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The problem might be a combination of the chainring and the crank spider.
It's likely to help by rotating the chainring relative to the spider, i.e. take the chainring off, noting where it was. Then rotate it forwards by two arms, and try again. If nothing else, it will move the slack spot to somewhere else, so it won't be at all obvious when you're trackstanding.
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This is the first I've heard of Witcomb's new marketing direction... it's a pity, I liked their old time-warp vibe. I nearly had a frame made last summer, but I was finding it impossible get them to find time to measure me up so I put it on hold. They didn't exactly seem short on business, the problem was they couldn't hold onto staff.
How big is the price hike, roughly?
haha[/quote]
I used one of these for a while. I convinced myself if was safe (cos I was too tight to buy a crank puller).
It sort of worked, as long as the tension was meticulously maintained.
Then a near-death experience crossing Farringdon Rd at 25mph finally persuaded me that, in reality, Biopace and fixed are a terrible idea.