I used to run a 3/32" drive train (chain, chain wheel, cog) when I ran Sugino 75s. When I switched to a 1/8" ZEN chain wheel, I just got a 1/8" KMC K710 chain and kept the 3/32" Surly Cog. My Park Tool SR-1 3/32" chain whip worked great.
Then I switched to an all 1/8" drive train (Dura Ace 7710 Cranks, 1/8" DA chain wheel, a Phil Wood 1/8" cog, and a KMC K710 1/8" chain. That 3/32" chain whip didn't work anymore on that 1/8" cog.
The SR-1 packaging doesn't mention that it only works for 3/32" (are you listening Park Tool?) So I decided to convert the 3/32" Chainwhip to 1/8". It's sort of easier said than done. But, it's not that hard.
Why is the chainwhip 3/32" instead of 1/8" when 1/8" is larger and will work for both, you ask? Well, 1/8" won't fit between cogs on a casette. And cassettes are all 3/32" (that I know of). But, SS and FG don't have that problem.
Parts needed:
- Park Tool SR-1 Chain Whip - $0 (MSRP around $20)
- 3 1/8" Master Links = $6 (3 x $2) *Make sure that they are 1/8", pins on 3/32" master links are too short.
- 12 links of an old 1/8" chain = $0 (Old worn out chain)
Tools needed:
- Chain Breaker
- Pliars
With the Donor Chain:
1: Break the donor chain into the proper lengths. Note that you will need to break the donor chain into lengths equal to the chain you are replacing keeping in mind that you will use the 3 master links to connect to the lever bar.
With the Chain Whip:
1: Take the pliars and twist the base of the long chain part of chain whip to twist and break the links off of the pin bolting it to the lever. This takes a small bit of effort.
2: Use the chain breaker to push out one of the pins in middle of the short chain part dividing it in two. Then twist the links to break them off of the pins linking them to the arm.
3: Re-assemble as shown using donor chain and master links.
Now I have a chain whip to work on 1/8" AND 3/32" and it only cost me $6 and about 20 minutes of effort.
(And before you do it, please don't start another rotofixa debate....PLEASE. That horse was beaten to death a long time ago)