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Wheels Mfg. Accelerator cassette(2 posts)

Wheels Mfg. Accelerator cassetteKyle
Feb 21, 2002 8:44 AM
For about two years now, I've been riding a bike with all Campy except for a D/A rear hub,Ultegra cassette, and SRAM chain.

The setup works surprisingly well as long as you keep it lubed and I haven't seen any real problems.

Okay, I know, if it ain't broke don't fix it. But for some reason this bugs me. I'm guessing (imagining?) that I'm getting sub-optimal shifting, chain and cog wear, etc.

I figured I'd use this as an excuse to get a trick new set of Campy wheels & a new cassette but found that they don't build a 12-27, which I've come to like.

So (finally) my question. Would an Accelerator cassette/Campy chain do anything for me other than give me a psychological boost?

correct spacing...C-40
Feb 21, 2002 9:23 AM
The Accelerator cassette has the correct cog spacing. It's bound to improve the shifting.

The stock shimano cog spacing is 4.32mm compared to campy's 4.55mm. The difference in 5% per shift. To get the best shifting the derailleur should be centered on the middle cog to keep the misalignment to a minimum. It will still accumulate to 20% after four shifts. If the derailleur is adjusted to the first cog, the misalignment would accumulate to 40% on the 8th shift.