Quote: Originally Posted by KLabs .
... please post a url (link) of where you can get a compatible 36T 7900 inner chain ring. That would be terrific ... thanks
Quote:
Originally Posted by oldbobcat .
You got me looking and I could not find a 7950 36t ring anywhere, even in Shimano.com. For 130 mm you have several options. but with 110 mm 50-34t is all you get.
Once again, what we have here is a failure to communicate ...
To [COLOR= #000000]again quote myself:[/COLOR]
As you can hopefully see, other than being nickel plated, it is just a nothing-special 110BCD inner chainring, so ANY 3/32" 110BCD chainring can be used.
Several years ago, I bought a 37t 110BCD chainring to use on one of my so-called "Compact" cranks ... it was a 3/32" [COLOR= #008000]BMX chainring[/COLOR].
Personally, I would just get any 36t 110BCD 3/32" chainring from eBay ... and, if necessary, paint it.
In fact, you would not want to substitute the 7950 outer chainring with anything other than a 6750 chainring unless it was for dire reasons because any other substitute outer ring would not be "hollow" and would probably be cosmetically unattractive where the chainring meets the spider ...
... please post a url (link) of where you can get a compatible 36T 7900 inner chain ring. That would be terrific ... thanks
Quote:
Originally Posted by oldbobcat .
You got me looking and I could not find a 7950 36t ring anywhere, even in Shimano.com. For 130 mm you have several options. but with 110 mm 50-34t is all you get.
Once again, what we have here is a failure to communicate ...
To [COLOR= #000000]again quote myself:[/COLOR]
- [COLOR= #0000ff]The inner chainring on-or-for a Double crankset is not ramped. So, as far as replacing the inner chainring, the only[/COLOR] thing(s) a person truly needs to be concerned with is the BCD + the cosmetics, with the latter being a trivial matter.
- [COLOR= #ff0000] [/COLOR]Consequently, almost any 3/32" 110BCD chainring ([COLOR= #ff8c00]except Campagnolo's!) will fit on the Compact 7900 crankset.[/COLOR]
As you can hopefully see, other than being nickel plated, it is just a nothing-special 110BCD inner chainring, so ANY 3/32" 110BCD chainring can be used.
Several years ago, I bought a 37t 110BCD chainring to use on one of my so-called "Compact" cranks ... it was a 3/32" [COLOR= #008000]BMX chainring[/COLOR].
Personally, I would just get any 36t 110BCD 3/32" chainring from eBay ... and, if necessary, paint it.
- FYI. WalMart's store-brand FLAT BLACK spray paint doesn't require primer ([COLOR= #808080]99.9% of the time[/COLOR]) and should be durable enough ... buff it if a semi-gloss appearance is preferred.
There is no reason to buy a set of 110BCD chainrings from PRAXIS WORKS when only someone only needs an inner chainring.Originally Posted by oldbobcat .
You can order a 50-36t Shimano-compatible set from Praxis Works, though. http://shop.praxis-works.com/Compact-Road_c4.htm. 36t ring may have been available for 7800-series compacts.
In fact, you would not want to substitute the 7950 outer chainring with anything other than a 6750 chainring unless it was for dire reasons because any other substitute outer ring would not be "hollow" and would probably be cosmetically unattractive where the chainring meets the spider ...
FWIW. The "chain bounce" suggests to me that your rear derailleur cage was possibly too short ... or, of course, the chain bounce might have been due to something else OR simply an unusually rough patch of pavement the last time you recall making the shift between chainrings with the particular crankset.Originally Posted by oldbobcat .
My Felt F5 had 50-36t FSA Gossamer rings. I don't remember if the chain rubbed when I ran 36/11, but I do remember the chain bouncing around so much that I doubted ever getting a clean shift out of that combination..