How many cogs of each can you should you use?

Lou,

are spoke mounted discs for big cog loss or seat post Deva's for small CR overshoot uncool in Yurp ?

a small disc for small cog ? haven't seen one...is the cog drill and tap able ?

why no electrick shift on the Mtns ?

On Sunday, June 8, 2014 1:12:46 AM UTC+2, wrote:
Lou,



are spoke mounted discs for big cog loss or seat post Deva's for small CR overshoot uncool in Yurp ?



a small disc for small cog ? haven't seen one...is the cog drill and tap able ?



why no electrick shift on the Mtns ?

Yeah large discs for big cog loss is really uncool in Europe. You only see those on cheap department store bikes. If the limit screws are correctly adjusted you don't need it. Those nifty thingies to prevent chain drop onto your bottom bracket are wise IMO especially on CF bikes. That can happen even if everything is adjusted correctly.
Di2 is on my cross bike. It has 46/36 and 12-32 gearing. My triple equipped road bike has a wide range and is lighter. I think I gonna need that for the Stelvio, Gavia and Mortirolo.

Lou

On Saturday, June 7, 2014 11:44:42 PM UTC+2, Frank Krygowski wrote:
On 6/7/2014 11:46 AM, Lou Holtman wrote:





True. At the end of this month we plan to cross the Alpes.

For that I mounted a 10 speed 12-30 cassette on my triple equipped bike.

Since this is at the edge of my medium caged RD I test rode it first

yesterday in the Dutch 'mountains'. I had to ride 110 km to get 1650

meters elevation gain but enough steep hills to test all my gears.

On the small chainring (30T) the three smallest cogs shift very sloppy.

On the big chainring the three largest cogs tend to overshift and at

one time the the chain fell of the big cog and went on again in a bumpy

corner. In the middle ring (42T) it all went well what makes this cassette

a real nice one on the flats. I can stay in the middle ring all the time

although 42/12 doesn't sound/feel nice.



Our most extreme chain angles happen on our Bike Fridays. Because of

the 20" wheels, we normally ride on the big chainring; otherwise we'd be

putting lots of wear on the tiniest rear cogs. And those special 9 and

10 tooth rear cogs feel pretty rough, anyway.



When downshifting for a hill, we could move to the middle chainring, and

often we do that. But from time to time, we'll be in the big ring and

the big rear cog. I think that's part of the reason the shifting is

sometimes not perfect. There have been times I've been glad to have

bar-end shifters with a friction option.



BTW, my wife's Friday was shifting badly last week. It appeared the

rear derailleur hanger was a bit bent, so I removed the derailleur and

straightened the hanger. Upon reassembly, I had to play with the "B"

screw quite a while to prevent the derailleur body from scraping on the

chainstay! (The chainstay and seatstay on these bikes is one tube, bent

into a sort of "U" shape.)



--

- Frank Krygowski

A 9 and 10T cog? How is that gonna fit on a free hub body? I test rode a couple of folders and they were all terrible. I gave up on them. I rent a bike when traveling by air.


Lou

Lou Holtman writes:

On Saturday, June 7, 2014 11:44:42 PM UTC+2, Frank Krygowski wrote:
On 6/7/2014 11:46 AM, Lou Holtman wrote:





True. At the end of this month we plan to cross the Alpes.

For that I mounted a 10 speed 12-30 cassette on my triple equipped bike.

Since this is at the edge of my medium caged RD I test rode it first

yesterday in the Dutch 'mountains'. I had to ride 110 km to get 1650

meters elevation gain but enough steep hills to test all my gears.

On the small chainring (30T) the three smallest cogs shift very sloppy.

On the big chainring the three largest cogs tend to overshift and at

one time the the chain fell of the big cog and went on again in a bumpy

corner. In the middle ring (42T) it all went well what makes this cassette

a real nice one on the flats. I can stay in the middle ring all the time

although 42/12 doesn't sound/feel nice.



Our most extreme chain angles happen on our Bike Fridays. Because of

the 20" wheels, we normally ride on the big chainring; otherwise we'd be

putting lots of wear on the tiniest rear cogs. And those special 9 and

10 tooth rear cogs feel pretty rough, anyway.



When downshifting for a hill, we could move to the middle chainring, and

often we do that. But from time to time, we'll be in the big ring and

the big rear cog. I think that's part of the reason the shifting is

sometimes not perfect. There have been times I've been glad to have

bar-end shifters with a friction option.



BTW, my wife's Friday was shifting badly last week. It appeared the

rear derailleur hanger was a bit bent, so I removed the derailleur and

straightened the hanger. Upon reassembly, I had to play with the "B"

screw quite a while to prevent the derailleur body from scraping on the

chainstay! (The chainstay and seatstay on these bikes is one tube, bent

into a sort of "U" shape.)



--

- Frank Krygowski

A 9 and 10T cog? How is that gonna fit on a free hub body? I test rode a couple of folders and they were all terrible. I gave up on them. I rent a bike when traveling by air.

The Moulton has a three cog assembly consisting of 9, 10, and 11 tooth
cogs that, as a unit, screws onto the free hub.

--
Joe Riel

On 6/8/2014 12:05 PM, Lou Holtman wrote:
On Saturday, June 7, 2014 11:44:42 PM UTC+2, Frank Krygowski wrote:

Our most extreme chain angles happen on our Bike Fridays. Because of
the 20" wheels, we normally ride on the big chainring; otherwise we'd be
putting lots of wear on the tiniest rear cogs. And those special 9 and
10 tooth rear cogs feel pretty rough, anyway.


A 9 and 10T cog? How is that gonna fit on a free hub body?

See http://sheldonbrown.com/capreo/index.html about halfway down the
page. The last couple of cogs attach very differently.

I test rode a couple of folders and they were all terrible. I gave up on them.
I rent a bike when traveling by air.

And OTOH, when I've traveled and rented bikes, the bikes I got were
terrible!

Bikes Friday ride much better than most folding bike, at least based on
my testing. Some claim they ride no differently than a normal bike. I
wouldn't go that far, but I've met people who regularly used them for
century rides, and I've enjoyed riding mine on rides of at least 50 miles.

Admittedly, I don't have much of a connoisseur mentality. I'm willing
to put up with certain quirks. But on our first trip to mainland
Europe, we landed in Warsaw but flew home out of Zurich, having visited
several other countries in between. Having our own (very portable)
bikes was very nice. I think finding rentals would have been very
difficult, especially for town-to-town touring.

--
- Frank Krygowski