Re: Best chain for Nexus hub gears?
- From: Werehatrack <rault00@xxxxxxxxxxxxxxxxxx>
- Date: Fri, 30 Nov 2007 11:28:10 -0600
On Fri, 30 Nov 2007 07:16:13 -0800 (PST), fiultra@xxxxxxxxx may have
said:
Gentlemen:
I'm looking for a replacement chain for my Trek L700 Navigator
"Smover", which is fitted with Cyber Nexus electronic automatic gears.
The chain that came on the bike is SRAM PC10. A 1/2x3/32in chain is
required.
At the same time as fitting the new chain I want to fit a Hebie
Chainglider, which replaces a full chaincase with a clip-on plastic
runner which fits over the chain without any additional support, so
the chain should not be closed with a clip that adds to the width; max
chain width inside the Hebie Chainglider is 9mm.
Here is a list of 7 and 8 speed chains that may or may not be suitable
but are available at my mailorder dealer (www.chainreactioncycles.com
-- they offer free carriage to where I live):
Wippermann:
ConneX 808 8sp nickel plate
IntraX 708 nickel plate
IntraX 7Z1 galvanized
KMC:
X8 93 8sp
Shimano:
HG 50 7sp
HG 70 7sp
HG 90 7sp
HG 91 7sp
IG 70 8sp
SRAM:
PC 1 Nickel Single Speed
PC 68 8sp
PC 850 8sp
PC 870 8sp nickel
PC 890 8sp
Which should I cross off my list as unsuitable or unwanted?
***Of the remainder, which is the best?***
To me at present the IntraX 708 nickel and 7Z1 galvanized look
attractive on the Wippermann reputation, on price and on spec but the
truth is that I do about a thousand miles a year, so the price doesn't
matter as long as whichever chain I fit lasts a year or two. Is there
any advantage, in perhaps smoothness, in the nickel rather than the
galvanized chain? Or should I, since i live in Ireland, where it can
be pretty damp, choose the galvanized chain on principle?
My recommendation would be the SRAM PC-1 Nickel for the simple reason
that I would expect it to last a bit longer. SRAM's snaplinks do not
use a clip, nor do some of those from Wipperman (The Intrax 7Z1
information I have seen states that it is supplied with a link that is
secured with a snap clip, but I have not actually used one; this
should be checked before ordering that chain.) All of the KMC
multi-speed chain snaplinks I have seen are "clipless" as well.
Shimano, on the other hand, does not use nor offer a snaplink;
installation of their chains requires the use of a chain-breaking
tool, and the expenditure of a non-reusable pin each time the chain is
mounted. The SRAM PC-1 will be slightly wider than the multi-speed
chains, with slightly wider internal load-bearing surfaces in the
bargain. Since you have no need for the narrowest chains (they're
designed to accomodate the requirements of derailleur systems), the
slightly beefier single-speed chain would appear to be the more
rational choice. Additionally, the SRAM PC-1 chain has what is, in my
opinion, the most easily connected link of the entire bunch; a little
side flex of the chain is all that's needed to allow slipping the
loose side plate onto the pins of the other half.
If the Intrax chain's connector link is not too wide to use with the
Chainglider, I would probably put it equal with the SRAM in
suitability, with all of the other Wippermann and SRAM chains and the
KMC you mentioned just behind those two, and the Shimano chains last
due to the requirement for a tool and expendable pin for installation.
Make sure that your front sprocket is of the size (tooth count) that
is compatible with the Chainglider before you place your order.
With the setup you are running, I would expect chain life to be quite
long.
--
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