Ozark Bicycle wrote:
> W.S. Armstrong wrote:
>
> > I am about to order a new road bike that comes with a 10-speed
> > Shimano 105 drive train components: 50-39-30T chainrings, 12-27T
> > cassette, front derailleur, rear derailleur with long cage, and STI
> > shift levers.
> > I would like to replace the 30T inner chainring with a smaller
> > one, preferably a 24T. Is this a compatible modification? I
> > recognize that it may not shift up to the middle chainring as smoothly
> > as stock, but as long as it gets the job done I would be satisfied.
> > To me, this is a deal breaker -- if I can't get a 24 inch low gear, I
> > will have to select a different bike.
>
> The 24 to 39 and 39 to 24 shift is "iffy" with an STI front shifter,
> IME.
>
> OTOH, 105 RD will clear a 30T cog, that and a 28T inner will give you
> a "25 inch" gear.
>
> Another alternative is using a friction shifter for the front (barend,
> DT, 'traditional' Campy Ergo). Then, you can do as you wish....
I have ridden a bike with 54/44/24 chainrings and 8-speed chain, and
shifting was acceptable using a bar-end shifter.
--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful