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Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)

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Originally Posted by spectastic
I've just got my alfine 8 built up, and have just realized what a royal pain in the ass it is to get the lock ring in there for the rear sprocket. I thought I could be on a tour, encounter a mountain, and easily swap out the rear with a 20t or 22t to get my lowest gear ratio equivalent to a 34/28. NOT SO!!

So I'm taking a new approach. the crankset I'm using is a triple. I currently have a 1/8" ss chainring in the middle. I'm wondering if I can put another 1/8" chainring on the inner bolts to make a double. I'm not going to bother with putting in a front shifter. The small chain ring is only there for the steepest climbs. When that happens, I can just jump off my bike, align the chain on the smaller ring, and pedal on.

I'm a little worried about chain offset on my single speed chain. I'm guessing this won't be a big deal, but double checking.

Also, I will be running a spring tensioner on the bike, and the jump from the big ring to the small ring might be a lot for the tensioner to handle. I'm running 46t on the front. Can I run a 36t on the inner ring? or even 32?
By my math, if you have it set up with a 46/20 (same low gear as 34/28), then your top gear will be around 99" which has always been enough for me on tour. How about skipping the complicated setup and putting on the 20T now?
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