Well here's about the best article I found on the many possibilities of why
his chain flew off the big ring going over such a relatively small bump.
The bottom line is that nobody knows. "Stuff happens".
My best guess is a wonky chainline part, as his model of bike is not spec'd
as being
On Wednesday, 31 May 2023 at 11:23:36 am UTC+10 Garth wrote:
I was watching the uphill penultimate TT road racing stage of the Giro D'
Italia this weekend where the eventual winner Primoz Roglic chose to run a
1x for his TT bike. The announcers were "praising" him for the "innovative"
choice
On Wednesday, May 31, 2023 at 12:57:57 PM UTC-5 lconley wrote:
Larger diameter cogs and chainrings have less friction because the chain
does not bend/wrap as much. Not sure how the angle between the front and
rear impacts the overall friction. But lets say you have two single speed
bikes - one
Larger diameter cogs and chainrings have less friction because the chain
does not bend/wrap as much. Not sure how the angle between the front and
rear impacts the overall friction. But lets say you have two single speed
bikes - one is a 52-26 and the other is a 26-13 - same gear ratio. The
Patrick, Drew and everyone, Eurosport said it was a 44t chainring with a
"pie plate" cassette" during the live broadcast, you can see it here :
That 9 speed is very close to the home-brew 10 I'm using; simply add an
outer 13 and 10 speed cogs, tho mine goes 19-20-22-25; the difference is
minor. I'll have to remember that particular cassette.
On Wed, May 31, 2023 at 10:47 AM Ken Yokanovich <
reflector.collec...@gmail.com> wrote:
> I am a
I am a big fan of the Shimano HG50 14-25 9 speed cassettes:
(14-15-16-17-18-19-21-23-25T) paired with a 42T ring for a 1x drivetrain or
44/30 2x drivetrain
On Saturday, May 20, 2023 at 12:55:27 PM UTC-5 Ted Durant wrote:
> Hi All -
>
> Leah's "Getting Over My Head" thread seems to have
Thanks, Drew. I watched the Twitter video; pretty steep even with a 1:1!
I looked for a clip of Coppi or Bartali climbing similar cols in their 46 X
19 or whatever low gears were back then (someone told me but I can't find
the email now) but couldn't find one in the first 5 minutes, so gave up.
This
article:
https://road.cc/content/tech-news/primoz-roglic-uses-gravel-gearing-decisive-giro-tt-301511
Says he used the "XPLR-1271" from SRAM, which only offers a 10-44
(10,11,13,15,17,19,21,24,28,32,38,44) cassette, with even chainrings
between 38 through 46, most likely a 44. I don't know
Garth: Do you by any chance know what cog combination or what a typical cog
combination would be for such a climb by a pro? I'll be he didn't use a 52
t inner cog and that he had a pretty close spread in the center of the
cassette, but would be happy to be proved right or wrong by evidence.
As to
I was watching the uphill penultimate TT road racing stage of the Giro D'
Italia this weekend where the eventual winner Primoz Roglic chose to run a
1x for his TT bike. The announcers were "praising" him for the
"innovative" choice of using a mtb gearing setup for the TT. Well lo and
behold,
I agree with Ted on the problem of getting Ideal Cog Teeth & first cogs
being too small (11T & less) , but I believe a 46-36-26 triple with a wide
range Shimano HG-400 12-36 9 speed cassette (Deore RD-M591-SGS), 130mm OLD
Tiagra 4000 rear hub, and 650Bx38's gives me:
good gearing in my cruising
Thanks a bunch, Ted. It's very helpful. What you say here is pretty much
the way I've set things up on my bikes and I've enjoyed riding them with
gearing like this.
On Saturday, May 20, 2023 at 12:55:27 PM UTC-5 Ted Durant wrote:
> Hi All -
>
> Leah's "Getting Over My Head" thread seems to
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