shimano IG chain

[Kelling]

hi,

i bought a new crank for my old mountain bike, and on the large
chainring it says: "shimano IG chain only"

how critical is this? i don't know what kind of chain it is, but
it's new enough (barely stretched at all going by the 12" link to link
check) that i'd rather not buy a new chain if i don't have to.

is there some simple articulation of what my chain should or should
not look like in order for it to be compatible? or is there
something on my old crank i should look for? my old crank has 'flat'
chainrings - no 'ramps' for quicker shifting. the new cranks'
chainrings have these 'ramps'. the chain came off of a bike with
'ramps' and worked fine as far as i know.

is the IG refering to those 'ramps'?

thanks,

david

[Ryan Cousineau]

In article <5dcc62a7.03051...@posting.google.com>,
confl...@comcast.net (Kelling) wrote:

Ah Interactive Glide, we harly knew ye.

IG was a successor to Hyperglide, with ramp cuts on both sides of the
sprocket:

http://www.sheldonbrown.com/k7.html#interactive

IG has quietly disappeared from the current offerings, but for most
puposes, it is compatible with HG stuff, and by extension with most
current aftermarket chains (SRAM, Taya, etc.).

I wouldn't worry about it; as long as you have a Hyperglide cassette
now, your front shifting should be fine.

--
Ryan Cousineau, rcou...@sfu.ca http://www.sfu.ca/~rcousine
President, Fabrizio Mazzoleni Fan Club

[g.daniels]

i called shimano(all the tele numbers are around somewhere) and shim
was most pleased to answer questions
this was prior to buying several IG chains at deep discounts
shim said: IG chains work ok with HG rear clusters and 5-6-7-8 speed
chain rings and that's what I found with 3000 mile chain replacments
with two removable sachs/sram link replacements at 1500 miles(see the
little hole appear as the link wears out-replace removables in the as
removed position)
No accelerated wear on other components was observed(or objected to).
Shim said that the problem was using HG chain with an IG chain
ring-that the IG chain ring ramps did not match up to the HG chain
design and wear or disapproval might occur.

[kh6...@pe.net]

Kelling <confl...@comcast.net> wrote:
: hi,

: i bought a new crank for my old mountain bike, and on the large
: chainring it says: "shimano IG chain only"

: how critical is this? i don't know what kind of chain it is, but
: it's new enough (barely stretched at all going by the 12" link to link
: check) that i'd rather not buy a new chain if i don't have to.

IG front rings don't care what chain is on them. They work fine.
I use a cheap pc48 Sram chain (10.00) on my old Trek 930 with STX
IG rings and it works fine.

--------------------------------
Bob Masse' kh6...@PE.NET
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