On 02/07/2016 11:13 AM, William deRosset wrote:
Dear Joe,
The helicopter tape stick-on ones work okay for road use. They'll
eventually get torn up, and, once chipped up, are difficult to remove
cleanly. Eric has the very best approach--chrome or stainless socks
and a rubber chain slap-strap, but you gotta be thinking ahead (i.e.
work with your builder/painter and chromer) for that solution. Don't
ask Grant for chrome.
Or avoid the chain-slap problem entirely: In increasing order of
hassle: A clutch-type ("type 2") rear derailleur basically eliminates
chain slap (and, more critically, really limits the opportunity for
chain suck) in my experience--it is a blessing if you're riding modern
derailleur gears off-road. HOwever, it comes at the expense of modern
rear mtb derailleurs, which tend to have an industrial look. A rohloff
or similar eliminates the slack necessary for chain-slap, even with a
chain tensioner. Or you can have a Nivex fabricated. They reportedly
have enough spring tension to limit chain slap.
Of course, the /real/ reason you need a chainstay protector isn't chain
slap due to tension issues at all, it's what happens when you drop the
chain off the chain rings and it drags across the chainstay, scraping it
up. And a fancy rear derailleur isn't going to cure that (although an
IGH probably will).
--
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